Fixing a shit ton of warning / code style and stuff (code inspector from IDEA)

Bungee/src/main/java/fr/pandacube/lib/bungee/commands/BrigadierCommand.java

@@ -33,9 +33,7 @@ import net.md_5.bungee.api.plugin.TabExecutor;
 import net.md_5.bungee.command.ConsoleCommandSender;
 
 public abstract class BrigadierCommand extends ChatStatic {
-	
+
-	private LiteralCommandNode<CommandSender> commandNode;
-	
 	protected BrigadierDispatcher dispatcher;
 	
 	public BrigadierCommand() {
@@ -56,8 +54,8 @@ public abstract class BrigadierCommand extends ChatStatic {
 		}
 		if (aliases == null)
 			aliases = new String[0];
-		
+
-		commandNode = dispatcher.register(builder);
+		LiteralCommandNode<CommandSender> commandNode = dispatcher.register(builder);
 		
 		// still have to be registered for console
 		BungeeCord.getInstance().getPluginManager().registerCommand(dispatcher.plugin, new CommandRelay(commandNode.getLiteral()));
@@ -75,7 +73,7 @@ public abstract class BrigadierCommand extends ChatStatic {
 	}
 	
 	private class CommandRelay extends Command implements TabExecutor {
-		private String alias;
+		private final String alias;
 		public CommandRelay(String alias) {
 			super(alias);
 			this.alias = alias;
@@ -98,7 +96,7 @@ public abstract class BrigadierCommand extends ChatStatic {
 			return suggestions.getList()
 					.stream()
 					.filter(s -> s.getRange().equals(supportedRange))
-					.map(s -> s.getText())
+					.map(Suggestion::getText)
 					.collect(Collectors.toList());
 		}
 	}
@@ -125,7 +123,7 @@ public abstract class BrigadierCommand extends ChatStatic {
 	}
 	
 	public static Predicate<CommandSender> isPlayer() {
-		return sender -> isPlayer(sender);
+		return BrigadierCommand::isPlayer;
 	}
 	
 	public static boolean isPlayer(CommandSender sender) {
@@ -133,7 +131,7 @@ public abstract class BrigadierCommand extends ChatStatic {
 	}
 	
 	public static Predicate<CommandSender> isConsole() {
-		return sender -> isConsole(sender);
+		return BrigadierCommand::isConsole;
 	}
 	
 	public static boolean isConsole(CommandSender sender) {
@@ -172,16 +170,14 @@ public abstract class BrigadierCommand extends ChatStatic {
 			String message = builder.getInput();
 			try {
 				int tokenStartPos = builder.getStart();
-				
+
-				List<String> results = Collections.emptyList();
-			
 				int firstSpacePos = message.indexOf(" ");
 				String[] args = (firstSpacePos + 1 > tokenStartPos - 1) ? new String[0]
 						: message.substring(firstSpacePos + 1, tokenStartPos - 1).split(" ", -1);
 				args = Arrays.copyOf(args, args.length + 1);
 				args[args.length - 1] = message.substring(tokenStartPos);
-				
+
-				results = suggestions.getSuggestions(sender, args.length - 1, args[args.length - 1], args);
+				List<String> results = suggestions.getSuggestions(sender, args.length - 1, args[args.length - 1], args);
 			
 				for (String s : results) {
 					if (s != null)

Bungee/src/main/java/fr/pandacube/lib/bungee/commands/BrigadierDispatcher.java

@@ -46,8 +46,8 @@ public class BrigadierDispatcher implements Listener {
 	
 	
 	
-	private CommandDispatcher<CommandSender> dispatcher;
+	private final CommandDispatcher<CommandSender> dispatcher;
-	/* package */ Plugin plugin;
+	/* package */ final Plugin plugin;
 	
 	private BrigadierDispatcher(Plugin pl) {
 		plugin = pl;
@@ -114,27 +114,23 @@ public class BrigadierDispatcher implements Listener {
 		
 		event.setCancelled(true);
 		
-		ProxyServer.getInstance().getScheduler().runAsync(plugin, () -> {
+		ProxyServer.getInstance().getScheduler().runAsync(plugin, () -> execute((ProxiedPlayer) event.getSender(), commandLine));
-			execute((ProxiedPlayer) event.getSender(), commandLine);
-		});
 		
 	}
 	
 	
 	
 	
-	/* package */ int execute(CommandSender sender, String commandWithoutSlash) {
+	/* package */ void execute(CommandSender sender, String commandWithoutSlash) {
 		ParseResults<CommandSender> parsed = dispatcher.parse(commandWithoutSlash, sender);
 		
 		try {
-			return dispatcher.execute(parsed);
+			dispatcher.execute(parsed);
 		} catch (CommandSyntaxException e) {
 			sender.sendMessage(Chat.failureText("Erreur d'utilisation de la commande : " + e.getMessage()).get());
-			return 0;
 		} catch (Throwable e) {
 			sender.sendMessage(Chat.failureText("Erreur lors de l'exécution de la commande : " + e.getMessage()).get());
 			Log.severe(e);
-			return 0;
 		}
 		
 	}

Bungee/src/main/java/fr/pandacube/lib/bungee/util/PluginMessagePassthrough.java

@@ -25,7 +25,7 @@ public class PluginMessagePassthrough implements Listener {
 	
 	public static void clear() {
 		synchronized (channels) {
-			new ArrayList<>(channels).forEach(c -> unregister(c));
+			unregisterAll(channels.toArray(new String[0]));
 		}
 	}
 	

CLI/src/main/java/fr/pandacube/lib/cli/BrigadierCommand.java

@@ -1,7 +1,6 @@
 package fr.pandacube.lib.cli;
 
 import java.util.Arrays;
-import java.util.Collections;
 import java.util.List;
 import java.util.concurrent.CompletableFuture;
 
@@ -22,16 +21,14 @@ import fr.pandacube.lib.core.util.Log;
 import fr.pandacube.lib.core.util.Reflect;
 
 public abstract class BrigadierCommand extends ChatStatic {
-	
+
-	private LiteralCommandNode<Object> commandNode;
-	
 	public BrigadierCommand() {
 		LiteralArgumentBuilder<Object> builder = buildCommand();
 		String[] aliases = getAliases();
 		if (aliases == null)
 			aliases = new String[0];
-		
+
-		commandNode = BrigadierDispatcher.instance.register(builder);
+		LiteralCommandNode<Object> commandNode = BrigadierDispatcher.instance.register(builder);
 		
 		
 		for (String alias : aliases) {
@@ -94,16 +91,14 @@ public abstract class BrigadierCommand extends ChatStatic {
 			String message = builder.getInput();
 			try {
 				int tokenStartPos = builder.getStart();
-				
-				List<String> results = Collections.emptyList();
 			
 				int firstSpacePos = message.indexOf(" ");
 				String[] args = (firstSpacePos + 1 > tokenStartPos - 1) ? new String[0]
 						: message.substring(firstSpacePos + 1, tokenStartPos - 1).split(" ", -1);
 				args = Arrays.copyOf(args, args.length + 1);
 				args[args.length - 1] = message.substring(tokenStartPos);
-				
+
-				results = suggestions.getSuggestions(sender, args.length - 1, args[args.length - 1], args);
+				List<String> results = suggestions.getSuggestions(sender, args.length - 1, args[args.length - 1], args);
 			
 				for (String s : results) {
 					if (s != null)

CLI/src/main/java/fr/pandacube/lib/cli/BrigadierDispatcher.java

@@ -31,9 +31,9 @@ public class BrigadierDispatcher implements Completer {
 	
 	
 	
-	private CommandDispatcher<Object> dispatcher;
+	private final CommandDispatcher<Object> dispatcher;
 	
-	private Object sender = new Object();	
+	private final Object sender = new Object();
 	
 	public BrigadierDispatcher() {
 		dispatcher = new CommandDispatcher<>();
@@ -69,7 +69,9 @@ public class BrigadierDispatcher implements Completer {
 		
 		Suggestions completeResult = getSuggestions(bufferBeforeCursor);
 		
-		completeResult.getList().stream().map(s -> s.getText()).forEach(candidates::add);
+		completeResult.getList().stream()
+				.map(Suggestion::getText)
+				.forEach(candidates::add);
 		
 		return completeResult.getRange().getStart();
 	}

CLI/src/main/java/fr/pandacube/lib/cli/CLI.java

@@ -38,8 +38,8 @@ public class CLI {
 	
 	
 	
-	private ConsoleReader reader;
+	private final ConsoleReader reader;
-	private Logger logger;
+	private final Logger logger;
 	
 	
 	public CLI() throws IOException {
@@ -78,9 +78,7 @@ public class CLI {
 				if (line.trim().equals(""))
 					continue;
 				String cmdLine = line;
-				new Thread(() -> {
+				new Thread(() -> BrigadierDispatcher.instance.execute(cmdLine), "CLICmdThread #"+(i++)).start();
-					BrigadierDispatcher.instance.execute(cmdLine);
-				}, "CLICmdThread #"+(i++)).start();
 				
 			}
 		} catch (IOException e) {

CLI/src/main/java/fr/pandacube/lib/cli/DailyLogRotateFileHandler.java

@@ -12,9 +12,9 @@ import java.util.logging.Handler;
 import java.util.logging.LogRecord;
 
 class DailyLogRotateFileHandler extends Handler {
+	private static final DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");
 
 	private BufferedWriter currentFile = null;
-	private DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");
 	private String currentFileDate = getCurrentDay();
 	private boolean closed = false;
 
@@ -24,7 +24,7 @@ class DailyLogRotateFileHandler extends Handler {
 		closed = true;
 		if (currentFile != null) try {
 			currentFile.close();
-		} catch (IOException e) {}
+		} catch (IOException ignored) {}
 	}
 
 	@Override
@@ -33,7 +33,7 @@ class DailyLogRotateFileHandler extends Handler {
 		if (currentFile == null) return;
 		try {
 			currentFile.flush();
-		} catch (IOException e) {}
+		} catch (IOException ignored) {}
 	}
 
 	@Override
@@ -68,7 +68,7 @@ class DailyLogRotateFileHandler extends Handler {
 			try {
 				currentFile.flush();
 				currentFile.close();
-			} catch (IOException e) {}
+			} catch (IOException ignored) {}
 			new File("logs/latest.log").renameTo(new File("logs/" + currentFileDate + ".log"));
 		}
 
@@ -76,11 +76,10 @@ class DailyLogRotateFileHandler extends Handler {
 		try {
 			File logDir = new File("logs");
 			logDir.mkdir();
-			currentFile = new BufferedWriter(new FileWriter(new File("logs/latest.log"), true));
+			currentFile = new BufferedWriter(new FileWriter("logs/latest.log", true));
 		} catch (SecurityException | IOException e) {
 			reportError("Erreur lors de l'initialisation d'un fichier log", e, ErrorManager.OPEN_FAILURE);
 			currentFile = null;
-			return;
 		}
 
 	}

Core/pom.xml

@@ -36,24 +36,24 @@
         <dependency>
 		    <groupId>net.kyori</groupId>
 		    <artifactId>adventure-api</artifactId>
-		    <version>4.8.1</version>
+		    <version>4.11.0</version>
 		 </dependency>
 		 <dependency>
 			<groupId>net.kyori</groupId>
 			<artifactId>adventure-platform-bungeecord</artifactId>
-			<version>4.0.1-SNAPSHOT</version>
+			<version>4.1.1</version>
 		</dependency>
 		<dependency>
 		    <groupId>net.kyori</groupId>
 		    <artifactId>adventure-text-serializer-plain</artifactId>
-		    <version>4.8.1</version>
+		    <version>4.11.0</version>
 		</dependency>
 		 
 		 
         <dependency>
 		    <groupId>io.github.classgraph</groupId>
 		    <artifactId>classgraph</artifactId>
-		    <version>4.8.108</version>
+		    <version>4.8.147</version>
 		</dependency>
 		
 		<dependency>

Core/src/main/java/fr/pandacube/lib/core/chat/Chat.java

@@ -36,7 +36,7 @@ import net.md_5.bungee.api.chat.BaseComponent;
 
 public abstract sealed class Chat extends ChatStatic implements HoverEventSource<Component>, ComponentLike {
 	
-	protected ComponentBuilder<?, ?> builder;
+	protected final ComponentBuilder<?, ?> builder;
 	protected boolean console = false;
 	
 	/* package */ Chat(ComponentBuilder<?, ?> b) {
@@ -76,12 +76,11 @@ public abstract sealed class Chat extends ChatStatic implements HoverEventSource
 	
 	
 	public Chat then(Component comp) {
-		if (comp instanceof TextComponent) {
+		if (comp instanceof TextComponent txtComp) {
-			TextComponent txtComp = (TextComponent) comp;
+			if (!txtComp.hasStyling() && (txtComp.content().isEmpty())) {
-			if (!txtComp.hasStyling() && (txtComp.content() == null || txtComp.content().isEmpty())) {
 				// no need to add the provided component to the current component.
 				// but eventual child component must be added
-				if (txtComp.children() != null && !txtComp.children().isEmpty()) {
+				if (!txtComp.children().isEmpty()) {
 					for (Component child : txtComp.children())
 						then(child);
 				}
@@ -313,9 +312,8 @@ public abstract sealed class Chat extends ChatStatic implements HoverEventSource
 	
 	@Override
 	public boolean equals(Object obj) {
-		if (obj == null || !(obj instanceof Chat))
+		return obj instanceof Chat c
-			return false;
+				&& getAdv().equals(c.getAdv());
-		return getAdv().equals(((Chat)obj).getAdv());
 	}
 	
 	@Override
@@ -330,18 +328,7 @@ public abstract sealed class Chat extends ChatStatic implements HoverEventSource
 	
 	
 	
-	
 
-	/* package */ static Object[] filterChatToBaseComponent(Object[] values) {
-		if (values == null)
-			return null;
-		for (int i = 0; i < values.length; i++) {
-			Object v = values[i];
-			if (v instanceof Chat)
-				values[i] = ((Chat) v).get();
-		}
-		return values;
-	}
 
 	/* package */ static ComponentLike[] filterObjToComponentLike(Object[] values) {
 		if (values == null)

Core/src/main/java/fr/pandacube/lib/core/chat/ChatColorUtil.java

@@ -18,18 +18,16 @@ public class ChatColorUtil {
     public static final String ALL_COLORS = "0123456789AaBbCcDdEeFf";
 
 
-    private static Pattern HEX_COLOR_PATTERN = Pattern.compile("§x(?>§[0-9a-f]){6}", Pattern.CASE_INSENSITIVE);
+    private static final Pattern HEX_COLOR_PATTERN = Pattern.compile("§x(?>§[\\da-f]){6}", Pattern.CASE_INSENSITIVE);
-    private static Pattern ESS_COLOR_PATTERN = Pattern.compile("§#[0-9a-f]{6}", Pattern.CASE_INSENSITIVE);
+    private static final Pattern ESS_COLOR_PATTERN = Pattern.compile("§#[\\da-f]{6}", Pattern.CASE_INSENSITIVE);
     
     /**
      * Return the legacy format needed to reproduce the format at the end of the provided legacy text.
      * Supports standard chat colors and formats, BungeeCord Chat rgb format and EssentialsX rgb format.
      * The RGB value from EssentialsX format is converted to BungeeCord Chat when included in the returned value.
-     * @param legacyText
-     * @return
      */
 	public static String getLastColors(String legacyText) {
-        String result = "";
+        StringBuilder result = new StringBuilder();
         int length = legacyText.length();
 
         for (int index = length - 2; index >= 0; index--) {
@@ -42,7 +40,7 @@ public class ChatColorUtil {
             			&& (legacyText.charAt(index - 11) == 'x'
             				|| legacyText.charAt(index - 11) == 'X')
             			&& HEX_COLOR_PATTERN.matcher(rgb = legacyText.substring(index - 12, index + 2)).matches()) {
-	                result = rgb + result;
+	                result.insert(0, rgb);
 	                break;
 	            }
             	
@@ -53,7 +51,7 @@ public class ChatColorUtil {
             		rgb = "§x§" + rgb.charAt(2) + "§" + rgb.charAt(3)
             		+ "§" + rgb.charAt(4) + "§" + rgb.charAt(5)
             		+ "§" + rgb.charAt(6) + "§" + rgb.charAt(7);
-	                result = rgb + result;
+	                result.insert(0, rgb);
             		break;
             	}
             	
@@ -62,7 +60,7 @@ public class ChatColorUtil {
                 ChatColor legacyColor = getChatColorByChar(colorChar);
 
                 if (legacyColor != null) {
-                    result = legacyColor.toString() + result;
+                    result.insert(0, legacyColor);
 
                     // Once we find a color or reset we can stop searching
                     char col = legacyColor.toString().charAt(1);
@@ -75,7 +73,7 @@ public class ChatColorUtil {
             }
         }
 
-        return result;
+        return result.toString();
     }
 	
 	public static ChatColor getChatColorByChar(char code) {
@@ -215,7 +213,7 @@ public class ChatColorUtil {
 	private static String forceFormat(String legacyText, ChatColor format) {
 		return format + legacyText
 				.replace(format.toString(), "") // remove previous tag to make the result cleaner
-				.replaceAll("§([a-frA-FR0-9])", "§$1" + format);
+				.replaceAll("§([a-frA-FR\\d])", "§$1" + format);
 	}
 	
 	
@@ -270,7 +268,7 @@ public class ChatColorUtil {
 	public static class ChatValueGradient {
 		private record GradientValueColor(float value, TextColor color) { } // Java 16
 		
-		List<GradientValueColor> colors = new ArrayList<>();
+		final List<GradientValueColor> colors = new ArrayList<>();
 		
 		public synchronized ChatValueGradient add(float v, TextColor col) {
 			colors.add(new GradientValueColor(v, col));

Core/src/main/java/fr/pandacube/lib/core/chat/ChatStatic.java

@@ -114,16 +114,5 @@ public abstract class ChatStatic {
 	}
 	
 	
-	
+
-	
-	
-//	public static void main(String[] args) {
-//		for (Chat c : new Chat[] {
-//				chat(),
-//				text("toto").color(NamedTextColor.GRAY),
-//				legacyText("tot§9o").color(NamedTextColor.GRAY),
-//		}) {
-//			System.out.println(GsonComponentSerializer.gson().serialize(c.getAdv()));
-//		}
-//	}
 }

Core/src/main/java/fr/pandacube/lib/core/chat/ChatUtil.java

@@ -1,9 +1,5 @@
 package fr.pandacube.lib.core.chat;
 
-import static fr.pandacube.lib.core.chat.ChatStatic.chat;
-import static fr.pandacube.lib.core.chat.ChatStatic.legacyText;
-import static fr.pandacube.lib.core.chat.ChatStatic.text;
-
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
@@ -13,8 +9,6 @@ import java.util.TreeSet;
 import java.util.stream.Collectors;
 
 import com.google.common.collect.ImmutableMap;
-
-import fr.pandacube.lib.core.chat.Chat.FormatableChat;
 import net.kyori.adventure.text.Component;
 import net.kyori.adventure.text.TextComponent;
 import net.kyori.adventure.text.TranslatableComponent;
@@ -24,6 +18,12 @@ import net.kyori.adventure.text.format.TextDecoration;
 import net.kyori.adventure.text.format.TextDecoration.State;
 import net.md_5.bungee.api.ChatColor;
 
+import fr.pandacube.lib.core.chat.Chat.FormatableChat;
+
+import static fr.pandacube.lib.core.chat.ChatStatic.chat;
+import static fr.pandacube.lib.core.chat.ChatStatic.legacyText;
+import static fr.pandacube.lib.core.chat.ChatStatic.text;
+
 public class ChatUtil {
 
 	public static final int DEFAULT_CHAR_SIZE = 6;
@@ -328,12 +328,10 @@ public class ChatUtil {
 			for (Component c : ((TranslatableComponent)component).args())
 				count += componentWidth(c, console, actuallyBold);
 		}
-		
+
-		if (component.children() != null) {
+		for (Component c : component.children())
-			for (Component c : component.children())
+			count += componentWidth(c, console, actuallyBold);
-				count += componentWidth(c, console, actuallyBold);
+
-		}
-		
 		return count;
 	}
 	
@@ -345,7 +343,7 @@ public class ChatUtil {
 		int count = 0;
 		for (char c : str.toCharArray())
 			count += charW(c, console, bold);
-		return (count < 0) ? 0 : count;
+		return Math.max(count, 0);
 	}
 
 	public static int charW(char c, boolean console, boolean bold) {
@@ -364,7 +362,7 @@ public class ChatUtil {
 	
 	public static List<Chat> wrapInLimitedPixelsToChat(String legacyText, int pixelWidth) {
 		return wrapInLimitedPixels(legacyText, pixelWidth).stream()
-				.map(t -> legacyText(t))
+				.map(ChatStatic::legacyText)
 				.collect(Collectors.toList());
 	}
 	
@@ -377,7 +375,7 @@ public class ChatUtil {
 		int currentLineSize = 0;
 		int index = 0;
 		
-		String currentWord = "";
+		StringBuilder currentWord = new StringBuilder();
 		int currentWordSize = 0;
 		boolean bold = false;
 		boolean firstCharCurrentWordBold = false;
@@ -385,9 +383,9 @@ public class ChatUtil {
 		do {
 			char c = legacyText.charAt(index);
 			if (c == ChatColor.COLOR_CHAR && index < legacyText.length() - 1) {
-				currentWord += c;
+				currentWord.append(c);
 				c = legacyText.charAt(++index);
-				currentWord += c;
+				currentWord.append(c);
 				
 				if (c == 'l' || c == 'L') // bold
 					bold = true;
@@ -404,7 +402,7 @@ public class ChatUtil {
 					lines.add(currentLine);
 					String lastStyle = ChatColorUtil.getLastColors(currentLine);
 					if (currentWord.charAt(0) == ' ') {
-						currentWord = currentWord.substring(1);
+						currentWord = new StringBuilder(currentWord.substring(1));
 						currentWordSize -= charW(' ', false, firstCharCurrentWordBold);
 					}
 					currentLine = (lastStyle.equals("§r") ? "" : lastStyle) + currentWord;
@@ -414,7 +412,7 @@ public class ChatUtil {
 					currentLine += currentWord;
 					currentLineSize += currentWordSize;
 				}
-				currentWord = ""+c;
+				currentWord = new StringBuilder("" + c);
 				currentWordSize = charW(c, false, bold);
 				firstCharCurrentWordBold = bold;
 			}
@@ -423,15 +421,12 @@ public class ChatUtil {
 					lines.add(currentLine);
 					String lastStyle = ChatColorUtil.getLastColors(currentLine);
 					if (currentWord.charAt(0) == ' ') {
-						currentWord = currentWord.substring(1);
+						currentWord = new StringBuilder(currentWord.substring(1));
-						currentWordSize -= charW(' ', false, firstCharCurrentWordBold);
 					}
 					currentLine = (lastStyle.equals("§r") ? "" : lastStyle) + currentWord;
-					currentLineSize = currentWordSize;
 				}
 				else {
 					currentLine += currentWord;
-					currentLineSize += currentWordSize;
 				}
 				// wrap after
 				lines.add(currentLine);
@@ -439,12 +434,12 @@ public class ChatUtil {
 				
 				currentLine = lastStyle.equals("§r") ? "" : lastStyle;
 				currentLineSize = 0;
-				currentWord = "";
+				currentWord = new StringBuilder();
 				currentWordSize = 0;
 				firstCharCurrentWordBold = bold;
 			}
 			else {
-				currentWord += c;
+				currentWord.append(c);
 				currentWordSize += charW(c, false, bold);
 			}
 			
@@ -674,7 +669,6 @@ public class ChatUtil {
 	 * 
 	 * Each element in the returned list represent 1 line of the tree view.
 	 * Thus, the caller may send each line separately or at once depending of the quantity of data.
-	 * @param node
 	 * @return A array of component, each element being a single line.
 	 */
 	public static List<Chat> treeView(DisplayTreeNode node, boolean console) {

Core/src/main/java/fr/pandacube/lib/core/commands/AbstractCommand.java

@@ -30,11 +30,8 @@ public class AbstractCommand extends ChatStatic {
 	 *        Le premier élément est l'argument qui suit le nom de la commande.
 	 *        Usuellement, ce paramètre correspond au paramètre
 	 *        <code>args</code> de la méthode onCommand
-	 * @param index
-	 * @return
 	 */
 	public static String getLastParams(String[] args, int index) {
-		if (index < 0 || index >= args.length) return null;
 		return String.join(" ", Arrays.copyOfRange(args, index, args.length));
 	}
 	

Core/src/main/java/fr/pandacube/lib/core/commands/BadCommandUsage.java

@@ -11,7 +11,6 @@ import java.util.logging.Logger;
  * 
  */
 public class BadCommandUsage extends RuntimeException {
-	private static final long serialVersionUID = 1L;
 
 	public BadCommandUsage() {
 		super();

Core/src/main/java/fr/pandacube/lib/core/commands/SuggestionsSupplier.java

@@ -19,17 +19,17 @@ public interface SuggestionsSupplier<S> {
 	/**
 	 * Number of suggestion visible at once without having to scroll
 	 */
-	public static int VISIBLE_SUGGESTION_COUNT = 10;
+	int VISIBLE_SUGGESTION_COUNT = 10;
 	
 	
-	public abstract List<String> getSuggestions(S sender, int tokenIndex, String token, String[] args);
+	List<String> getSuggestions(S sender, int tokenIndex, String token, String[] args);
 	
 	
 	
 	
 	
 	
-	public static Predicate<String> filter(String token) {
+	static Predicate<String> filter(String token) {
 		return suggestion -> suggestion != null && suggestion.toLowerCase().startsWith(token.toLowerCase());
 	}
 	
@@ -39,7 +39,7 @@ public interface SuggestionsSupplier<S> {
 	 * 
 	 * This methods consume the provided stream, so will not be usable anymore.
 	 */
-	public static List<String> collectFilteredStream(Stream<String> stream, String token) {
+	static List<String> collectFilteredStream(Stream<String> stream, String token) {
 		return stream.filter(filter(token)).sorted().collect(Collectors.toList());
 	}
 	
@@ -47,40 +47,40 @@ public interface SuggestionsSupplier<S> {
 	
 	
 	
-	public static <S> SuggestionsSupplier<S> empty() { return (s, ti, t, a) -> Collections.emptyList(); }
+	static <S> SuggestionsSupplier<S> empty() { return (s, ti, t, a) -> Collections.emptyList(); }
 	
-	public static <S> SuggestionsSupplier<S> fromCollectionsSupplier(Supplier<Collection<String>> streamSupplier) {
+	static <S> SuggestionsSupplier<S> fromCollectionsSupplier(Supplier<Collection<String>> streamSupplier) {
 		return (s, ti, token, a) -> collectFilteredStream(streamSupplier.get().stream(), token);
 	}
 	
-	public static <S> SuggestionsSupplier<S> fromStreamSupplier(Supplier<Stream<String>> streamSupplier) {
+	static <S> SuggestionsSupplier<S> fromStreamSupplier(Supplier<Stream<String>> streamSupplier) {
 		return (s, ti, token, a) -> collectFilteredStream(streamSupplier.get(), token);
 	}
 	
-	public static <S> SuggestionsSupplier<S> fromCollection(Collection<String> suggestions) {
+	static <S> SuggestionsSupplier<S> fromCollection(Collection<String> suggestions) {
 		return fromStreamSupplier(suggestions::stream);
 	}
 	
-	public static <S> SuggestionsSupplier<S> fromArray(String... suggestions) {
+	static <S> SuggestionsSupplier<S> fromArray(String... suggestions) {
 		return fromStreamSupplier(() -> Arrays.stream(suggestions));
 	}
 	
 	
-	public static <E extends Enum<E>, S> SuggestionsSupplier<S> fromEnum(Class<E> enumClass) {
+	static <E extends Enum<E>, S> SuggestionsSupplier<S> fromEnum(Class<E> enumClass) {
 		return fromEnumValues(enumClass.getEnumConstants());
 	}
 	
-	public static <E extends Enum<E>, S> SuggestionsSupplier<S> fromEnum(Class<E> enumClass, boolean lowerCase) {
+	static <E extends Enum<E>, S> SuggestionsSupplier<S> fromEnum(Class<E> enumClass, boolean lowerCase) {
 		return fromEnumValues(lowerCase, enumClass.getEnumConstants());
 	}
 	
 	@SafeVarargs
-	public static <E extends Enum<E>, S> SuggestionsSupplier<S> fromEnumValues(E... enumValues) {
+	static <E extends Enum<E>, S> SuggestionsSupplier<S> fromEnumValues(E... enumValues) {
 		return fromEnumValues(false, enumValues);
 	}
 	
 	@SafeVarargs
-	public static <E extends Enum<E>, S> SuggestionsSupplier<S> fromEnumValues(boolean lowerCase, E... enumValues) {
+	static <E extends Enum<E>, S> SuggestionsSupplier<S> fromEnumValues(boolean lowerCase, E... enumValues) {
 		return (s, ti, token, a) -> {
 			Stream<String> st = Arrays.stream(enumValues).map(Enum::name);
 			if (lowerCase)
@@ -91,7 +91,7 @@ public interface SuggestionsSupplier<S> {
 	
 	
 	
-	public static <S> SuggestionsSupplier<S> booleanValues() {
+	static <S> SuggestionsSupplier<S> booleanValues() {
 		return fromCollection(Arrays.asList("true", "false"));
 	}
 	
@@ -103,11 +103,8 @@ public interface SuggestionsSupplier<S> {
 	 * Create a {@link SuggestionsSupplier} that suggest numbers according to the provided range.
 	 * 
 	 * The current implementation only support range that include either -1 or 1.
-	 * @param min
-	 * @param max
-	 * @return
 	 */
-	public static <S> SuggestionsSupplier<S> fromIntRange(int min, int max, boolean compact) {
+	static <S> SuggestionsSupplier<S> fromIntRange(int min, int max, boolean compact) {
 		return fromLongRange(min, max, compact);
 	}
 	
@@ -118,11 +115,8 @@ public interface SuggestionsSupplier<S> {
 	 * Create a {@link SuggestionsSupplier} that suggest numbers according to the provided range.
 	 * 
 	 * The current implementation only support range that include either -1 or 1.
-	 * @param min
-	 * @param max
-	 * @return
 	 */
-	public static <S> SuggestionsSupplier<S> fromLongRange(long min, long max, boolean compact) {
+	static <S> SuggestionsSupplier<S> fromLongRange(long min, long max, boolean compact) {
 		if (max < min) {
 			throw new IllegalArgumentException("min should be less or equals than max");
 		}
@@ -179,7 +173,7 @@ public interface SuggestionsSupplier<S> {
 						}
 					}
 					
-					return collectFilteredStream(proposedValues.stream().map(i -> i.toString()), token);
+					return collectFilteredStream(proposedValues.stream().map(Object::toString), token);
 				} catch (NumberFormatException e) {
 					return Collections.emptyList();
 				}
@@ -196,9 +190,8 @@ public interface SuggestionsSupplier<S> {
 	/**
 	 * Create a {@link SuggestionsSupplier} that support greedy strings argument using the suggestion from this {@link SuggestionsSupplier}.
 	 * @param index the index of the first argument of the greedy string argument
-	 * @return
 	 */
-	public default SuggestionsSupplier<S> greedyString(int index) { 
+	default SuggestionsSupplier<S> greedyString(int index) {
 		
 		return (s, ti, token, args) -> {
 			
@@ -233,7 +226,7 @@ public interface SuggestionsSupplier<S> {
 	
 
 	
-	public default SuggestionsSupplier<S> quotableString() {
+	default SuggestionsSupplier<S> quotableString() {
 		return (s, ti, token, a) -> {
 			boolean startWithQuote = token.length() > 0 && (token.charAt(0) == '"' || token.charAt(0) == '\'');
 			String realToken = startWithQuote ? unescapeBrigadierQuotable(token.substring(1), token.charAt(0)) : token;
@@ -309,10 +302,8 @@ public interface SuggestionsSupplier<S> {
 	
 	
 	
-	public default SuggestionsSupplier<S> requires(Predicate<S> check) {
+	default SuggestionsSupplier<S> requires(Predicate<S> check) {
-		return (s, ti, to, a) -> {
+		return (s, ti, to, a) -> check.test(s) ? getSuggestions(s, ti, to, a) : Collections.emptyList();
-			return check.test(s) ? getSuggestions(s, ti, to, a) : Collections.emptyList();
-		};
 	}
 	
 
@@ -320,10 +311,8 @@ public interface SuggestionsSupplier<S> {
 	/**
 	 * Returns a new {@link SuggestionsSupplier} containing all the element of this instance then the element of the provided one,
 	 * with all duplicated values removed using {@link Stream#distinct()}.
-	 * @param other
-	 * @return
 	 */
-	public default SuggestionsSupplier<S> merge(SuggestionsSupplier<S> other) {
+	default SuggestionsSupplier<S> merge(SuggestionsSupplier<S> other) {
 		return (s, ti, to, a) -> {
 			List<String> l1 = getSuggestions(s, ti, to, a);
 			List<String> l2 = other.getSuggestions(s, ti, to, a);
@@ -337,10 +326,8 @@ public interface SuggestionsSupplier<S> {
 	/**
 	 * Returns a new {@link SuggestionsSupplier} containing all the suggestions of this instance,
 	 * but if this list is still empty, returns the suggestions from the provided one.
-	 * @param other
-	 * @return
 	 */
-	public default SuggestionsSupplier<S> orIfEmpty(SuggestionsSupplier<S> other) {
+	default SuggestionsSupplier<S> orIfEmpty(SuggestionsSupplier<S> other) {
 		return (s, ti, to, a) -> {
 			List<String> l1 = getSuggestions(s, ti, to, a);
 			return !l1.isEmpty() ? l1 : other.getSuggestions(s, ti, to, a);

Core/src/main/java/fr/pandacube/lib/core/config/AbstractConfig.java

@@ -6,14 +6,12 @@ import java.io.FileReader;
 import java.io.IOException;
 import java.util.ArrayList;
 import java.util.Arrays;
-import java.util.Collections;
 import java.util.List;
 
 import fr.pandacube.lib.core.chat.ChatColorUtil;
 import fr.pandacube.lib.core.util.Log;
 /**
- * Classe chargeant en mémoire un fichier de configuration ou un dossier donné
+ * Class tht loads a specific config file or directory
- * @author Marc Baloup
  *
  */
 public abstract class AbstractConfig {
@@ -22,12 +20,13 @@ public abstract class AbstractConfig {
 	 * Correspond au dossier ou au fichier de configuration traité par la sous-classe
 	 * courante de {@link AbstractConfig}
 	 */
-	protected File configFile;
+	protected final File configFile;
 	
 	/**
-	 * @param fileOrDirName le nom du fichier ou du dossier correspondant à la sous-classe de {@link AbstractConfig}
+	 * @param configDir the parent directory
-	 * @param isDir <code>true</code> si il s'agit d'un dossier, <code>false</code> sinon
+	 * @param fileOrDirName The name of the config file or folder
-	 * @throws IOException si le fichier est impossible à créer
+	 * @param type if the provided name is a file or a directory
+	 * @throws IOException if we cannot create the file
 	 */
 	public AbstractConfig(File configDir, String fileOrDirName, FileType type) throws IOException {
 		configFile = new File(configDir, fileOrDirName);
@@ -38,13 +37,12 @@ public abstract class AbstractConfig {
 	}
 	
 	/**
-	 * Retourne toutes les lignes d'un fichier donné
+	 * Gets the lines from the config file
-	 * @param ignoreEmpty <code>true</code> si on doit ignorer les lignes vides
+	 * @param ignoreEmpty <code>true</code> if we ignore the empty lines
-	 * @param ignoreHashtagComment <code>true</code> si on doit ignorer les lignes commentés (commençant par un #)
+	 * @param ignoreHashtagComment <code>true</code> if we ignore the comment lines (starting with {@code #})
-	 * @param trimOutput <code>true</code> si on doit appeller la méthode String.trim() sur chaque ligne retournée
+	 * @param trimOutput <code>true</code> if we want to trim all lines using {@link String#trim()}
-	 * @param f le fichier à lire
+	 * @param f the file to read
-	 * @return la liste des lignes utiles
+	 * @return the list of lines, filtered according to the parameters
-	 * @throws IOException
 	 */
 	protected List<String> getFileLines(boolean ignoreEmpty, boolean ignoreHashtagComment, boolean trimOutput, File f) throws IOException {
 		if (!f.isFile())
@@ -83,7 +81,6 @@ public abstract class AbstractConfig {
 	 * @param ignoreHashtagComment <code>true</code> si on doit ignorer les lignes commentés (commençant par un #)
 	 * @param trimOutput <code>true</code> si on doit appeller la méthode String.trim() sur chaque ligne retournée
 	 * @return la liste des lignes utiles
-	 * @throws IOException
 	 */
 	protected List<String> getFileLines(boolean ignoreEmpty, boolean ignoreHashtagComment, boolean trimOutput) throws IOException {
 		return getFileLines(ignoreEmpty, ignoreHashtagComment, trimOutput, configFile);
@@ -119,7 +116,7 @@ public abstract class AbstractConfig {
 	
 	
 	public static List<String> getSplittedString(String value, String split) {
-		return Collections.unmodifiableList(Arrays.asList(value.split(split)));
+		return List.of(value.split(split));
 	}
 	
 

Core/src/main/java/fr/pandacube/lib/core/config/AbstractConfigManager.java

@@ -17,13 +17,11 @@ public abstract class AbstractConfigManager {
 	
 	/**
 	 * Implementation must close all closeable configuration (saving for example)
-	 * @throws IOException 
 	 */
 	public abstract void close() throws IOException;
 	
 	/**
 	 * Implementation must init all config data
-	 * @throws IOException 
 	 */
 	public abstract void init() throws IOException;
 	

Core/src/main/java/fr/pandacube/lib/core/db/DB.java

@@ -18,15 +18,15 @@ import fr.pandacube.lib.core.util.Log;
 /**
  * Static class to handle most of the database operations.
  * 
- * To use this database library, first call {@link #init(DBConnection)} with an appropriate {@link DBConnection},
+ * To use this database library, first call {@link #init(DBConnection, String)} with an appropriate {@link DBConnection},
  * they you can initialize every table you need for your application, using {@link #initTable(Class)}.
  *
  * @author Marc Baloup
  */
 public final class DB {
 
-	private static List<Class<? extends SQLElement<?>>> tables = new ArrayList<>();
+	private static final List<Class<? extends SQLElement<?>>> tables = new ArrayList<>();
-	private static Map<Class<? extends SQLElement<?>>, String> tableNames = new HashMap<>();
+	private static final Map<Class<? extends SQLElement<?>>, String> tableNames = new HashMap<>();
 
 	private static DBConnection connection;
 	/* package */ static String tablePrefix = "";
@@ -35,7 +35,7 @@ public final class DB {
 		return connection;
 	}
 
-	public synchronized static <E extends SQLElement<E>> void init(DBConnection conn, String tablePrefix) {
+	public synchronized static void init(DBConnection conn, String tablePrefix) {
 		connection = conn;
 		DB.tablePrefix = Objects.requireNonNull(tablePrefix);
 	}
@@ -62,7 +62,7 @@ public final class DB {
 		
 		String tableName = tablePrefix + elem.tableName();
 
-		String sql = "CREATE TABLE IF NOT EXISTS " + tableName + " (";
+		StringBuilder sql = new StringBuilder("CREATE TABLE IF NOT EXISTS " + tableName + " (");
 		List<Object> params = new ArrayList<>();
 
 		Collection<SQLField<E, ?>> tableFields = elem.getFields().values();
@@ -71,14 +71,15 @@ public final class DB {
 			ParameterizedSQLString statementPart = f.forSQLPreparedStatement();
 			params.addAll(statementPart.parameters());
 
-			if (!first) sql += ", ";
+			if (!first)
+				sql.append(", ");
 			first = false;
-			sql += statementPart.sqlString();
+			sql.append(statementPart.sqlString());
 		}
 
-		sql += ", PRIMARY KEY id(id))";
+		sql.append(", PRIMARY KEY id(id))");
 		
-		try (PreparedStatement ps = connection.getNativeConnection().prepareStatement(sql)) {
+		try (PreparedStatement ps = connection.getNativeConnection().prepareStatement(sql.toString())) {
 			int i = 1;
 			for (Object val : params)
 				ps.setObject(i++, val);
@@ -93,11 +94,9 @@ public final class DB {
 	}
 
 	private static boolean tableExistInDB(String tableName) throws SQLException {
-		boolean exist = false;
 		try (ResultSet set = connection.getNativeConnection().getMetaData().getTables(null, null, tableName, null)) {
-			exist = set.next();
+			return set.next();
 		}
-		return exist;
 	}
 
 	@SuppressWarnings("unchecked")
@@ -277,7 +276,7 @@ public final class DB {
 	
 
 	
-	public static <E extends SQLElement<E>> SQLUpdate<E> update(Class<E> elemClass, SQLWhere<E> where) throws DBException {
+	public static <E extends SQLElement<E>> SQLUpdate<E> update(Class<E> elemClass, SQLWhere<E> where) {
 		return new SQLUpdate<>(elemClass, where);
 	}
 	
@@ -291,7 +290,6 @@ public final class DB {
 	 * @param elemClass the SQLElement representing the table.
 	 * @param where the condition to meet for an element to be deleted from the table. If null, the table is truncated using {@link #truncateTable(Class)}.
 	 * @return The return value of {@link PreparedStatement#executeUpdate()}, for an SQL query {@code DELETE}.
-	 * @throws DBException
 	 */
 	public static <E extends SQLElement<E>> int delete(Class<E> elemClass, SQLWhere<E> where) throws DBException {
 		initTable(elemClass);
@@ -369,7 +367,7 @@ public final class DB {
 							val = ((SQLCustomType<Object, Object>)sqlField.type).dbToJavaConv.apply(val);
 						} catch (Exception e) {
 							throw new DBException("Error while converting value of field '"+sqlField.getName()+"' with SQLCustomType from "+((SQLCustomType<Object, Object>)sqlField.type).intermediateJavaType
-									+"(jdbc source) to "+sqlField.type.getJavaType()+"(java destination). The original value is '"+val.toString()+"'", e);
+									+"(jdbc source) to "+sqlField.type.getJavaType()+"(java destination). The original value is '"+ val +"'", e);
 						}
 					}
 					
@@ -383,7 +381,7 @@ public final class DB {
 			}
 
 			if (!instance.isValidForSave()) throw new DBException(
-					"This SQLElement representing a database entry is not valid for save : " + instance.toString());
+					"This SQLElement representing a database entry is not valid for save : " + instance);
 
 			return instance;
 		} catch (ReflectiveOperationException | IllegalArgumentException | SecurityException | SQLException e) {

Core/src/main/java/fr/pandacube/lib/core/db/DBConnection.java

@@ -11,15 +11,14 @@ public class DBConnection {
 	private static final long CONNECTION_CHECK_TIMEOUT = 30000; // in ms
 	
 	private Connection conn;
-	private String url;
+	private final String url;
-	private String login;
+	private final String login;
-	private String pass;
+	private final String pass;
 	
 	private long timeOfLastCheck = 0;
 
 	public DBConnection(String host, int port, String dbname, String l, String p)
-			throws ClassNotFoundException, SQLException {
+			throws SQLException {
-		//Class.forName("com.mysql.jdbc.Driver"); // apparently this is deprecated now
 		url = "jdbc:mysql://" + host + ":" + port + "/" + dbname
 				+ "?autoReconnect=true"
 				+ "&useUnicode=true"
@@ -58,7 +57,7 @@ public class DBConnection {
     			return true;
     		
         	try (ResultSet rs = conn.createStatement().executeQuery("SELECT 1;")) {
-	            return rs == null ? false : rs.next();
+	            return rs != null && rs.next();
             }
         } catch (Exception e) {
             return false;
@@ -78,7 +77,7 @@ public class DBConnection {
 	public void close() {
 		try {
 			conn.close();
-		} catch (Exception e) {}
+		} catch (Exception ignored) {}
 	}
 
 }

Core/src/main/java/fr/pandacube/lib/core/db/DBException.java

@@ -1,7 +1,6 @@
 package fr.pandacube.lib.core.db;
 
 public class DBException extends Exception {
-	private static final long serialVersionUID = 1L;
 
 	public DBException(Throwable initCause) {
 		super(initCause);

Core/src/main/java/fr/pandacube/lib/core/db/DBInitTableException.java

@@ -1,11 +1,6 @@
 package fr.pandacube.lib.core.db;
 
 public class DBInitTableException extends DBException {
-	private static final long serialVersionUID = 1L;
-
-	/* package */ <E extends SQLElement<E>> DBInitTableException(Class<E> tableElem) {
-		super("Error while initializing table " + ((tableElem != null) ? tableElem.getName() : "null"));
-	}
 
 	/* package */ <E extends SQLElement<E>> DBInitTableException(Class<E> tableElem, Throwable t) {
 		super("Error while initializing table " + ((tableElem != null) ? tableElem.getName() : "null"), t);

Core/src/main/java/fr/pandacube/lib/core/db/ParameterizedSQLString.java

@@ -2,13 +2,7 @@ package fr.pandacube.lib.core.db;
 
 import java.util.List;
 
-//public record ParameterizedSQLString(String sqlString, List<Object> parameters) { } // Java 16
+public record ParameterizedSQLString(String sqlString, List<Object> parameters) {
-public class ParameterizedSQLString {
+
-	private final String sqlString;
+
-	private final List<Object> parameters;
-	public ParameterizedSQLString(String sqlString, List<Object> parameters) {
-		this.sqlString = sqlString; this.parameters = parameters;
-	}
-	public String sqlString() { return sqlString; }
-	public List<Object> parameters() { return parameters; }
 }

Core/src/main/java/fr/pandacube/lib/core/db/SQLElement.java

@@ -1,5 +1,12 @@
 package fr.pandacube.lib.core.db;
 
+import com.google.common.base.MoreObjects;
+import com.google.common.base.MoreObjects.ToStringHelper;
+import com.google.gson.JsonObject;
+import fr.pandacube.lib.core.util.EnumUtil;
+import fr.pandacube.lib.core.util.Json;
+import fr.pandacube.lib.core.util.Log;
+
 import java.lang.reflect.Modifier;
 import java.sql.Date;
 import java.sql.PreparedStatement;
@@ -17,19 +24,11 @@ import java.util.Objects;
 import java.util.Set;
 import java.util.UUID;
 
-import com.google.common.base.MoreObjects;
-import com.google.common.base.MoreObjects.ToStringHelper;
-import com.google.gson.JsonObject;
-
-import fr.pandacube.lib.core.util.EnumUtil;
-import fr.pandacube.lib.core.util.Json;
-import fr.pandacube.lib.core.util.Log;
-
 public abstract class SQLElement<E extends SQLElement<E>> {
 	/** cache for fields for each subclass of SQLElement */
 	/* package */ static final Map<Class<? extends SQLElement<?>>, SQLFieldMap<? extends SQLElement<?>>> fieldsCache = new HashMap<>();
 
-	DBConnection db = DB.getConnection();
+	private final DBConnection db = DB.getConnection();
 
 	private boolean stored = false;
 	private int id;
@@ -109,7 +108,7 @@ public abstract class SQLElement<E extends SQLElement<E>> {
 			field.setAccessible(true);
 			try {
 				Object val = field.get(null);
-				if (val == null || !(val instanceof SQLField)) {
+				if (!(val instanceof SQLField)) {
 					Log.severe("[ORM] The field " + field.getDeclaringClass().getName() + "." + field.getName() + " can't be initialized because its value is null.");
 					continue;
 				}
@@ -122,7 +121,7 @@ public abstract class SQLElement<E extends SQLElement<E>> {
 				checkedF.setSQLElementType((Class<E>) getClass());
 				listToFill.addField((SQLField<?, ?>) val);
 			} catch (IllegalArgumentException | IllegalAccessException e) {
-				Log.severe("Can't get value of static field " + field.toString(), e);
+				Log.severe("Can't get value of static field " + field, e);
 			}
 		}
 
@@ -147,20 +146,18 @@ public abstract class SQLElement<E extends SQLElement<E>> {
 		if (!fields.containsValue(sqlField)) // should not append at runtime because of generic type check at compilation
 			throw new IllegalStateException("In the table "+getClass().getName()+ ": the field asked for modification is not initialized properly.");
 
-		boolean modify = false;
 		if (value == null) {
-			if (sqlField.canBeNull || (sqlField.autoIncrement && !stored)) modify = true;
+			if (!sqlField.canBeNull && (!sqlField.autoIncrement || stored))
-			else
 				throw new IllegalArgumentException(
 						"SQLField '" + sqlField.getName() + "' of " + getClass().getName() + " is a NOT NULL field");
 		}
-		else if (sqlField.type.isAssignableFrom(value)) modify = true;
+		else if (!sqlField.type.isInstance(value)) {
-		else
 			throw new IllegalArgumentException("SQLField '" + sqlField.getName() + "' of " + getClass().getName()
-					+ " type is '" + sqlField.type.toString() + "' and can't accept values of type "
+					+ " type is '" + sqlField.type + "' and can't accept values of type "
 					+ value.getClass().getName());
+		}
 
-		if (modify) if (!values.containsKey(sqlField)) {
+		if (!values.containsKey(sqlField)) {
 			values.put(sqlField, value);
 			if (setModified) modifiedSinceLastSave.add(sqlField.getName());
 		}
@@ -227,7 +224,7 @@ public abstract class SQLElement<E extends SQLElement<E>> {
 	@SuppressWarnings("unchecked")
 	public E save() throws DBException {
 		if (!isValidForSave())
-			throw new IllegalStateException(toString() + " has at least one undefined value and can't be saved.");
+			throw new IllegalStateException(this + " has at least one undefined value and can't be saved.");
 
 		DB.initTable((Class<E>)getClass());
 		try {
@@ -251,24 +248,24 @@ public abstract class SQLElement<E extends SQLElement<E>> {
 				// values
 				values.put(fields.get("id"), null);
 
-				String concat_vals = "";
+				StringBuilder concatValues = new StringBuilder();
-				String concat_fields = "";
+				StringBuilder concatFields = new StringBuilder();
 				List<Object> psValues = new ArrayList<>();
 
 				boolean first = true;
 				for (Map.Entry<SQLField<E, ?>, Object> entry : values.entrySet()) {
 					if (!first) {
-						concat_vals += ",";
+						concatValues.append(",");
-						concat_fields += ",";
+						concatFields.append(",");
 					}
 					first = false;
-					concat_vals += " ? ";
+					concatValues.append(" ? ");
-					concat_fields += "`" + entry.getKey().getName() + "`";
+					concatFields.append("`").append(entry.getKey().getName()).append("`");
 					addValueToSQLObjectList(psValues, entry.getKey(), entry.getValue());
 				}
 				
 				try (PreparedStatement ps = db.getNativeConnection().prepareStatement(
-						"INSERT INTO " + DB.tablePrefix + tableName() + "  (" + concat_fields + ") VALUES (" + concat_vals + ")",
+						"INSERT INTO " + DB.tablePrefix + tableName() + "  (" + concatFields + ") VALUES (" + concatValues + ")",
 						Statement.RETURN_GENERATED_KEYS)) {
 
 					int i = 1;
@@ -300,7 +297,7 @@ public abstract class SQLElement<E extends SQLElement<E>> {
 				jValue = ((SQLCustomType)field.type).javaToDbConv.apply(jValue);
 			} catch (Exception e) {
 				throw new DBException("Error while converting value of field '"+field.getName()+"' with SQLCustomType from "+field.type.getJavaType()
-						+"(java source) to "+((SQLCustomType<?, ?>)field.type).intermediateJavaType+"(jdbc destination). The original value is '"+jValue.toString()+"'", e);
+						+"(java source) to "+((SQLCustomType<?, ?>)field.type).intermediateJavaType+"(jdbc destination). The original value is '"+jValue+"'", e);
 			}
 		}
 		list.add(jValue);
@@ -346,8 +343,6 @@ public abstract class SQLElement<E extends SQLElement<E>> {
 	}
 
 	protected static class SQLFieldMap<E extends SQLElement<E>> extends LinkedHashMap<String, SQLField<E, ?>> {
-		private static final long serialVersionUID = 1L;
-
 		private final Class<E> sqlElemClass;
 
 		private SQLFieldMap(Class<E> elemClass) {
@@ -382,7 +377,7 @@ public abstract class SQLElement<E extends SQLElement<E>> {
 	
 	@Override
 	public boolean equals(Object o) {
-		if (o == null || !(getClass().isInstance(o))) return false;
+		if (!(getClass().isInstance(o))) return false;
 		SQLElement<?> oEl = (SQLElement<?>) o;
 		if (oEl.getId() == null) return false;
 		return oEl.getId().equals(getId());
@@ -390,7 +385,7 @@ public abstract class SQLElement<E extends SQLElement<E>> {
 	
 	@Override
 	public int hashCode() {
-		return super.hashCode();
+		return getClass().hashCode() ^ Objects.hashCode(getId());
 	}
 	
 	
@@ -466,12 +461,12 @@ public abstract class SQLElement<E extends SQLElement<E>> {
 
 	public static final SQLType<Double> DOUBLE = new SQLType<>("DOUBLE", Double.class);
 	
-	public static final SQLType<String> CHAR(int charCount) {
+	public static SQLType<String> CHAR(int charCount) {
 		if (charCount <= 0) throw new IllegalArgumentException("charCount must be positive.");
 		return new SQLType<>("CHAR(" + charCount + ")", String.class);
 	}
 
-	public static final SQLType<String> VARCHAR(int charCount) {
+	public static SQLType<String> VARCHAR(int charCount) {
 		if (charCount <= 0) throw new IllegalArgumentException("charCount must be positive.");
 		return new SQLType<>("VARCHAR(" + charCount + ")", String.class);
 	}
@@ -479,29 +474,29 @@ public abstract class SQLElement<E extends SQLElement<E>> {
 	public static final SQLType<String> TEXT = new SQLType<>("TEXT", String.class);
 	public static final SQLType<String> STRING = TEXT;
 
-	public static final SQLType<byte[]> BINARY(int byteCount) {
+	public static SQLType<byte[]> BINARY(int byteCount) {
 		if (byteCount <= 0) throw new IllegalArgumentException("byteCount must be positive.");
 		return new SQLType<>("BINARY(" + byteCount + ")", byte[].class);
 	}
 
-	public static final SQLType<byte[]> VARBINARY(int byteCount) {
+	public static SQLType<byte[]> VARBINARY(int byteCount) {
 		if (byteCount <= 0) throw new IllegalArgumentException("byteCount must be positive.");
 		return new SQLType<>("VARBINARY(" + byteCount + ")", byte[].class);
 	}
 
 	public static final SQLType<byte[]> BLOB = new SQLType<>("BLOB", byte[].class);
 
-	public static final <T extends Enum<T>> SQLType<T> ENUM(Class<T> enumType) {
+	public static <T extends Enum<T>> SQLType<T> ENUM(Class<T> enumType) {
 		if (enumType == null) throw new IllegalArgumentException("enumType can't be null.");
-		String enumStr = "'";
+		StringBuilder enumStr = new StringBuilder("'");
 		boolean first = true;
 		for (T el : enumType.getEnumConstants()) {
-			if (!first) enumStr += "', '";
+			if (!first) enumStr.append("', '");
 			first = false;
-			enumStr += el.name();
+			enumStr.append(el.name());
 
 		}
-		enumStr += "'";
+		enumStr.append("'");
 
 		return new SQLCustomType<>("VARCHAR(" + enumStr + ")", String.class, enumType, s -> EnumUtil.searchEnum(enumType, s), Enum::name);
 	}

Core/src/main/java/fr/pandacube/lib/core/db/SQLElementList.java

@@ -1,25 +1,23 @@
 package fr.pandacube.lib.core.db;
 
-import java.sql.SQLException;
+import com.google.gson.JsonArray;
+import fr.pandacube.lib.core.util.Log;
+
 import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.HashSet;
 import java.util.LinkedHashMap;
 import java.util.List;
 import java.util.Map;
+import java.util.Objects;
 import java.util.Set;
 import java.util.stream.Collectors;
 
-import com.google.gson.JsonArray;
-
-import fr.pandacube.lib.core.util.Log;
-
 /**
  *
  * @param <E>
  */
 public class SQLElementList<E extends SQLElement<E>> extends ArrayList<E> {
-	private static final long serialVersionUID = 1L;
 
 	private final Map<SQLField<E, ?>, Object> modifiedValues = new LinkedHashMap<>();
 
@@ -38,14 +36,13 @@ public class SQLElementList<E extends SQLElement<E>> extends ArrayList<E> {
 	 * que lors de
 	 * l'appel à {@link #saveCommon()}
 	 *
-	 * @param <T>
 	 * @param field le champs à modifier
 	 * @param value la valeur à lui appliquer
 	 */
 	public synchronized <T> void setCommon(SQLField<E, T> field, T value) {
 		if (field == null)
 			throw new IllegalArgumentException("field can't be null");
-		if (field.getName() == "id")
+		if (Objects.equals(field.getName(), "id"))
 			throw new IllegalArgumentException("Can't modify id field in a SQLElementList");
 		
 		Class<E> elemClass = field.getSQLElementType();
@@ -72,8 +69,6 @@ public class SQLElementList<E extends SQLElement<E>> extends ArrayList<E> {
 	 * {@link SQLElement#set(SQLField, Object)}.<br/>
 	 * Les objets de cette liste qui n'ont pas leur données en base de données
 	 * sont ignorées.
-	 *
-	 * @throws SQLException
 	 */
 	public synchronized int saveCommon() throws DBException {
 		List<E> storedEl = getStoredEl();
@@ -102,7 +97,7 @@ public class SQLElementList<E extends SQLElement<E>> extends ArrayList<E> {
 	}
 
 	private List<E> getStoredEl() {
-		return stream().filter(SQLElement::isStored).collect(Collectors.toCollection(() -> new ArrayList<>()));
+		return stream().filter(SQLElement::isStored).collect(Collectors.toCollection(ArrayList::new));
 	}
 
 	/**

Core/src/main/java/fr/pandacube/lib/core/db/SQLField.java

@@ -63,7 +63,7 @@ public class SQLField<E extends SQLElement<E>, T> {
 	}
 
 	/**
-	 * <b>Don't use this {@link #toString()} method in a SQL query, because
+	 * <b>Don't use this {@code toString()} method in a SQL query, because
 	 * the default value is not escaped correctly</b>
 	 *
 	 * @see java.lang.Object#toString()
@@ -76,12 +76,9 @@ public class SQLField<E extends SQLElement<E>, T> {
 
 	@Override
 	public boolean equals(Object obj) {
-		if (obj == null) return false;
+		return obj instanceof SQLField<?, ?> f
-		if (!(obj instanceof SQLField)) return false;
+				&& f.getName().equals(getName())
-		SQLField<?, ?> f = (SQLField<?, ?>) obj;
+				&& f.sqlElemClass.equals(sqlElemClass);
-		if (!f.getName().equals(getName())) return false;
-		if (!f.sqlElemClass.equals(sqlElemClass)) return false;
-		return true;
 	}
 
 	@Override

Core/src/main/java/fr/pandacube/lib/core/db/SQLOrderBy.java

@@ -2,10 +2,11 @@ package fr.pandacube.lib.core.db;
 
 import java.util.ArrayList;
 import java.util.List;
+import java.util.stream.Collectors;
 
 public class SQLOrderBy<E extends SQLElement<E>> {
 
-	private List<OBField> orderByFields = new ArrayList<>();
+	private final List<OBField> orderByFields = new ArrayList<>();
 
 	/**
 	 * Construit une nouvelle clause ORDER BY
@@ -45,14 +46,9 @@ public class SQLOrderBy<E extends SQLElement<E>> {
 	}
 
 	/* package */ String toSQL() {
-		String ret = "";
+		return orderByFields.stream()
-		boolean first = true;
+				.map(f -> "`" + f.field.getName() + "` " + f.direction.name())
-		for (OBField f : orderByFields) {
+				.collect(Collectors.joining(", "));
-			if (!first) ret += ", ";
-			first = false;
-			ret += "`" + f.field.getName() + "` " + f.direction.name();
-		}
-		return ret;
 	}
 
 	@Override
@@ -72,7 +68,7 @@ public class SQLOrderBy<E extends SQLElement<E>> {
 	}
 
 	private enum Direction {
-		ASC, DESC;
+		ASC, DESC
 	}
 	
 	

Core/src/main/java/fr/pandacube/lib/core/db/SQLType.java

@@ -15,9 +15,8 @@ public class SQLType<T> {
 		return sqlDeclaration;
 	}
 
-	public boolean isAssignableFrom(Object val) {
+	public boolean isInstance(Object val) {
-		if (javaTypes.isInstance(val)) return true;
+		return javaTypes.isInstance(val);
-		return false;
 	}
 
 	@Override
@@ -27,8 +26,8 @@ public class SQLType<T> {
 
 	@Override
 	public boolean equals(Object obj) {
-		if (obj == null || !(obj instanceof SQLType)) return false;
+		return obj instanceof SQLType o
-		return toString().equals(((SQLType<?>) obj).toString());
+				&& toString().equals(o.toString());
 	}
 
 	public Class<T> getJavaType() {

Core/src/main/java/fr/pandacube/lib/core/db/SQLUpdate.java

@@ -42,27 +42,27 @@ public class SQLUpdate<E extends SQLElement<E>> {
 			return 0;
 		}
 
-		String sql = "UPDATE " + DB.getTableName(elemClass) + " SET ";
+		StringBuilder sql = new StringBuilder("UPDATE " + DB.getTableName(elemClass) + " SET ");
 		List<Object> params = new ArrayList<>();
 
 		boolean first = true;
 		for (Map.Entry<SQLField<E, ?>, Object> entry : values.entrySet()) {
 			if (!first)
-				sql += ", ";
+				sql.append(", ");
-			sql += "`" + entry.getKey().getName() + "` = ? ";
+			sql.append("`").append(entry.getKey().getName()).append("` = ? ");
 			SQLElement.addValueToSQLObjectList(params, entry.getKey(), entry.getValue());
 			first = false;
 		}
 
 		if (where != null) {
 			ParameterizedSQLString ret = where.toSQL();
-			sql += " WHERE " + ret.sqlString();
+			sql.append(" WHERE ").append(ret.sqlString());
 			params.addAll(ret.parameters());
 		}
 		
-		sql += ";";
+		sql.append(";");
 		
-		return DB.customUpdateStatement(sql, params);
+		return DB.customUpdateStatement(sql.toString(), params);
 	}
 
 }

Core/src/main/java/fr/pandacube/lib/core/db/SQLWhere.java

@@ -50,8 +50,8 @@ public abstract class SQLWhere<E extends SQLElement<E>> {
 	
 	public static abstract class SQLWhereChain<E extends SQLElement<E>> extends SQLWhere<E> {
 
-		private SQLBoolOp operator;
+		private final SQLBoolOp operator;
-		protected List<SQLWhere<E>> conditions = new ArrayList<>();
+		private final List<SQLWhere<E>> conditions = new ArrayList<>();
 
 		private SQLWhereChain(SQLBoolOp op) {
 			if (op == null) throw new IllegalArgumentException("op can't be null");
@@ -73,20 +73,21 @@ public abstract class SQLWhere<E extends SQLElement<E>> {
 				throw new DBException("SQLWhereChain needs at least one element inside !");
 			}
 			
-			String sql = "";
+			StringBuilder sql = new StringBuilder();
 			List<Object> params = new ArrayList<>();
 			boolean first = true;
 
 			for (SQLWhere<E> w : conditions) {
-				if (!first) sql += " " + operator.sql + " ";
+				if (!first)
+					sql.append(" ").append(operator.sql).append(" ");
 				first = false;
 
 				ParameterizedSQLString ret = w.toSQL();
-				sql += "(" + ret.sqlString() + ")";
+				sql.append("(").append(ret.sqlString()).append(")");
 				params.addAll(ret.parameters());
 			}
 
-			return new ParameterizedSQLString(sql, params);
+			return new ParameterizedSQLString(sql.toString(), params);
 		}
 
 		protected enum SQLBoolOp {
@@ -96,7 +97,7 @@ public abstract class SQLWhere<E extends SQLElement<E>> {
 			OR("OR");
 			/* package */ final String sql;
 
-			private SQLBoolOp(String s) {
+			SQLBoolOp(String s) {
 				sql = s;
 			}
 
@@ -151,9 +152,9 @@ public abstract class SQLWhere<E extends SQLElement<E>> {
 	
 	/* package */ static class SQLWhereComp<E extends SQLElement<E>> extends SQLWhere<E> {
 
-		private SQLField<E, ?> left;
+		private final SQLField<E, ?> left;
-		private SQLComparator comp;
+		private final SQLComparator comp;
-		private Object right;
+		private final Object right;
 
 		/**
 		 * Compare a field with a value
@@ -193,7 +194,7 @@ public abstract class SQLWhere<E extends SQLElement<E>> {
 
 			/* package */ final String sql;
 
-			private SQLComparator(String s) {
+			SQLComparator(String s) {
 				sql = s;
 			}
 
@@ -208,8 +209,8 @@ public abstract class SQLWhere<E extends SQLElement<E>> {
 	
 	/* package */ static class SQLWhereIn<E extends SQLElement<E>> extends SQLWhere<E> {
 
-		private SQLField<E, ?> field;
+		private final SQLField<E, ?> field;
-		private Collection<?> values;
+		private final Collection<?> values;
 
 		/* package */ <T> SQLWhereIn(SQLField<E, T> f, Collection<T> v) {
 			if (f == null || v == null)
@@ -246,8 +247,8 @@ public abstract class SQLWhere<E extends SQLElement<E>> {
 	
 	/* package */ static class SQLWhereLike<E extends SQLElement<E>> extends SQLWhere<E> {
 
-		private SQLField<E, ?> field;
+		private final SQLField<E, ?> field;
-		private String likeExpr;
+		private final String likeExpr;
 
 		/**
 		 * Compare a field with a value
@@ -279,8 +280,8 @@ public abstract class SQLWhere<E extends SQLElement<E>> {
 	
 	/* package */ static class SQLWhereNull<E extends SQLElement<E>> extends SQLWhere<E> {
 
-		private SQLField<E, ?> fild;
+		private final SQLField<E, ?> field;
-		private boolean nulll;
+		private final boolean isNull;
 
 		/**
 		 * Init a IS NULL / IS NOT NULL expression for a SQL WHERE condition.
@@ -294,13 +295,13 @@ public abstract class SQLWhere<E extends SQLElement<E>> {
 			if (!field.canBeNull) Log.getLogger().log(Level.WARNING,
 					"Useless : Trying to check IS [NOT] NULL on the field " + field.getSQLElementType().getName() + "#"
 							+ field.getName() + " which is declared in the ORM as 'can't be null'");
-			fild = field;
+			this.field = field;
-			nulll = isNull;
+			this.isNull = isNull;
 		}
 
 		@Override
 		public ParameterizedSQLString toSQL() {
-			return new ParameterizedSQLString("`" + fild.getName() + "` IS " + ((nulll) ? "NULL" : "NOT NULL"), new ArrayList<>());
+			return new ParameterizedSQLString("`" + field.getName() + "` IS " + ((isNull) ? "NULL" : "NOT NULL"), new ArrayList<>());
 		}
 
 	}

Core/src/main/java/fr/pandacube/lib/core/net/Array8Bit.java

@@ -23,8 +23,6 @@ public class Array8Bit {
 	
 	/**
 	 * i = 0 is the lowest significant bit
-	 * @param i
-	 * @return
 	 */
 	public boolean getBit(int i) {
 		return values[i];
@@ -32,8 +30,6 @@ public class Array8Bit {
 	
 	/**
 	 * i = 0 is the lowest significant bit
-	 * @param i
-	 * @param b
 	 */
 	public void setBit(int i, boolean b) {
 		values[i] = b;

Core/src/main/java/fr/pandacube/lib/core/net/ByteBuffer.java

@@ -1,13 +1,14 @@
 package fr.pandacube.lib.core.net;
 
 import java.nio.charset.Charset;
+import java.nio.charset.StandardCharsets;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
 
 public final class ByteBuffer implements Cloneable {
 
-	public static final Charset NETWORK_CHARSET = Charset.forName("UTF-8");
+	public static final Charset NETWORK_CHARSET = StandardCharsets.UTF_8;
 
 	private java.nio.ByteBuffer buff;
 
@@ -64,7 +65,6 @@ public final class ByteBuffer implements Cloneable {
 	/**
 	 * Return the next byte array wich is preceded with his size as integer,
 	 * or null if the founded size is negative.
-	 * @return
 	 */
 	public byte[] getSizedByteArray() {
 		int size = getInt();
@@ -218,7 +218,6 @@ public final class ByteBuffer implements Cloneable {
 	/**
 	 * 
 	 * @param s null String are supported
-	 * @return
 	 */
 	public ByteBuffer putString(String s) {
 		if (s == null) {
@@ -229,7 +228,6 @@ public final class ByteBuffer implements Cloneable {
 
 	/**
 	 * returned string can be null
-	 * @return
 	 */
 	public String getString() {
 		byte[] binaryString = getSizedByteArray();
@@ -239,7 +237,6 @@ public final class ByteBuffer implements Cloneable {
 	/**
 	 * 
 	 * @param list The list can be null, and any String can be null too.
-	 * @return
 	 */
 	public ByteBuffer putListOfString(List<String> list) {
 		if (list == null) {

Core/src/main/java/fr/pandacube/lib/core/net/PPacket.java

@@ -3,9 +3,9 @@ package fr.pandacube.lib.core.net;
 import java.util.Arrays;
 
 public class PPacket {
-	public String name;
+	public final String name;
 	/* package */ int id;
-	public byte[] content;
+	public final byte[] content;
 	
 	/**
 	 * Construct a new PPacket based on the content of the provided buffer before his position.

Core/src/main/java/fr/pandacube/lib/core/net/PPacketAnswer.java

@@ -3,7 +3,7 @@ package fr.pandacube.lib.core.net;
 import java.util.Arrays;
 
 public class PPacketAnswer extends PPacket {
-	/* package */ int answer;
+	/* package */ final int answer;
 
 	/**
 	 * Construct a new PPacketAnswer based on the content of the provided buffer before his position.

Core/src/main/java/fr/pandacube/lib/core/net/PPacketListener.java

@@ -8,6 +8,6 @@ public interface PPacketListener<P extends PPacket> {
 	 * @param connection the connection from where the packet comes
 	 * @param packet the received packet
 	 */
-	public void onPacketReceive(PSocket connection, P packet);
+	void onPacketReceive(PSocket connection, P packet);
 
 }

Core/src/main/java/fr/pandacube/lib/core/net/PServer.java

@@ -17,25 +17,25 @@ import com.google.common.base.MoreObjects;
 import fr.pandacube.lib.core.util.Log;
 
 public class PServer extends Thread implements Closeable {
-	private static AtomicInteger connectionCounterId = new AtomicInteger(0);
+	private static final AtomicInteger connectionCounterId = new AtomicInteger(0);
 
-	private int port;
+	private final int port;
 	private ServerSocket socket;
-	private String socketName;
+	private final String socketName;
 
-	private List<TCPServerClientConnection> clients = Collections.synchronizedList(new ArrayList<>());
+	private final List<TCPServerClientConnection> clients = Collections.synchronizedList(new ArrayList<>());
 
-	private AtomicBoolean isClosed = new AtomicBoolean(false);
+	private final AtomicBoolean isClosed = new AtomicBoolean(false);
 	
 
-	private List<PPacketListener<PPacket>> globalPacketListeners = Collections.synchronizedList(new ArrayList<>());
+	private final List<PPacketListener<PPacket>> globalPacketListeners = Collections.synchronizedList(new ArrayList<>());
-	private List<PSocketConnectionListener> clientConnectionListeners = Collections.synchronizedList(new ArrayList<>());
+	private final List<PSocketConnectionListener> clientConnectionListeners = Collections.synchronizedList(new ArrayList<>());
 	
 	
 	
-	private String password;
+	private final String password;
 
-	public PServer(int port, String sckName, String password) throws IOException {
+	public PServer(int port, String sckName, String password) {
 		super("PServer " + sckName);
 		setDaemon(true);
 		if (port <= 0 || port > 65535) throw new IllegalArgumentException("le numéro de port est invalide");
@@ -59,17 +59,11 @@ public class PServer extends Thread implements Closeable {
 				socketClient.setSendBufferSize(PSocket.NETWORK_TCP_BUFFER_SIZE);
 				socketClient.setSoTimeout(PSocket.NETWORK_TIMEOUT);
 
-				try {
+				TCPServerClientConnection co = new TCPServerClientConnection(socketClient,
-					@SuppressWarnings("resource")
+						connectionCounterId.getAndIncrement());
-					TCPServerClientConnection co = new TCPServerClientConnection(socketClient,
+				co.start();
-							connectionCounterId.getAndIncrement());
-					co.start();
-				} catch (IOException e) {
-					Log.severe("Connexion impossible avec " + socketClient.getInetAddress());
-				}
 			}
-		} catch(SocketException e) {
+		} catch (SocketException ignored) {
-			
 		} catch (Exception e) {
 			Log.warning("Plus aucune connexion ne peux être acceptée", e);
 		}
@@ -97,7 +91,7 @@ public class PServer extends Thread implements Closeable {
 		
 		boolean loggedIn;
 
-		private TCPServerClientConnection(Socket s, int coId) throws IOException {
+		private TCPServerClientConnection(Socket s, int coId) {
 			super(s, "Conn#" + coId + " via TCPSv " + socketName, password);
 			addConnectionListener(new PSocketConnectionListener() {
 				@Override
@@ -114,16 +108,16 @@ public class PServer extends Thread implements Closeable {
 					clientConnectionListeners.forEach(l -> l.onConnect(connection));
 				}
 			});
-			addPacketListener((conn, packet) -> {
+			addPacketListener((conn, packet) ->
-				globalPacketListeners.forEach(l -> {
+					globalPacketListeners.forEach(l -> {
-					try {
+						try {
-						l.onPacketReceive(conn, packet);
+							l.onPacketReceive(conn, packet);
-					} catch (Exception e) {
+						} catch (Exception e) {
-						Log.severe("Exception while calling PPacketListener.onPacketReceive().", e);
+							Log.severe("Exception while calling PPacketListener.onPacketReceive().", e);
-						sendSilently(PPacketAnswer.buildExceptionPacket(packet, e.toString()));
+							sendSilently(PPacketAnswer.buildExceptionPacket(packet, e.toString()));
-					}
+						}
-				});
+					})
-			});
+			);
 		}
 
 	}
@@ -137,7 +131,7 @@ public class PServer extends Thread implements Closeable {
 			clients.forEach(PSocket::close);
 
 			socket.close();
-		} catch (IOException e) {}
+		} catch (IOException ignored) {}
 	}
 
 	public boolean isClosed() {

Core/src/main/java/fr/pandacube/lib/core/net/PSocket.java

@@ -40,17 +40,17 @@ public class PSocket extends Thread implements Closeable {
 
 	private boolean server = false;
 	private Socket socket;
-	private SocketAddress addr;
+	private final SocketAddress addr;
 	private DataInputStream in;
 	private DataOutputStream out;
-	private Object outSynchronizer = new Object();
+	private final Object outSynchronizer = new Object();
 	private String password;
 	
-	private AtomicBoolean isClosed = new AtomicBoolean(false);
+	private final AtomicBoolean isClosed = new AtomicBoolean(false);
 
-	private List<PPacketListener<PPacket>> packetListeners = Collections.synchronizedList(new ArrayList<>());
+	private final List<PPacketListener<PPacket>> packetListeners = Collections.synchronizedList(new ArrayList<>());
-	private List<PSocketConnectionListener> connectionListeners = Collections.synchronizedList(new ArrayList<>());
+	private final List<PSocketConnectionListener> connectionListeners = Collections.synchronizedList(new ArrayList<>());
-	private Map<Integer, PPacketListener<PPacketAnswer>> answersCallbacks = Collections.synchronizedMap(new HashMap<>());
+	private final Map<Integer, PPacketListener<PPacketAnswer>> answersCallbacks = Collections.synchronizedMap(new HashMap<>());
 	
 	private int nextSendId = 0;
 
@@ -58,7 +58,7 @@ public class PSocket extends Thread implements Closeable {
 	 * Create a new PSocket that will connect to the specified SocketAddress.
 	 * @param a The target server to connect to
 	 * @param connName the name of the connection, used to name the Thread used to receive the packet.
-	 * @param the password to send to the server.
+	 * @param pass the password to send to the server.
 	 */
 	public PSocket(SocketAddress a, String connName, String pass) {
 		super("PSocket " + connName);
@@ -115,7 +115,6 @@ public class PSocket extends Thread implements Closeable {
 				}
 				send(PPacketAnswer.buildLoginOkPacket(packet));
 				// login ok at this point
-				password = null;
 			}
 			else {
 				send(PPacket.buildLoginPacket(password));
@@ -136,9 +135,9 @@ public class PSocket extends Thread implements Closeable {
 					return;
 				}
 				// login ok at this point
-				password = null;
 			}
-			
+			password = null;
+
 			socket.setSoTimeout(NETWORK_TIMEOUT);
 			
 			Log.info(getName() + " connected.");
@@ -189,7 +188,6 @@ public class PSocket extends Thread implements Closeable {
 	/**
 	 * Return the packet read in the socket, or null if the packet is in a bad format.
 	 * @return the packet
-	 * @throws IOException
 	 * 
 	 */
 	private PPacket readPacket() throws IOException {
@@ -232,8 +230,6 @@ public class PSocket extends Thread implements Closeable {
 	
 	/**
 	 * Send the provided packet, without waiting for an answer.
-	 * @param packet
-	 * @throws IOException
 	 */
 	public void send(PPacket packet) throws IOException {
 		if (packet == null)
@@ -271,7 +267,7 @@ public class PSocket extends Thread implements Closeable {
 	public void sendSilently(PPacket packet) {
 		try {
 			send(packet);
-		} catch (IOException e) {}
+		} catch (IOException ignored) {}
 	}
 	
 	

Core/src/main/java/fr/pandacube/lib/core/net/PSocketConnectionListener.java

@@ -6,12 +6,12 @@ public interface PSocketConnectionListener {
 	 * Called when a socket is connected
 	 * @param connection the connection
 	 */
-	public void onConnect(PSocket connection);
+	void onConnect(PSocket connection);
 	
 	/**
 	 * Called just before a socket is disconnected
 	 * @param connection the connection
 	 */
-	public void onDisconnect(PSocket connection);
+	void onDisconnect(PSocket connection);
 
 }

Core/src/main/java/fr/pandacube/lib/core/network_api/client/AbstractRequest.java

@@ -6,7 +6,7 @@ import java.io.PrintStream;
 public abstract class AbstractRequest {
 
 	private final String pass;
-	private String command;
+	private final String command;
 	private String data;
 
 	protected AbstractRequest(String cmd, String p) {

Core/src/main/java/fr/pandacube/lib/core/network_api/client/ResponseAnalyser.java

@@ -35,7 +35,7 @@ public class ResponseAnalyser {
 		if (line == null)
 			throw new IOException("Not enough data to read second line of response.");
 
-		int data_size = 0;
+		int data_size;
 		try {
 			data_size = Integer.parseInt(line);
 		} catch (NumberFormatException e) {
@@ -45,7 +45,7 @@ public class ResponseAnalyser {
 		// lecture du reste
 		StringBuilder sB_data = new StringBuilder();
 		char[] c = new char[100];
-		int nbC = 0;
+		int nbC;
 		while ((nbC = in.read(c)) != -1)
 			sB_data.append(c, 0, nbC);
 		data = sB_data.toString();

Core/src/main/java/fr/pandacube/lib/core/network_api/server/NetworkAPIListener.java

@@ -10,11 +10,11 @@ import fr.pandacube.lib.core.util.Log;
 @Deprecated
 public class NetworkAPIListener implements Runnable {
 
-	private int port = 0;
+	private final int port;
-	String pass;
+	final String pass;
 	private ServerSocket serverSocket;
-	private HashMap<String, AbstractRequestExecutor> requestExecutors = new HashMap<>();
+	private final HashMap<String, AbstractRequestExecutor> requestExecutors = new HashMap<>();
-	private String name;
+	private final String name;
 
 	/**
 	 * Instencie le côté serveur du NetworkAPI
@@ -22,8 +22,6 @@ public class NetworkAPIListener implements Runnable {
 	 * @param n nom du networkAPI (permet l'identification dans les logs)
 	 * @param p le port d'écoute
 	 * @param pa le mot de passe réseau
-	 * @param peh PacketExecutionHandler permettant de prendre en charge
-	 *        l'exécution asynchrone d'une requête reçu pas un client
 	 */
 	public NetworkAPIListener(String n, int p, String pa) {
 		port = p;
@@ -51,12 +49,13 @@ public class NetworkAPIListener implements Runnable {
 				t.setDaemon(true);
 				t.start();
 			}
-		} catch (IOException e) {}
+		} catch (IOException ignored) {}
 
 		synchronized (this) {
 			try {
-				if (!serverSocket.isClosed()) serverSocket.close();
+				if (!serverSocket.isClosed())
-			} catch (IOException e) {}
+					serverSocket.close();
+			} catch (IOException ignored) {}
 		}
 
 		Log.info("NetworkAPI '" + name + "' ferme le port " + port);
@@ -70,7 +69,7 @@ public class NetworkAPIListener implements Runnable {
 	public synchronized void closeServerSocket() {
 		if (serverSocket != null) try {
 			serverSocket.close();
-		} catch (IOException e) {}
+		} catch (IOException ignored) {}
 	}
 
 	public int getPort() {

Core/src/main/java/fr/pandacube/lib/core/network_api/server/PacketExecutor.java

@@ -18,8 +18,8 @@ import fr.pandacube.lib.core.util.Log;
  */
 @Deprecated
 public class PacketExecutor implements Runnable {
-	private Socket socket;
+	private final Socket socket;
-	private NetworkAPIListener networkAPIListener;
+	private final NetworkAPIListener networkAPIListener;
 
 	public PacketExecutor(Socket s, NetworkAPIListener napiListener) {
 		socket = s;
@@ -43,9 +43,9 @@ public class PacketExecutor implements Runnable {
 			rep.data = e.toString();
 			try {
 				rep.sendPacket(new PrintStream(socket.getOutputStream()));
-			} catch (IOException e1) {}
+			} catch (IOException ignored) {}
 			if (e instanceof IOException)
-				Log.warning("Unable to read packet from socket " + socket + ": " + e.toString());
+				Log.warning("Unable to read packet from socket " + socket + ": " + e);
 			else if(e instanceof BadRequestException) {
 				if (e.getMessage().equals("wrong_password"))
 					Log.warning("Wrong password received from socket " + socket);
@@ -60,6 +60,6 @@ public class PacketExecutor implements Runnable {
 
 		try {
 			socket.close();
-		} catch (Exception e) {}
+		} catch (Exception ignored) {}
 	}
 }

Core/src/main/java/fr/pandacube/lib/core/network_api/server/RequestAnalyser.java

@@ -8,7 +8,6 @@ import java.net.Socket;
 @Deprecated
 public class RequestAnalyser {
 
-	private NetworkAPIListener networkAPIListener;
 	public final String command;
 	public final String data;
 
@@ -17,8 +16,6 @@ public class RequestAnalyser {
 			throw new IllegalArgumentException(
 					"le socket doit être non null et doit être ouvert sur le flux d'entrée et napiListener ne doit pas être null");
 
-		networkAPIListener = napiListener;
-
 		// on lis la réponse
 		BufferedReader in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
 
@@ -26,18 +23,18 @@ public class RequestAnalyser {
 
 		// lecture de la première ligne
 		line = in.readLine();
-		if (line == null || !line.equals(networkAPIListener.pass)) throw new BadRequestException("wrong_password");
+		if (line == null || !line.equals(napiListener.pass)) throw new BadRequestException("wrong_password");
 
 		// lecture de la deuxième ligne
 		line = in.readLine();
-		if (line == null || networkAPIListener.getRequestExecutor(line) == null)
+		if (line == null || napiListener.getRequestExecutor(line) == null)
 			throw new BadRequestException("command_not_exists");
 		command = line;
 
 		// lecture de la troisième ligne
 		line = in.readLine();
 
-		int data_size = 0;
+		int data_size;
 		try {
 			data_size = Integer.parseInt(line);
 		} catch (NumberFormatException e) {
@@ -47,7 +44,7 @@ public class RequestAnalyser {
 		// lecture du reste
 		StringBuilder sB_data = new StringBuilder();
 		char[] c = new char[100];
-		int nbC = 0;
+		int nbC;
 		while ((nbC = in.read(c)) != -1)
 			sB_data.append(c, 0, nbC);
 
@@ -58,9 +55,7 @@ public class RequestAnalyser {
 		socket.shutdownInput();
 	}
 
-	public class BadRequestException extends Exception {
+	public static class BadRequestException extends Exception {
-
-		private static final long serialVersionUID = 1L;
 
 		public BadRequestException(String message) {
 			super(message);

Core/src/main/java/fr/pandacube/lib/core/permissions/PermEntity.java

@@ -33,12 +33,11 @@ public abstract class PermEntity {
 	 * Tells if the current entity inherits directly or indirectly from the specified group
 	 * @param group the group to search for
 	 * @param recursive true to search in the inheritance tree, or false to search only in the inheritance list of the current entity.
-	 * @return
 	 */
 	public boolean inheritsFromGroup(String group, boolean recursive) {
 		if (group == null)
 			return false;
-		return getInheritances().stream().anyMatch(g -> g.name.equals(group) || (recursive && g.inheritsFromGroup(group, recursive)));
+		return getInheritances().stream().anyMatch(g -> g.name.equals(group) || (recursive && g.inheritsFromGroup(group, true)));
 	}
 	
 	public String getPrefix() {
@@ -105,8 +104,8 @@ public abstract class PermEntity {
 		String prefixWithEndingDot = permissionPrefix.endsWith(".") ? permissionPrefix : (permissionPrefix + ".");
 		int prefixLength = prefixWithEndingDot.length();
 		return listEffectivePermissions(server, world).entrySet().stream()
-				.filter(e -> e.getValue()) // permission must be positive
+				.filter(Map.Entry::getValue) // permission must be positive
-				.map(e -> e.getKey()) // keep only the permission node (key), since the value is always true
+				.map(Map.Entry::getKey) // keep only the permission node (key), since the value is always true
 				.filter(p -> p.startsWith(prefixWithEndingDot)) // keep only relevant permissions
 				.map(p -> p.substring(prefixLength)) // keep only what is after the prefix
 				.map(suffix -> { // convert to long
@@ -117,7 +116,7 @@ public abstract class PermEntity {
 						return null;
 					}
 				})
-				.filter(longSuffix -> longSuffix != null)
+				.filter(Objects::nonNull)
 				.mapToLong(longSuffix -> longSuffix)
 				.sorted();
 	}
@@ -224,10 +223,9 @@ public abstract class PermEntity {
 	
 	@Override
 	public boolean equals(Object obj) {
-		if (obj == null || !(obj instanceof PermEntity))
+		return obj instanceof PermEntity o
-			return false;
+				&& Objects.equals(name, o.name)
-		PermEntity o = (PermEntity) obj;
+				&& type == o.type;
-		return Objects.equals(name, o.name) && type == o.type;
 	}
 	
 	@Override

Core/src/main/java/fr/pandacube/lib/core/permissions/PermPlayer.java

@@ -50,7 +50,6 @@ public class PermPlayer extends PermEntity {
 	
 	/**
 	 * Alias for {@link #getInheritances()}.
-	 * @return
 	 */
 	public List<PermGroup> getGroups() {
 		return getInheritances();
@@ -58,7 +57,6 @@ public class PermPlayer extends PermEntity {
 	
 	/**
 	 * Alias for {@link #getInheritances()}.
-	 * @return
 	 */
 	public List<String> getGroupsString() {
 		return getInheritancesString();
@@ -68,7 +66,6 @@ public class PermPlayer extends PermEntity {
 	 * Tells if the player is directly part of a group.
 	 * This is equivalent to {@link #inheritsFromGroup(String, boolean) inheritsFromGroup(group, false)}
 	 * @param group the group to search for
-	 * @return
 	 */
 	public boolean isInGroup(String group) {
 		return inheritsFromGroup(group, false);

Core/src/main/java/fr/pandacube/lib/core/permissions/Permissions.java

@@ -1,9 +1,11 @@
 package fr.pandacube.lib.core.permissions;
 
+import java.util.Arrays;
 import java.util.List;
 import java.util.UUID;
 
 import fr.pandacube.lib.core.db.DB;
+import fr.pandacube.lib.core.db.DBConnection;
 import fr.pandacube.lib.core.db.DBException;
 import fr.pandacube.lib.core.util.Log;
 
@@ -16,7 +18,6 @@ public class Permissions {
 	/**
 	 * Initialize the permission system.
 	 * The connection to the database needs to be initialized first, using {@link DB#init(DBConnection, String)}.
-	 * @throws DBException
 	 */
 	public static void init() throws DBException {
 		if (backendReader != null)
@@ -38,8 +39,7 @@ public class Permissions {
 		checkInitialized();
 		if (specialPermissions == null)
 			return;
-		for (SpecialPermission sp : specialPermissions)
+		resolver.specialPermissions.addAll(Arrays.asList(specialPermissions));
-			resolver.specialPermissions.add(sp);
 	}
 
 	private static void checkInitialized() {

Core/src/main/java/fr/pandacube/lib/core/permissions/PermissionsBackendWriter.java

@@ -57,22 +57,20 @@ import fr.pandacube.lib.core.permissions.SQLPermissions.EntityType;
 					.and(SQLPermissions.type.eq(EntityType.Group.getCode()))
 					.and(SQLPermissions.key.like("default"))
 					);
-			if (entry == null && !deflt) {
+			if (entry != null) {
-				return;
+				if (deflt) {
+					// update just in case
+					if ("true".equals(entry.get(SQLPermissions.value)))
+						return;
+					entry.set(SQLPermissions.value, "true");
+					entry.save();
+				}
+				else {
+					// delete
+					entry.delete();
+				}
 			}
-			else if (entry != null && deflt) {
+			else if (deflt) {
-				// update
-				if ("true".equals(entry.get(SQLPermissions.value)))
-					return;
-				entry.set(SQLPermissions.value, "true");
-				entry.save();
-				return;
-			}
-			else if (entry != null && !deflt) {
-				// delete
-				entry.delete();
-			}
-			else {
 				// insert
 				addEntry(name, EntityType.Group, "default", "true", null, null);
 			}
@@ -97,20 +95,18 @@ import fr.pandacube.lib.core.permissions.SQLPermissions.EntityType;
 					.and(SQLPermissions.type.eq(type.getCode()))
 					.and(SQLPermissions.key.like("prefix"))
 					);
-			if (entry == null && prefix == null) {
+			if (entry != null) {
-				return;
+				if (prefix != null) {
+					// update
+					entry.set(SQLPermissions.value, prefix);
+					entry.save();
+				}
+				else {
+					// delete
+					entry.delete();
+				}
 			}
-			else if (entry != null && prefix != null) {
+			else if (prefix != null) {
-				// update
-				entry.set(SQLPermissions.value, prefix);
-				entry.save();
-				return;
-			}
-			else if (entry != null && prefix == null) {
-				// delete
-				entry.delete();
-			}
-			else {
 				// insert
 				addEntry(name, type, "prefix", prefix, null, null);
 			}
@@ -130,20 +126,18 @@ import fr.pandacube.lib.core.permissions.SQLPermissions.EntityType;
 					.and(SQLPermissions.type.eq(type.getCode()))
 					.and(SQLPermissions.key.like("suffix"))
 					);
-			if (entry == null && suffix == null) {
+			if (entry != null) {
-				return;
+				if (suffix != null) {
+					// update
+					entry.set(SQLPermissions.value, suffix);
+					entry.save();
+				}
+				else {
+					// delete
+					entry.delete();
+				}
 			}
-			else if (entry != null && suffix != null) {
+			else if (suffix != null) {
-				// update
-				entry.set(SQLPermissions.value, suffix);
-				entry.save();
-				return;
-			}
-			else if (entry != null && suffix == null) {
-				// delete
-				entry.delete();
-			}
-			else {
 				// insert
 				addEntry(name, type, "suffix", suffix, null, null);
 			}
@@ -175,7 +169,7 @@ import fr.pandacube.lib.core.permissions.SQLPermissions.EntityType;
 				throw new IllegalStateException("Inheritance already set");
 			addEntry(name, type, key, inheritance, null, null);
 		} catch (DBException e) {
-			new RuntimeException(e);
+			throw new RuntimeException(e);
 		}
 		
 	}

Core/src/main/java/fr/pandacube/lib/core/permissions/PermissionsCachedBackendReader.java

@@ -29,10 +29,10 @@ import fr.pandacube.lib.core.util.Log;
 	
 	
 	
-	private Cache<UUID, CachedPlayer> usersCache = CacheBuilder.newBuilder()
+	private final Cache<UUID, CachedPlayer> usersCache = CacheBuilder.newBuilder()
 			.expireAfterAccess(10, TimeUnit.MINUTES)
 			.build();
-	private Set<String> fullPermissionsList = new TreeSet<String>();
+	private Set<String> fullPermissionsList = new TreeSet<>();
 	
 	/* package */ synchronized List<String> getFullPermissionsList() {
 		return new ArrayList<>(fullPermissionsList);
@@ -105,14 +105,12 @@ import fr.pandacube.lib.core.util.Log;
 		if (playerRawData.containsKey("groups")) {
 			playerRawData.get("groups").stream()
 					.map(e -> e.get(SQLPermissions.value))
-					.forEach(g -> {
+					.forEach(g -> player.groups.add(getCachedGroup(g)));
-						player.groups.add(getCachedGroup(g));
-					});
 		}
 		
 		if (player.groups.isEmpty()) {
 			player.usingDefaultGroups = true;
-			getDefaultGroups().forEach(player.groups::add);
+			player.groups.addAll(getDefaultGroups());
 		}
 		
 		return player;
@@ -121,7 +119,7 @@ import fr.pandacube.lib.core.util.Log;
 	
 	
 	
-	private Map<String, CachedGroup> groupsCache = new LinkedHashMap<>();
+	private final Map<String, CachedGroup> groupsCache = new LinkedHashMap<>();
 	private boolean cacheIsUpdating = false;
 	
 	
@@ -207,8 +205,7 @@ import fr.pandacube.lib.core.util.Log;
 		Map<String, List<SQLPermissions>> groupRawData = groupsRawData.getOrDefault(groupName, new LinkedHashMap<>());
 
 		boolean groupDefault = groupRawData.containsKey("default")
-				? "true".equals(groupRawData.get("default").get(0).get(SQLPermissions.value))
+				&& "true".equals(groupRawData.get("default").get(0).get(SQLPermissions.value));
-				: false;
 		
 		String groupSelfPrefix = null;
 		if (groupRawData.containsKey("prefix")) {

Core/src/main/java/fr/pandacube/lib/core/permissions/PermissionsResolver.java

@@ -29,7 +29,7 @@ import net.md_5.bungee.api.ChatColor;
 
 public class PermissionsResolver {
 
-	private PermissionsCachedBackendReader backendReader;
+	private final PermissionsCachedBackendReader backendReader;
 	
 	/* package */ PermissionsResolver(PermissionsCachedBackendReader b) {
 		backendReader = b;
@@ -74,7 +74,7 @@ public class PermissionsResolver {
 		return debugData(name, type, DataType.SUFFIX);
 	}
 
-	private Cache<DataCacheKey, String> effectiveDataCache = CacheBuilder.newBuilder()
+	private final Cache<DataCacheKey, String> effectiveDataCache = CacheBuilder.newBuilder()
 			.expireAfterAccess(10, TimeUnit.MINUTES)
 			.build();
 	
@@ -83,9 +83,7 @@ public class PermissionsResolver {
 		Objects.requireNonNull(type, "type can’t be null");
 		
 		try {
-			return effectiveDataCache.get(new DataCacheKey(name, type, dataType), () -> {
+			return effectiveDataCache.get(new DataCacheKey(name, type, dataType), () -> resolveData(name, type, dataType));
-				return resolveData(name, type, dataType);
-			});
 		} catch (ExecutionException e) {
 			Log.severe(e);
 			return null;
@@ -108,7 +106,7 @@ public class PermissionsResolver {
 		if (resolutionResult.conflict) {
 			Log.warning("For data " + dataType + ":\n"
 					+ ChatUtil.treeView(resolutionResult.toDisplayTreeNode(), true).stream()
-					.map(cmp -> cmp.getLegacyText())
+					.map(Chat::getLegacyText)
 					.collect(Collectors.joining(ChatColor.RESET + "\n")));
 		}
 		
@@ -140,7 +138,7 @@ public class PermissionsResolver {
 		
 		Set<String> inheritedPermissions = inheritedResults.stream()
 				.map(g -> g.result)
-				.filter(r -> r != null)
+				.filter(Objects::nonNull)
 				.collect(Collectors.toSet());
 		
 		if (inheritedPermissions.size() == 1)
@@ -176,7 +174,7 @@ public class PermissionsResolver {
 				c.thenFailure(" " + conflictMessage);
 			DisplayTreeNode node = new DisplayTreeNode(c);
 			
-			if (result == null && conflict == false && !inheritances.isEmpty()) {
+			if (result == null && !conflict && !inheritances.isEmpty()) {
 				// there is nothing interesting to show on current or subnode
 				node.children.add(new DisplayTreeNode(Chat.text("(Inheritances hidden for brevety)").darkGray().italic()));
 				return node;
@@ -197,10 +195,8 @@ public class PermissionsResolver {
 		}
 		@Override
 		public boolean equals(Object obj) {
-			if (obj == null || !(obj instanceof DataCacheKey))
+			return obj instanceof DataCacheKey o
-				return false;
+					&& Objects.equals(name, o.name)
-			DataCacheKey o = (DataCacheKey) obj;
-			return Objects.equals(name, o.name)
 					&& Objects.equals(type, o.type)
 					&& dataType == o.dataType;
 		}
@@ -211,7 +207,7 @@ public class PermissionsResolver {
 		SUFFIX(CachedEntity::getSelfSuffix);
 		
 		private final CachedEntityGetter<String> getter;
-		private DataType(CachedEntityGetter<String> g) {
+		DataType(CachedEntityGetter<String> g) {
 			getter = g;
 		}
 	}
@@ -233,7 +229,7 @@ public class PermissionsResolver {
 	
 
 	
-	private Cache<PermCacheKey, Map<String, Boolean>> effectivePermissionsListCache = CacheBuilder.newBuilder()
+	private final Cache<PermCacheKey, Map<String, Boolean>> effectivePermissionsListCache = CacheBuilder.newBuilder()
 			.expireAfterAccess(10, TimeUnit.MINUTES)
 			.build();
 	
@@ -265,7 +261,7 @@ public class PermissionsResolver {
 		
 	}
 
-	private Cache<PermCacheKey, PermState> effectivePermissionsCache = CacheBuilder.newBuilder()
+	private final Cache<PermCacheKey, PermState> effectivePermissionsCache = CacheBuilder.newBuilder()
 			.expireAfterAccess(10, TimeUnit.MINUTES)
 			.build();
 	
@@ -281,14 +277,14 @@ public class PermissionsResolver {
 			reversed = true;
 		}
 		
-		String fPermission = permission == null ? null : permission.toLowerCase();
+		String fPermission = permission.toLowerCase();
 		String fServer = server == null ? null : server.toLowerCase();
 		String fWorld = world == null ? null : world.toLowerCase();
 		try {
-			Boolean resolved = effectivePermissionsCache.get(new PermCacheKey(name, type, fPermission, fServer, fWorld), () -> {
+			Boolean resolved = effectivePermissionsCache.get(new PermCacheKey(name, type, fPermission, fServer, fWorld),
-				return resolvePermission(name, type, fPermission, fServer, fWorld);
+					() -> resolvePermission(name, type, fPermission, fServer, fWorld)
-			}).value;
+			).value;
-			return resolved == null ? null : (reversed != resolved.booleanValue());
+			return resolved == null ? null : (reversed != resolved);
 		} catch (ExecutionException e) {
 			Log.severe(e);
 			return null;
@@ -312,7 +308,7 @@ public class PermissionsResolver {
 		if (resolutionResult.conflict) {
 			Log.warning("For permission " + permission + ":\n"
 					+ ChatUtil.treeView(resolutionResult.toDisplayTreeNode(), true).stream()
-					.map(cmp -> cmp.getLegacyText())
+					.map(Chat::getLegacyText)
 					.collect(Collectors.joining(ChatColor.RESET + "\n")));
 		}
 		
@@ -374,7 +370,7 @@ public class PermissionsResolver {
 		if (inheritancesGranted != inheritancesRevoqued) {
 			resolutionNode.result = inheritancesGranted ? PermState.GRANTED : PermState.REVOQUED;
 		}
-		else if (inheritancesGranted && inheritancesRevoqued) {
+		else if (inheritancesGranted) {
 			resolutionNode.conflictMessage = (resolutionNode.conflictMessage == null ? "" : (resolutionNode.conflictMessage + " ; "))
 					+ "Unsolvable conflict between inheritances";
 			resolutionNode.conflict = true;
@@ -388,7 +384,7 @@ public class PermissionsResolver {
 	
 	
 	
-	/* package */ List<SpecialPermission> specialPermissions = new ArrayList<>();
+	/* package */ final List<SpecialPermission> specialPermissions = new ArrayList<>();
 	
 	
 	
@@ -436,7 +432,7 @@ public class PermissionsResolver {
 							resNode = new ParsedSelfPermission(p, false, PermType.WILDCARD);
 						return resNode;
 					})
-					.filter(p -> p != null)
+					.filter(Objects::nonNull)
 					.collect(Collectors.toList());
 
 				boolean explicitGranted = foundPerms.stream()
@@ -459,13 +455,13 @@ public class PermissionsResolver {
 						conflict = "Unnecessary explicit permission already granted by self wildcard permissions"; // redundent explicit perm
 					}
 				}
-				else if (explicitGranted && explicitRevoqued) {
+				else if (explicitGranted) {
 					conflict = "Unsolvable conflit between explicit permissions";
 				}
 				else if (wildcardGranted != wildcardRevoqued) {
 					result = PermState.of(wildcardGranted);
 				}
-				else if (wildcardGranted && wildcardRevoqued) {
+				else if (wildcardGranted) {
 					conflict = "Unsolvable conflit between wildcard permissions";
 				}
 		}
@@ -505,7 +501,7 @@ public class PermissionsResolver {
 			
 			selfPermissions.forEach(p -> node.children.add(p.toDisplayTreeNode()));
 			
-			if (result == PermState.UNDEFINED && conflict == false && !inheritances.isEmpty()) {
+			if (result == PermState.UNDEFINED && !conflict && !inheritances.isEmpty()) {
 				// there is nothing interesting to show on current or subnode
 				node.children.add(new DisplayTreeNode(Chat.text("(Inheritances hidden for brevety)").darkGray().italic()));
 				return node;
@@ -542,10 +538,8 @@ public class PermissionsResolver {
 		}
 		@Override
 		public boolean equals(Object obj) {
-			if (obj == null || !(obj instanceof PermCacheKey))
+			return obj instanceof PermCacheKey o
-				return false;
+					&& Objects.equals(name, o.name)
-			PermCacheKey o = (PermCacheKey) obj;
-			return Objects.equals(name, o.name)
 					&& Objects.equals(type, o.type)
 					&& Objects.equals(permission, o.permission)
 					&& Objects.equals(server, o.server)
@@ -554,7 +548,7 @@ public class PermissionsResolver {
 	}
 	
 	private enum PermType {
-		EXPLICIT, WILDCARD, SPECIAL;
+		EXPLICIT, WILDCARD, SPECIAL
 	}
 	
 	private enum PermState {
@@ -562,7 +556,7 @@ public class PermissionsResolver {
 		REVOQUED(false),
 		UNDEFINED(null);
 		final Boolean value;
-		private PermState(Boolean v) { value = v; }
+		PermState(Boolean v) { value = v; }
 		private static PermState of(Boolean v) {
 			return v == null ? UNDEFINED : v ? GRANTED : REVOQUED;
 		}

Core/src/main/java/fr/pandacube/lib/core/permissions/ServerWorldKey.java

@@ -10,10 +10,8 @@ public class ServerWorldKey implements Comparable<ServerWorldKey> {
 	}
 	@Override
 	public boolean equals(Object obj) {
-		if (obj == null || !(obj instanceof ServerWorldKey))
+		return obj instanceof ServerWorldKey o
-			return false;
+				&& Objects.equals(server, o.server)
-		ServerWorldKey o = (ServerWorldKey) obj;
-		return Objects.equals(server, o.server)
 				&& Objects.equals(world, o.world);
 	}
 	@Override

Core/src/main/java/fr/pandacube/lib/core/players/IOffPlayer.java

@@ -20,7 +20,7 @@ import fr.pandacube.lib.core.util.Log;
 public interface IOffPlayer {
 
 	/** From how long the last web activity should be before considering the user offline (in ms)? */
-	public static final long TIMEOUT_WEB_SESSION = 10000; // msec
+	long TIMEOUT_WEB_SESSION = 10000; // msec
 	
 	
 	
@@ -34,7 +34,7 @@ public interface IOffPlayer {
 	 * 
 	 * @return the id of the player
 	 */
-	public abstract UUID getUniqueId();
+	UUID getUniqueId();
 
 	
 	/**
@@ -42,7 +42,7 @@ public interface IOffPlayer {
 	 * 
 	 * An alt account uses a specific bit in the UUID to distinguish themselves from the original account.
 	 */
-	public default boolean isAltAccount() {
+	default boolean isAltAccount() {
 		return (getUniqueId().getMostSignificantBits() & 0x8000L) == 0x8000L;
 	}
 
@@ -53,14 +53,14 @@ public interface IOffPlayer {
 	 * 
 	 * This method will return undetermined value if {@link #isAltAccount()} is false.
 	 */
-	public default int getAltIndex() {
+	default int getAltIndex() {
 		return (int) (getUniqueId().getMostSignificantBits() >> 8) & 0xF;
 	}
 
 	/**
 	 * @return the last known player name of this player, or null if this player never joined the network.
 	 */
-	public default String getName() {
+	default String getName() {
 		return PlayerFinder.getLastKnownName(getUniqueId());
 	}
 	
@@ -68,7 +68,7 @@ public interface IOffPlayer {
 	 * Indicate if this player is connected to the current node (server or proxy, depending on interface implementation)
 	 * @return wether the player is online or not
 	 */
-	public abstract boolean isOnline();
+	boolean isOnline();
 	
 	
 	
@@ -80,7 +80,7 @@ public interface IOffPlayer {
 	 * If the player is online in game, it provides the current server they are
 	 * connected.
 	 */
-	public default PlayerStatusOnServer getPlayerStatus() {
+	default PlayerStatusOnServer getPlayerStatus() {
 		
 		IOnlinePlayer op = getOnlineInstance();
 		if (op != null && !op.isVanished())
@@ -103,7 +103,7 @@ public interface IOffPlayer {
 		return new PlayerStatusOnServer(PlayerStatusOnServer.PlayerStatus.OFFLINE, null);
 	}
 	
-	public record PlayerStatusOnServer(PlayerStatus status, String server) {
+	record PlayerStatusOnServer(PlayerStatus status, String server) {
 		public Chat toComponent() {
 			if (status == PlayerStatus.ONLINE_IG)
 				return successText("En ligne, " + server);
@@ -130,12 +130,12 @@ public interface IOffPlayer {
 	 * Floodgate related stuff
 	 */
 	
-	public default boolean isBedrockAccount() {
+	default boolean isBedrockAccount() {
 		int v = getUniqueId().version();
 		return v == 0 || v == 8; // also 8 if one day we supports alt accounts for floodgate players
 	}
 	
-	public default boolean isJavaAccount() {
+	default boolean isJavaAccount() {
 		return !isBedrockAccount();
 	}
 	
@@ -149,13 +149,12 @@ public interface IOffPlayer {
 	 * Return the online instance of this player, if any exists.
 	 * May return itself if the current instance already represent an online player.
 	 */
-	public abstract IOnlinePlayer getOnlineInstance();
+	IOnlinePlayer getOnlineInstance();
 	
 	/**
 	 * Get the database entry of this player, or null if the player never joined the network.
-	 * @throws DBException
 	 */
-	public default SQLPlayer getDbPlayer() throws DBException {
+	default SQLPlayer getDbPlayer() throws DBException {
 		return SQLPlayer.getPlayerFromUUID(getUniqueId());
 	}
 
@@ -163,7 +162,7 @@ public interface IOffPlayer {
 	 * Get the permission instance of this player. This will never return null.
 	 * @return the permission instance of this player 
 	 */
-	public default PermPlayer getPermissionUser() {
+	default PermPlayer getPermissionUser() {
 		return Permissions.getPlayer(getUniqueId());
 	}
 	
@@ -181,15 +180,14 @@ public interface IOffPlayer {
 	 * (and team for bukkit implementation)
 	 * @return the display name of the player
 	 */
-	public abstract String getDisplayName();
+	String getDisplayName();
 
 	/**
 	 * Get an updated display name of the user,
 	 * generated using eventual permission’s prefix(es) and suffix(es) of the player,
 	 * and with color codes translated to Minecraft’s native {@code §}.
-	 * @return 
 	 */
-	public default String getDisplayNameFromPermissionSystem() {
+	default String getDisplayNameFromPermissionSystem() {
 		PermPlayer permU = getPermissionUser();
 		return ChatColorUtil.translateAlternateColorCodes('&',
 				permU.getPrefix() + getName() + permU.getSuffix());
@@ -215,7 +213,7 @@ public interface IOffPlayer {
 	 * @param permission the permission node to test
 	 * @return whether this player has the provided permission
 	 */
-	public default boolean hasPermission(String permission) {
+	default boolean hasPermission(String permission) {
 		IOnlinePlayer online = getOnlineInstance();
 		
 		if (online != null)
@@ -233,10 +231,10 @@ public interface IOffPlayer {
 	 * loop.
 	 * If the player is offline, it just call the Pandacube
 	 * permission system.
-	 * @param permission the permission node to test
+	 * @param permissionExpression the permission node to test
 	 * @return whether this player has the provided permission
 	 */
-	public default boolean hasPermissionExpression(String permissionExpression) {
+	default boolean hasPermissionExpression(String permissionExpression) {
 		IOnlinePlayer online = getOnlineInstance();
 		
 		if (online != null)
@@ -259,7 +257,7 @@ public interface IOffPlayer {
 	 * @param permissionPrefix the permission prefix to search for.
 	 * @return a LongStream containing all the values found for the specified permission prefix.
 	 */
-	public default LongStream getPermissionRangeValues(String permissionPrefix) {
+	default LongStream getPermissionRangeValues(String permissionPrefix) {
 		IOnlinePlayer online = getOnlineInstance();
 		
 		if (online != null)
@@ -272,7 +270,7 @@ public interface IOffPlayer {
 	/**
 	 * Returns the maximum value returned by {@link IOffPlayer#getPermissionRangeValues(String)}.
 	 */
-	public default OptionalLong getPermissionRangeMax(String permissionPrefix) {
+	default OptionalLong getPermissionRangeMax(String permissionPrefix) {
 		IOnlinePlayer online = getOnlineInstance();
 		
 		if (online != null)
@@ -289,14 +287,14 @@ public interface IOffPlayer {
 	 * @return <i>true</i> if this player is part of the group,
 	 *         <i>false</i> otherwise
 	 */
-	public default boolean isInGroup(String group) {
+	default boolean isInGroup(String group) {
 		return getPermissionUser().isInGroup(group);
 	}
 
 	/**
 	 * Tells if this player is part of the staff, based on permission groups
 	 */
-	public default boolean isInStaff() {
+	default boolean isInStaff() {
 		return getPermissionUser().inheritsFromGroup("staff-base", true);
 	}
 	
@@ -315,7 +313,7 @@ public interface IOffPlayer {
 	 * @param ignored the player that is potentially ignored by this player.
 	 *                If this parameter is null, this method returns false.
 	 */
-	public default boolean canIgnore(IOffPlayer ignored) {
+	default boolean canIgnore(IOffPlayer ignored) {
 		if (ignored == null)
 			return false;
 		if (equals(ignored))
@@ -331,7 +329,7 @@ public interface IOffPlayer {
 	 *                If this parameter is null, this method returns false.
 	 * @implNote the default implementation just calls {@link #canIgnore(IOffPlayer) ignorer.canIgnore(this)}.
 	 */
-	public default boolean canBeIgnoredBy(IOffPlayer ignorer) {
+	default boolean canBeIgnoredBy(IOffPlayer ignorer) {
 		if (ignorer == null)
 			return false;
 		return ignorer.canIgnore(this);
@@ -343,7 +341,7 @@ public interface IOffPlayer {
 	 *                If this parameter is null, this method returns false.
 	 * @return true if this player have to right to ignore the provided player and is actually ignoring him.
 	 */
-	public default boolean isIgnoring(IOffPlayer ignored) {
+	default boolean isIgnoring(IOffPlayer ignored) {
 		if (!canIgnore(ignored))
 			return false;
 
@@ -363,7 +361,7 @@ public interface IOffPlayer {
 	 * @return true if the provided player have to right to ignore this player and is actually ignoring him.
 	 * @implNote the default implementation just calls {@link #isIgnoring(IOffPlayer) ignorer.isIgnoring(this)}.
 	 */
-	public default boolean isIgnoredBy(IOffPlayer ignorer) {
+	default boolean isIgnoredBy(IOffPlayer ignorer) {
 		return ignorer.isIgnoring(this);
 	}
 	
@@ -379,7 +377,7 @@ public interface IOffPlayer {
 	 * Retrieve the time when the player will be unmuted, or null if the player is not muted.
 	 * @return the timestamp in millisecond of when the player will be unmuted
 	 */
-	public default Long getMuteTimeout() {
+	default Long getMuteTimeout() {
 		try {
 			Long muteTimeout = getDbPlayer().get(SQLPlayer.muteTimeout);
 			if (muteTimeout == null || muteTimeout <= System.currentTimeMillis())
@@ -394,9 +392,8 @@ public interface IOffPlayer {
 	/**
 	 * Tells if the player is currently muted, meaning that they cannot communicate
 	 * through the chat or private messages.
-	 * @return
 	 */
-	public default boolean isMuted() {
+	default boolean isMuted() {
 		return getMuteTimeout() != null;
 	}
 	
@@ -408,7 +405,7 @@ public interface IOffPlayer {
 	 * Birthday
 	 */
 	
-	public default void setBirthday(int day, int month, Integer year) {
+	default void setBirthday(int day, int month, Integer year) {
 		try {
 			SQLPlayer dbPlayer = getDbPlayer();
 			dbPlayer.setBirthday(day, month, year);
@@ -418,7 +415,7 @@ public interface IOffPlayer {
 		}
 	}
 	
-	public default Calendar getBirthday() {
+	default Calendar getBirthday() {
 		try {
 			return getDbPlayer().getBirthday();
 		} catch (DBException e) {
@@ -434,25 +431,25 @@ public interface IOffPlayer {
 	 * Player config
 	 */
 	
-	public default String getConfig(String key) throws DBException {
+	default String getConfig(String key) throws DBException {
 		return SQLPlayerConfig.get(getUniqueId(), key);
 	}
 	
-	public default String getConfig(String key, String deflt) throws DBException {
+	default String getConfig(String key, String deflt) throws DBException {
 		return SQLPlayerConfig.get(getUniqueId(), key, deflt);
 	}
 	
-	public default void setConfig(String key, String value) throws DBException {
+	default void setConfig(String key, String value) throws DBException {
 		SQLPlayerConfig.set(getUniqueId(), key, value);
 	}
 	
-	public default void unsetConfig(String key) throws DBException {
+	default void unsetConfig(String key) throws DBException {
 		SQLPlayerConfig.unset(getUniqueId(), key);
 	}
 	
-	public default boolean isWelcomeQuizzDone() {
+	default boolean isWelcomeQuizzDone() {
 		try {
-			return Boolean.valueOf(getConfig("welcome.quizz.done", "false"));
+			return Boolean.parseBoolean(getConfig("welcome.quizz.done", "false"));
 		} catch (DBException e) {
 			Log.severe("Error knowing if player has already done the quizz. Assuming they did for now.", e);
 			return true;

Core/src/main/java/fr/pandacube/lib/core/players/IOnlinePlayer.java

@@ -29,11 +29,11 @@ public interface IOnlinePlayer extends IOffPlayer {
 	 * @implSpec The implementation is expected to call the environment API
 	 * (Bukkit/Bungee) to get the name of the player.
 	 */
-	public abstract String getName();
+	String getName();
 	
-	public abstract String getServerName();
+	String getServerName();
 	
-	public abstract String getWorldName();
+	String getWorldName();
 	
 	
 	
@@ -42,7 +42,7 @@ public interface IOnlinePlayer extends IOffPlayer {
 	 * Floodgate related
 	 */
 	
-	public default boolean isBedrockClient() {
+	default boolean isBedrockClient() {
 		try {
 			return FloodgateApi.getInstance().isFloodgatePlayer(getUniqueId());
 		} catch (NoClassDefFoundError e) {
@@ -50,11 +50,11 @@ public interface IOnlinePlayer extends IOffPlayer {
 		}
 	}
 	
-	public default FloodgatePlayer getBedrockClient() {
+	default FloodgatePlayer getBedrockClient() {
 		return FloodgateApi.getInstance().getPlayer(getUniqueId());
 	}
 	
-	public default boolean isJavaClient() {
+	default boolean isJavaClient() {
 		return !isBedrockClient();
 	}
 	
@@ -70,7 +70,7 @@ public interface IOnlinePlayer extends IOffPlayer {
 	 * @throws DBException if a database access error occurs
 	 */
 	@Override
-	public default SQLPlayer getDbPlayer() throws DBException {
+	default SQLPlayer getDbPlayer() throws DBException {
 		SQLPlayer p = SQLPlayer.getPlayerFromUUID(getUniqueId());
 		if (p == null)
 			throw new IllegalStateException("The player was not found in the database: " + getUniqueId());
@@ -93,7 +93,7 @@ public interface IOnlinePlayer extends IOffPlayer {
 	 * indirectly call the method {@link IOffPlayer#hasPermission(String)},
 	 * or it may result in a {@link StackOverflowError}.
 	 */
-	public abstract boolean hasPermission(String permission);
+	boolean hasPermission(String permission);
 
 	/**
 	 * Tells if this online player has the permission resulted from the provided expression.
@@ -101,7 +101,7 @@ public interface IOnlinePlayer extends IOffPlayer {
 	 * indirectly call the method {@link IOffPlayer#hasPermissionExpression(String)},
 	 * or it may result in a {@link StackOverflowError}.
 	 */
-	public abstract boolean hasPermissionExpression(String permission);
+	boolean hasPermissionExpression(String permission);
 
 	/**
 	 * Lists all the values for a set of permission indicating an integer in a range.
@@ -116,12 +116,12 @@ public interface IOnlinePlayer extends IOffPlayer {
 	 * @param permissionPrefix the permission prefix to search for.
 	 * @return a LongStream containing all the values found for the specified permission prefix.
 	 */
-	public abstract LongStream getPermissionRangeValues(String permissionPrefix);
+	LongStream getPermissionRangeValues(String permissionPrefix);
 	
 	/**
 	 * Returns the maximum value returned by {@link IOffPlayer#getPermissionRangeValues(String)}.
 	 */
-	public abstract OptionalLong getPermissionRangeMax(String permissionPrefix);
+	OptionalLong getPermissionRangeMax(String permissionPrefix);
 	
 	
 	
@@ -135,9 +135,9 @@ public interface IOnlinePlayer extends IOffPlayer {
 	 * Vanish
 	 */
 	
-	public abstract boolean isVanished();
+	boolean isVanished();
 	
-	public default boolean isVanishedFor(IOffPlayer other) {
+	default boolean isVanishedFor(IOffPlayer other) {
 		if (!isVanished())
 			return false; // can see unvanished
 		
@@ -168,14 +168,14 @@ public interface IOnlinePlayer extends IOffPlayer {
 	 * the chat is activated.
 	 * @param message the message to display.
 	 */
-	public abstract void sendMessage(Component message);
+	void sendMessage(Component message);
 	
 	/**
 	 * Display the provided message in the player’s chat, if
 	 * the chat is activated.
 	 * @param message the message to display.
 	 */
-	public default void sendMessage(ComponentLike message) {
+	default void sendMessage(ComponentLike message) {
 		sendMessage(message.asComponent());
 	}
 
@@ -184,7 +184,7 @@ public interface IOnlinePlayer extends IOffPlayer {
 	 * the chat is activated
 	 * @param message the message to display
 	 */
-	public default void sendMessage(Chat message) {
+	default void sendMessage(Chat message) {
 		sendMessage(message.getAdv());
 	}
 
@@ -198,7 +198,7 @@ public interface IOnlinePlayer extends IOffPlayer {
 	 * the sender. This parameter is only there to be transmitted to the client, so client side filtering can
 	 * be processed.
 	 */
-	public default void sendMessage(Component message, UUID sender) {
+	default void sendMessage(Component message, UUID sender) {
 		sendMessage(message, () -> sender == null ? Identity.nil() : Identity.identity(sender));
 	}
 
@@ -212,7 +212,7 @@ public interface IOnlinePlayer extends IOffPlayer {
 	 * the sender. This parameter is only there to be transmitted to the client, so client side filtering can
 	 * be processed.
 	 */
-	public abstract void sendMessage(Component message, Identified sender);
+	void sendMessage(Component message, Identified sender);
 
 	/**
 	 * Display the provided message in the player’s chat, if
@@ -221,7 +221,7 @@ public interface IOnlinePlayer extends IOffPlayer {
 	 * @param sender the player causing the send of this message. Client side filtering may occur.
 	 * May be null if we don’t want client filtering, but still consider the message as CHAT message.
 	 */
-	public default void sendMessage(ComponentLike message, UUID sender) {
+	default void sendMessage(ComponentLike message, UUID sender) {
 		sendMessage(message.asComponent(), sender);
 	}
 
@@ -232,7 +232,7 @@ public interface IOnlinePlayer extends IOffPlayer {
 	 * @param sender the player causing the send of this message. Client side filtering may occur.
 	 * May be null if we don’t want client filtering, but still consider the message as CHAT message.
 	 */
-	public default void sendMessage(Chat message, UUID sender) {
+	default void sendMessage(Chat message, UUID sender) {
 		sendMessage(message.getAdv(), sender);
 	}
 	
@@ -241,7 +241,7 @@ public interface IOnlinePlayer extends IOffPlayer {
 	 * activated, prepended with the server prefix.
 	 * @param message the message to display
 	 */
-	public default void sendPrefixedMessage(Component message) {
+	default void sendPrefixedMessage(Component message) {
 		sendMessage(IPlayerManager.prefixedAndColored(message));
 	}
 	
@@ -250,7 +250,7 @@ public interface IOnlinePlayer extends IOffPlayer {
 	 * activated, prepended with the server prefix.
 	 * @param message the message to display
 	 */
-	public default void sendPrefixedMessage(Chat message) {
+	default void sendPrefixedMessage(Chat message) {
 		sendPrefixedMessage(message.getAdv());
 	}
 	
@@ -262,7 +262,7 @@ public interface IOnlinePlayer extends IOffPlayer {
 	 * @param stay Stay time in tick
 	 * @param fadeOut Fade out time in tick
 	 */
-    public abstract void sendTitle(Component title, Component subtitle, int fadeIn, int stay, int fadeOut);
+	void sendTitle(Component title, Component subtitle, int fadeIn, int stay, int fadeOut);
 	
 	/**
 	 * Display a title in the middle of the screen.
@@ -272,7 +272,7 @@ public interface IOnlinePlayer extends IOffPlayer {
 	 * @param stay Stay time in tick
 	 * @param fadeOut Fade out time in tick
 	 */
-    public default void sendTitle(Chat title, Chat subtitle, int fadeIn, int stay, int fadeOut) {
+    default void sendTitle(Chat title, Chat subtitle, int fadeIn, int stay, int fadeOut) {
     	sendTitle(title.getAdv(), subtitle.getAdv(), fadeIn, stay, fadeOut);
     }
 	
@@ -282,7 +282,7 @@ public interface IOnlinePlayer extends IOffPlayer {
      * line break.
      * @param brand the server brand to send to the client.
      */
-	public abstract void sendServerBrand(String brand);
+	void sendServerBrand(String brand);
 	
 	
 	
@@ -297,17 +297,17 @@ public interface IOnlinePlayer extends IOffPlayer {
 	
 
 	
-	public abstract ClientOptions getClientOptions();
+	ClientOptions getClientOptions();
 	
-	public interface ClientOptions {
+	interface ClientOptions {
 		
-		public Locale getLocale();
+		Locale getLocale();
 		
-		public int getViewDistance();
+		int getViewDistance();
 		
 		
 		
-		public boolean hasChatColorEnabled();
+		boolean hasChatColorEnabled();
 		
 		/**
 		 * Tells if the client is configured to completely hide the chat to the
@@ -316,7 +316,7 @@ public interface IOnlinePlayer extends IOffPlayer {
 		 * @implSpec if the value is unknown, it is assumed that the chat is
 		 * fully visible.
 		 */
-		public boolean isChatHidden();
+		boolean isChatHidden();
 
 		/**
 		 * Tells if the client is configured to display the chat normally.
@@ -326,7 +326,7 @@ public interface IOnlinePlayer extends IOffPlayer {
 		 * @implSpec if the value is unknown, it is assumed that the chat is
 		 * fully visible.
 		 */
-		public boolean isChatFullyVisible();
+		boolean isChatFullyVisible();
 
 		/**
 		 * Tells if the client is configured to only display system messages
@@ -336,7 +336,7 @@ public interface IOnlinePlayer extends IOffPlayer {
 		 * @implSpec if the value is unknown, it is assumed that the chat is
 		 * fully visible.
 		 */
-		public boolean isChatOnlyDisplayingSystemMessages();
+		boolean isChatOnlyDisplayingSystemMessages();
 		
 		
 		
@@ -345,44 +345,44 @@ public interface IOnlinePlayer extends IOffPlayer {
 		 * @implSpec if the value is unknown, it is assumed that the main hand
 		 * is on the right.
 		 */
-		public boolean isLeftHanded();
+		boolean isLeftHanded();
 
 		/**
 		 * Tells if the client has configured the main hand on the right.
 		 * @implSpec if the value is unknown, it is assumed that the main hand
 		 * is on the right.
 		 */
-		public boolean isRightHanded();
+		boolean isRightHanded();
 		
 		
 		/**
 		 * Tells if the client has enabled the filtering of texts on sign and book titles.
 		 * Always false as of MC 1.18.
 		 */
-		public boolean isTextFilteringEnabled();
+		boolean isTextFilteringEnabled();
 		
 		
 		/**
 		 * Tells if the client allows the server to list their player name in the
 		 * multiplayer menu.
 		 */
-		public boolean allowsServerListing();
+		boolean allowsServerListing();
 		
 		
 		
-		public boolean hasSkinCapeEnabled();
+		boolean hasSkinCapeEnabled();
 		
-		public boolean hasSkinJacketEnabled();
+		boolean hasSkinJacketEnabled();
 		
-		public boolean hasSkinLeftSleeveEnabled();
+		boolean hasSkinLeftSleeveEnabled();
 		
-		public boolean hasSkinRightSleeveEnabled();
+		boolean hasSkinRightSleeveEnabled();
 		
-		public boolean hasSkinLeftPantsEnabled();
+		boolean hasSkinLeftPantsEnabled();
 		
-		public boolean hasSkinRightPantsEnabled();
+		boolean hasSkinRightPantsEnabled();
 		
-		public boolean hasSkinHatsEnabled();
+		boolean hasSkinHatsEnabled();
 		
 	}
 	
@@ -393,9 +393,8 @@ public interface IOnlinePlayer extends IOffPlayer {
 	 * Chat messages represent public communication between players. By default,
 	 * it only include actual chat message. This method may be used in commands
 	 * like /me, /afk or the login/logout broadcasted messages
-	 * @return
 	 */
-	public default boolean canChat() {
+	default boolean canChat() {
 		return getClientOptions().isChatFullyVisible();
 	}
 	

Core/src/main/java/fr/pandacube/lib/core/players/IPlayerManager.java

@@ -19,6 +19,7 @@ import fr.pandacube.lib.core.db.DB;
 import fr.pandacube.lib.core.db.DBInitTableException;
 import fr.pandacube.lib.core.util.Log;
 import net.kyori.adventure.text.Component;
+import net.kyori.adventure.text.ComponentLike;
 import net.md_5.bungee.api.chat.BaseComponent;
 
 public abstract class IPlayerManager<OP extends IOnlinePlayer, OF extends IOffPlayer> {
@@ -45,11 +46,11 @@ public abstract class IPlayerManager<OP extends IOnlinePlayer, OF extends IOffPl
 	
 	
 	
-	private Map<UUID, OP> onlinePlayers = Collections.synchronizedMap(new HashMap<>());
+	private final Map<UUID, OP> onlinePlayers = Collections.synchronizedMap(new HashMap<>());
 	
-	private LoadingCache<UUID, OF> offlinePlayers = CacheBuilder.newBuilder()
+	private final LoadingCache<UUID, OF> offlinePlayers = CacheBuilder.newBuilder()
 			.expireAfterWrite(10, TimeUnit.MINUTES)
-			.build(CacheLoader.from(pId -> newOffPlayerInstance(pId)));
+			.build(CacheLoader.from(this::newOffPlayerInstance));
 	
 	
 	public IPlayerManager() throws DBInitTableException {
@@ -90,7 +91,7 @@ public abstract class IPlayerManager<OP extends IOnlinePlayer, OF extends IOffPl
 
 	public List<OP> getAllNotVanished() {
 		List<OP> players = getAll();
-		players.removeIf(op -> op.isVanished());
+		players.removeIf(IOnlinePlayer::isVanished);
 		return players;
 	}
 	
@@ -183,8 +184,8 @@ public abstract class IPlayerManager<OP extends IOnlinePlayer, OF extends IOffPl
 	/*
 	 * Message broadcasting
 	 */
-	
+
-	// BaseComponent/Chat/String message
+	// ComponentLike message
 	// boolean prefix
 	// boolean console = (permission == null)
 	// String permission = null
@@ -205,13 +206,13 @@ public abstract class IPlayerManager<OP extends IOnlinePlayer, OF extends IOffPl
 	 * 			
 	 * @throws IllegalArgumentException if message is null.
 	 */
-	public static void broadcast(Component message, boolean prefix, boolean console, String permission, UUID sourcePlayer) {
+	public static void broadcast(ComponentLike message, boolean prefix, boolean console, String permission, UUID sourcePlayer) {
 		Objects.requireNonNull(message, "message cannot be null");
 		
 		IOffPlayer oSourcePlayer = getInstance().getOffline(sourcePlayer);
 		
 		if (prefix)
-			message = prefixedAndColored(message);
+			message = prefixedAndColored(message.asComponent());
 
 		for (IOnlinePlayer op : getInstance().getAll()) {
 			if (permission != null && !(op.hasPermission(permission))) continue;
@@ -231,14 +232,14 @@ public abstract class IPlayerManager<OP extends IOnlinePlayer, OF extends IOffPl
 		}
 
 		if (console)
-			getInstance().sendMessageToConsole(message);
+			getInstance().sendMessageToConsole(message.asComponent());
 	}
 
 	/**
 	 * Broadcast a message to some or all players, and eventually to the console.
 	 * <p>
 	 * This method assumes this message is not caused by a specific player. To specify the source player, use
-	 * {@link #broadcast(BaseComponent, boolean, boolean, String, UUID)}.
+	 * {@link #broadcast(ComponentLike, boolean, boolean, String, UUID)}.
 	 *
 	 * @param message the message to send.
 	 * @param prefix if the server prefix will be prepended to the message.
@@ -246,7 +247,7 @@ public abstract class IPlayerManager<OP extends IOnlinePlayer, OF extends IOffPl
 	 * @param permission if not null, the message is only sent to player with this permission.
 	 * @throws IllegalArgumentException if message is null.
 	 */
-	public static void broadcast(Component message, boolean prefix, boolean console, String permission) {
+	public static void broadcast(ComponentLike message, boolean prefix, boolean console, String permission) {
 		broadcast(message, prefix, console, permission, null);
 	}
 
@@ -254,7 +255,7 @@ public abstract class IPlayerManager<OP extends IOnlinePlayer, OF extends IOffPl
 	 * Broadcast a message to all players, and eventually to the console.
 	 * <p>
 	 * This method does not restrict the reception of the message to a specific permission. If you
-	 * want to specify a permission, use {@link #broadcast(BaseComponent, boolean, boolean, String, UUID)}.
+	 * want to specify a permission, use {@link #broadcast(ComponentLike, boolean, boolean, String, UUID)}.
 	 *
 	 * @param message the message to send.
 	 * @param prefix if the server prefix will be prepended to the message.
@@ -265,7 +266,7 @@ public abstract class IPlayerManager<OP extends IOnlinePlayer, OF extends IOffPl
 	 * 			to players ignoring the provided player.
 	 * @throws IllegalArgumentException if message is null.
 	 */
-	public static void broadcast(Component message, boolean prefix, boolean console, UUID sourcePlayer) {
+	public static void broadcast(ComponentLike message, boolean prefix, boolean console, UUID sourcePlayer) {
 		broadcast(message, prefix, console, null, sourcePlayer);
 	}
 
@@ -273,36 +274,17 @@ public abstract class IPlayerManager<OP extends IOnlinePlayer, OF extends IOffPl
 	 * Broadcast a message to all players, and eventually to the console.
 	 * <p>
 	 * This method does not restrict the reception of the message to a specific permission. If you
-	 * want to specify a permission, use {@link #broadcast(BaseComponent, boolean, boolean, String)}.
+	 * want to specify a permission, use {@link #broadcast(ComponentLike, boolean, boolean, String)}.
 	 * <p>
 	 * This method assumes this message is not caused by a specific player. To specify the source player, use
-	 * {@link #broadcast(BaseComponent, boolean, boolean, UUID)}.
+	 * {@link #broadcast(ComponentLike, boolean, boolean, UUID)}.
 	 *
 	 * @param message the message to send.
 	 * @param prefix if the server prefix will be prepended to the message.
 	 * @param console if the message must be displayed in the console.
 	 * @throws IllegalArgumentException if message is null.
 	 */
-	@Deprecated
+	public static void broadcast(ComponentLike message, boolean prefix, boolean console) {
-	public static void broadcast(BaseComponent message, boolean prefix, boolean console) {
-		broadcast(Chat.toAdventure(message), prefix, console, null, null);
-	}
-
-	/**
-	 * Broadcast a message to all players, and eventually to the console.
-	 * <p>
-	 * This method does not restrict the reception of the message to a specific permission. If you
-	 * want to specify a permission, use {@link #broadcast(BaseComponent, boolean, boolean, String)}.
-	 * <p>
-	 * This method assumes this message is not caused by a specific player. To specify the source player, use
-	 * {@link #broadcast(BaseComponent, boolean, boolean, UUID)}.
-	 *
-	 * @param message the message to send.
-	 * @param prefix if the server prefix will be prepended to the message.
-	 * @param console if the message must be displayed in the console.
-	 * @throws IllegalArgumentException if message is null.
-	 */
-	public static void broadcast(Component message, boolean prefix, boolean console) {
 		broadcast(message, prefix, console, null, null);
 	}
 
@@ -310,11 +292,11 @@ public abstract class IPlayerManager<OP extends IOnlinePlayer, OF extends IOffPl
 	 * Broadcast a message to some or all players, and eventually to the console.
 	 * <p>
 	 * This method assumes this message is not caused by a specific player. To specify the source player, use
-	 * {@link #broadcast(BaseComponent, boolean, String, UUID)}.
+	 * {@link #broadcast(ComponentLike, boolean, String, UUID)}.
 	 * <p>
 	 * This method decides to send the message to the console depending on whether {@code permission}
 	 * is null (will send to console) or not (will not send to console). To specify this behaviour, use
-	 * {@link #broadcast(BaseComponent, boolean, boolean, String)}.
+	 * {@link #broadcast(ComponentLike, boolean, boolean, String)}.
 	 *
 	 * @param message the message to send.
 	 * @param prefix if the server prefix will be prepended to the message.
@@ -322,7 +304,7 @@ public abstract class IPlayerManager<OP extends IOnlinePlayer, OF extends IOffPl
 	 * 			If null, the message will be sent to all players and to console.
 	 * @throws IllegalArgumentException if message is null.
 	 */
-	public static void broadcast(Component message, boolean prefix, String permission) {
+	public static void broadcast(ComponentLike message, boolean prefix, String permission) {
 		broadcast(message, prefix, (permission == null), permission, null);
 	}
 
@@ -330,10 +312,10 @@ public abstract class IPlayerManager<OP extends IOnlinePlayer, OF extends IOffPl
 	 * Broadcast a message to all players, and to the console.
 	 * <p>
 	 * This method does not restrict the reception of the message to a specific permission. If you
-	 * want to specify a permission, use {@link #broadcast(BaseComponent, boolean, String, UUID)}.
+	 * want to specify a permission, use {@link #broadcast(ComponentLike, boolean, String, UUID)}.
 	 * <p>
 	 * This method sends the message to the console. To change this behaviour, use
-	 * {@link #broadcast(BaseComponent, boolean, boolean, UUID)}.
+	 * {@link #broadcast(ComponentLike, boolean, boolean, UUID)}.
 	 *
 	 * @param message the message to send.
 	 * @param prefix if the server prefix will be prepended to the message.
@@ -343,162 +325,46 @@ public abstract class IPlayerManager<OP extends IOnlinePlayer, OF extends IOffPl
 	 * 			to players ignoring the provided player.
 	 * @throws IllegalArgumentException if message is null.
 	 */
-	public static void broadcast(Component message, boolean prefix, UUID sourcePlayer) {
+	public static void broadcast(ComponentLike message, boolean prefix, UUID sourcePlayer) {
 		broadcast(message, prefix, true, null, sourcePlayer);
 	}
-
 	/**
 	 * Broadcast a message to all players, and to the console.
 	 * <p>
-	 * This method assumes this message is not caused by a specific player. To specify the source player, use
-	 * {@link #broadcast(BaseComponent, boolean, UUID)}.
-	 * <p>
-	 * This method does not restrict the reception of the message to a specific permission. If you
-	 * want to specify a permission, use {@link #broadcast(BaseComponent, boolean, String)}.
-	 * <p>
 	 * This method sends the message to the console. To change this behaviour, use
-	 * {@link #broadcast(BaseComponent, boolean, boolean)}.
+	 * {@link #broadcast(ComponentLike, boolean, boolean, String, UUID)}.
-	 *
-	 * @param message the message to send.
-	 * @param prefix if the server prefix will be prepended to the message.
-	 * @throws IllegalArgumentException if message is null.
-	 */
-	public static void broadcast(Component message, boolean prefix) {
-		broadcast(message, prefix, true, null, null);
-	}
-	
-	
-	
-
-	/**
-	 * Broadcast a message to some or all players, and eventually to the console.
-	 *
-	 * @param message the message to send.
-	 * @param prefix if the server prefix will be prepended to the message.
-	 * @param console if the message must be displayed in the console.
-	 * @param permission if not null, the message is only sent to player with this permission.
-	 * @param sourcePlayer specifiy the eventual player that is the source of the message.
-	 * 			If null, the message will be sent as a SYSTEM chat message.
-	 * 			If not null, the message will be sent as a CHAT message, and will not be sent
-	 * 			to players ignoring the provided player.
-	 * @throws IllegalArgumentException if message is null.
-	 */
-	public static void broadcast(Chat message, boolean prefix, boolean console, String permission, UUID sourcePlayer) {
-		Objects.requireNonNull(message, "message cannot be null");
-		broadcast(message.getAdv(), prefix, console, permission, sourcePlayer);
-	}
-
-	/**
-	 * Broadcast a message to some or all players, and eventually to the console.
-	 * <p>
-	 * This method assumes this message is not caused by a specific player. To specify the source player, use
-	 * {@link #broadcast(BaseComponent, boolean, boolean, String, UUID)}.
-	 *
-	 * @param message the message to send.
-	 * @param prefix if the server prefix will be prepended to the message.
-	 * @param console if the message must be displayed in the console.
-	 * @param permission if not null, the message is only sent to player with this permission.
-	 * @throws IllegalArgumentException if message is null.
-	 */
-	public static void broadcast(Chat message, boolean prefix, boolean console, String permission) {
-		broadcast(message, prefix, console, permission, null);
-	}
-
-	/**
-	 * Broadcast a message to all players, and eventually to the console.
-	 * <p>
-	 * This method does not restrict the reception of the message to a specific permission. If you
-	 * want to specify a permission, use {@link #broadcast(BaseComponent, boolean, boolean, String, UUID)}.
-	 *
-	 * @param message the message to send.
-	 * @param prefix if the server prefix will be prepended to the message.
-	 * @param console if the message must be displayed in the console.
-	 * @param sourcePlayer specifiy the eventual player that is the source of the message.
-	 * 			If null, the message will be sent as a SYSTEM chat message.
-	 * 			If not null, the message will be sent as a CHAT message, and will not be sent
-	 * 			to players ignoring the provided player.
-	 * @throws IllegalArgumentException if message is null.
-	 */
-	public static void broadcast(Chat message, boolean prefix, boolean console, UUID sourcePlayer) {
-		broadcast(message, prefix, console, null, sourcePlayer);
-	}
-
-	/**
-	 * Broadcast a message to all players, and eventually to the console.
-	 * <p>
-	 * This method does not restrict the reception of the message to a specific permission. If you
-	 * want to specify a permission, use {@link #broadcast(BaseComponent, boolean, boolean, String)}.
-	 * <p>
-	 * This method assumes this message is not caused by a specific player. To specify the source player, use
-	 * {@link #broadcast(BaseComponent, boolean, boolean, UUID)}.
-	 *
-	 * @param message the message to send.
-	 * @param prefix if the server prefix will be prepended to the message.
-	 * @param console if the message must be displayed in the console.
-	 * @throws IllegalArgumentException if message is null.
-	 */
-	public static void broadcast(Chat message, boolean prefix, boolean console) {
-		broadcast(message, prefix, console, null, null);
-	}
-
-	/**
-	 * Broadcast a message to some or all players, and eventually to the console.
-	 * <p>
-	 * This method assumes this message is not caused by a specific player. To specify the source player, use
-	 * {@link #broadcast(BaseComponent, boolean, String, UUID)}.
-	 * <p>
-	 * This method decides to send the message to the console depending on whether {@code permission}
-	 * is null (will send to console) or not (will not send to console). To specify this behaviour, use
-	 * {@link #broadcast(BaseComponent, boolean, boolean, String)}.
 	 *
 	 * @param message the message to send.
 	 * @param prefix if the server prefix will be prepended to the message.
 	 * @param permission if not null, the message is only sent to player with this permission (but not to console).
 	 * 			If null, the message will be sent to all players and to console.
-	 * @throws IllegalArgumentException if message is null.
-	 */
-	public static void broadcast(Chat message, boolean prefix, String permission) {
-		broadcast(message, prefix, (permission == null), permission, null);
-	}
-
-	/**
-	 * Broadcast a message to all players, and to the console.
-	 * <p>
-	 * This method does not restrict the reception of the message to a specific permission. If you
-	 * want to specify a permission, use {@link #broadcast(BaseComponent, boolean, String, UUID)}.
-	 * <p>
-	 * This method sends the message to the console. To change this behaviour, use
-	 * {@link #broadcast(BaseComponent, boolean, boolean, UUID)}.
-	 *
-	 * @param message the message to send.
-	 * @param prefix if the server prefix will be prepended to the message.
 	 * @param sourcePlayer specifiy the eventual player that is the source of the message.
 	 * 			If null, the message will be sent as a SYSTEM chat message.
 	 * 			If not null, the message will be sent as a CHAT message, and will not be sent
 	 * 			to players ignoring the provided player.
 	 * @throws IllegalArgumentException if message is null.
 	 */
-	public static void broadcast(Chat message, boolean prefix, UUID sourcePlayer) {
+	public static void broadcast(ComponentLike message, boolean prefix, String permission, UUID sourcePlayer) {
-		broadcast(message, prefix, true, null, sourcePlayer);
+		broadcast(message, prefix, true, permission, sourcePlayer);
 	}
 
 	/**
 	 * Broadcast a message to all players, and to the console.
 	 * <p>
 	 * This method assumes this message is not caused by a specific player. To specify the source player, use
-	 * {@link #broadcast(BaseComponent, boolean, UUID)}.
+	 * {@link #broadcast(ComponentLike, boolean, UUID)}.
 	 * <p>
 	 * This method does not restrict the reception of the message to a specific permission. If you
-	 * want to specify a permission, use {@link #broadcast(BaseComponent, boolean, String)}.
+	 * want to specify a permission, use {@link #broadcast(ComponentLike, boolean, String)}.
 	 * <p>
 	 * This method sends the message to the console. To change this behaviour, use
-	 * {@link #broadcast(BaseComponent, boolean, boolean)}.
+	 * {@link #broadcast(ComponentLike, boolean, boolean)}.
 	 *
 	 * @param message the message to send.
 	 * @param prefix if the server prefix will be prepended to the message.
 	 * @throws IllegalArgumentException if message is null.
 	 */
-	public static void broadcast(Chat message, boolean prefix) {
+	public static void broadcast(ComponentLike message, boolean prefix) {
 		broadcast(message, prefix, true, null, null);
 	}
 	

Core/src/main/java/fr/pandacube/lib/core/players/PlayerFinder.java

@@ -32,13 +32,13 @@ import fr.pandacube.lib.core.util.Log;
  */
 public class PlayerFinder {
 	
-	private static Cache<UUID, String> playerLastKnownName = CacheBuilder.newBuilder()
+	private static final Cache<UUID, String> playerLastKnownName = CacheBuilder.newBuilder()
 			.expireAfterWrite(10, TimeUnit.MINUTES)
 			.maximumSize(1000)
 			.build();
 	
 	record PlayerIdCacheKey(String pName, boolean old) { }
-	private static Cache<PlayerIdCacheKey, UUID> playerId = CacheBuilder.newBuilder()
+	private static final Cache<PlayerIdCacheKey, UUID> playerId = CacheBuilder.newBuilder()
 			.expireAfterWrite(2, TimeUnit.MINUTES)
 			.maximumSize(1000)
 			.build();
@@ -142,7 +142,7 @@ public class PlayerFinder {
 
 	public static boolean isValidPlayerName(String name) {
 		if (name == null) return false;
-		return name.matches("[0-9a-zA-Z_.]{2,20}");
+		return name.matches("[\\da-zA-Z_.]{2,20}");
 	}
 
 	public static SQLPlayer getDBPlayer(UUID id) throws DBException {
@@ -167,7 +167,7 @@ public class PlayerFinder {
 	};
 	
 	@SuppressWarnings("unchecked")
-	public static final <S> SuggestionsSupplier<S> TAB_PLAYER_OFFLINE() {
+	public static <S> SuggestionsSupplier<S> TAB_PLAYER_OFFLINE() {
 		return (SuggestionsSupplier<S>) TAB_PLAYER_OFFLINE;
 	}
 	
@@ -188,12 +188,12 @@ public class PlayerFinder {
 	public static int OLD_NICK_MULTIPLIER = 2;
 	
 	
-	private static List<List<Character>> CONFUSABLE_CHARACTERS = ImmutableList.of(
+	private static final List<List<Character>> CONFUSABLE_CHARACTERS = ImmutableList.of(
 			ImmutableList.of('o', '0'),
 			ImmutableList.of('i', '1', 'l'),
 			ImmutableList.of('b', '8')
 	);
-	private static ToIntBiFunction<Character, Character> CHAR_DISTANCE = (c1, c2) -> {
+	private static final ToIntBiFunction<Character, Character> CHAR_DISTANCE = (c1, c2) -> {
 		if (c1.equals(c2))
 			return 0;
 		for (List<Character> charTab : CONFUSABLE_CHARACTERS) {
@@ -205,7 +205,7 @@ public class PlayerFinder {
 	
 	record NamesCacheResult(String name, String lowercaseName, UUID id) { } // Java 16
 	
-	private static LoadingCache<String, List<NamesCacheResult>> namesCache = CacheBuilder.newBuilder()
+	private static final LoadingCache<String, List<NamesCacheResult>> namesCache = CacheBuilder.newBuilder()
 			.expireAfterWrite(2, TimeUnit.MINUTES)
 			.maximumSize(1)
 			.build(CacheLoader.from((String k) -> {
@@ -221,7 +221,7 @@ public class PlayerFinder {
 				return cached;
 			}));
 	
-	private static LoadingCache<String, SearchResponse> searchCache = CacheBuilder.newBuilder()
+	private static final LoadingCache<String, SearchResponse> searchCache = CacheBuilder.newBuilder()
 			.expireAfterWrite(2, TimeUnit.MINUTES)
 			.maximumSize(100)
 			.build(CacheLoader.from((String query) -> {

Core/src/main/java/fr/pandacube/lib/core/players/SQLPlayerIgnore.java

@@ -46,7 +46,6 @@ public class SQLPlayerIgnore extends SQLElement<SQLPlayerIgnore> {
 		}
 		if (el != null && !newIgnoreState) {
 			el.delete();
-			return;
 		}
 
 	}

Core/src/main/java/fr/pandacube/lib/core/search/SearchEngine.java

@@ -1,5 +1,9 @@
 package fr.pandacube.lib.core.search;
 
+import com.google.common.cache.Cache;
+import com.google.common.cache.CacheBuilder;
+import fr.pandacube.lib.core.util.Log;
+
 import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.HashSet;
@@ -7,15 +11,9 @@ import java.util.List;
 import java.util.Map;
 import java.util.Objects;
 import java.util.Set;
-import java.util.concurrent.Callable;
 import java.util.concurrent.ExecutionException;
 import java.util.stream.Collectors;
 
-import com.google.common.cache.Cache;
-import com.google.common.cache.CacheBuilder;
-
-import fr.pandacube.lib.core.util.Log;
-
 /**
  * Utility class to manage searching among a set of
  * SearchResult instances, using case insensitive
@@ -23,15 +21,15 @@ import fr.pandacube.lib.core.util.Log;
  */
 public class SearchEngine<R extends SearchResult> {
 
-	Map<String, Set<R>> searchKeywordsResultMap = new HashMap<>();
+	private final Map<String, Set<R>> searchKeywordsResultMap = new HashMap<>();
-	Map<R, Set<String>> resultsSearchKeywordsMap = new HashMap<>();
+	private final Map<R, Set<String>> resultsSearchKeywordsMap = new HashMap<>();
 
-	Map<String, Set<R>> suggestionsKeywordsResultMap = new HashMap<>();
+	private final Map<String, Set<R>> suggestionsKeywordsResultMap = new HashMap<>();
-	Map<R, Set<String>> resultsSuggestionsKeywordsMap = new HashMap<>();
+	private final Map<R, Set<String>> resultsSuggestionsKeywordsMap = new HashMap<>();
+
+	private final Set<R> resultSet = new HashSet<>();
 	
-	Set<R> resultSet = new HashSet<>();
+	private final Cache<Set<String>, List<String>> suggestionsCache;
-	
-	private Cache<Set<String>, List<String>> suggestionsCache;
 	
 	public SearchEngine(int suggestionsCacheSize) {
 		suggestionsCache = CacheBuilder.newBuilder()
@@ -50,7 +48,7 @@ public class SearchEngine<R extends SearchResult> {
 			searchKw = result.getSearchKeywords();
 			Objects.requireNonNull(searchKw, "SearchResult instance must provide a non null set of search keywords");
 			searchKw = searchKw.stream()
-					.filter(e -> e != null)
+					.filter(Objects::nonNull)
 					.map(String::toLowerCase)
 					.collect(Collectors.toSet());
 		} catch (Exception e) {
@@ -63,7 +61,7 @@ public class SearchEngine<R extends SearchResult> {
 			suggestsKw = result.getSuggestionKeywords();
 			Objects.requireNonNull(suggestsKw, "SearchResult instance must provide a non null set of suggestions keywords");
 			suggestsKw = new HashSet<>(suggestsKw);
-			suggestsKw.removeIf(e -> e == null);
+			suggestsKw.removeIf(Objects::isNull);
 		} catch (Exception e) {
 			Log.severe(e);
 			return;
@@ -123,7 +121,7 @@ public class SearchEngine<R extends SearchResult> {
 	
 	public synchronized Set<R> search(Set<String> searchTerms) {
 		if (searchTerms == null)
-			searchTerms = new HashSet<String>();
+			searchTerms = new HashSet<>();
 		
 		Set<R> retainedResults = new HashSet<>(resultSet);
 		for (String term : searchTerms) {
@@ -157,7 +155,7 @@ public class SearchEngine<R extends SearchResult> {
 				.collect(Collectors.toSet());
 		
 		try {
-			return suggestionsCache.get(lowerCaseSearchTerm, (Callable<List<String>>) () -> {
+			return suggestionsCache.get(lowerCaseSearchTerm, () -> {
 				Set<R> prevResults = search(lowerCaseSearchTerm);
 				
 				Set<String> suggestions = new HashSet<>();

Core/src/main/java/fr/pandacube/lib/core/search/SearchResult.java

@@ -4,8 +4,8 @@ import java.util.Set;
 
 public interface SearchResult {
 	
-	public Set<String> getSearchKeywords();
+	Set<String> getSearchKeywords();
 	
-	public Set<String> getSuggestionKeywords();
+	Set<String> getSuggestionKeywords();
 
 }

Core/src/main/java/fr/pandacube/lib/core/util/AmountPerTimeLimiter.java

@@ -19,7 +19,7 @@ public class AmountPerTimeLimiter {
 	
 	
 	
-	private class Entry {
+	private static class Entry {
 		private final long time;
 		private double amount;
 		public Entry(long t, double a) {

Core/src/main/java/fr/pandacube/lib/core/util/BiMap.java

@@ -11,8 +11,8 @@ import java.util.function.Supplier;
 
 public class BiMap<K, V> implements Iterable<Entry<K, V>> {
 
-    protected Map<K, V> map;
+    protected final Map<K, V> map;
-    protected Map<V, K> inversedMap;
+    protected final Map<V, K> inversedMap;
     
     private BiMap<V, K> reversedView = null;
     

Core/src/main/java/fr/pandacube/lib/core/util/CronExpression.java

@@ -299,7 +299,7 @@ public class CronExpression {
         this.hourField = new SimpleField(CronFieldType.HOUR, parts[ix++]);
         this.dayOfMonthField = new DayOfMonthField(parts[ix++]);
         this.monthField = new SimpleField(CronFieldType.MONTH, parts[ix++]);
-        this.dayOfWeekField = new DayOfWeekField(parts[ix++]);
+        this.dayOfWeekField = new DayOfWeekField(parts[ix]);
     }
 
     public static CronExpression create(final String expr) {
@@ -336,7 +336,7 @@ public class CronExpression {
             if (!monthField.nextMatch(nextDateTime)) {
                 continue;
             }
-            if (!findDay(nextDateTime, dateTimeBarrier)) {
+            if (!findDay(nextDateTime)) {
                 continue;
             }
             if (!hourField.nextMatch(nextDateTime)) {
@@ -361,11 +361,10 @@ public class CronExpression {
      * to handle them together in the same method.
      *
      * @param dateTime        Initial {@link ZonedDateTime} instance to start from
-     * @param dateTimeBarrier At which point stop searching for next execution time
      * @return {@code true} if a match was found for this field or {@code false} if the field overflowed
-     * @see {@link SimpleField#nextMatch(ZonedDateTime[])}
+     * @see SimpleField#nextMatch(ZonedDateTime[])
      */
-    private boolean findDay(ZonedDateTime[] dateTime, ZonedDateTime dateTimeBarrier) {
+    private boolean findDay(ZonedDateTime[] dateTime) {
         int month = dateTime[0].getMonthValue();
 
             while (!(dayOfMonthField.matches(dateTime[0].toLocalDate())
@@ -400,16 +399,19 @@ public class CronExpression {
     }
 
     abstract static class BasicField {
+        @SuppressWarnings({"RegExpRepeatedSpace", "RegExpSimplifiable", "RegExpSingleCharAlternation", "RegExpRedundantEscape"})
         private static final Pattern CRON_FIELD_REGEXP = Pattern
-                .compile("(?:                                             # start of group 1\n"
+                .compile("""
-                        + "   (?:(?<all>\\*)|(?<ignore>\\?)|(?<last>L))  # global flag (L, ?, *)\n"
+                                (?:                                             # start of group 1
-                        + " | (?<start>[0-9]{1,2}|[a-z]{3,3})              # or start number or symbol\n"
+                                   (?:(?<all>\\*)|(?<ignore>\\?)|(?<last>L))  # global flag (L, ?, *)
-                        + "      (?:                                        # start of group 2\n"
+                                 | (?<start>[0-9]{1,2}|[a-z]{3,3})              # or start number or symbol
-                        + "         (?<mod>L|W)                             # modifier (L,W)\n"
+                                      (?:                                        # start of group 2
-                        + "       | -(?<end>[0-9]{1,2}|[a-z]{3,3})        # or end nummer or symbol (in range)\n"
+                                         (?<mod>L|W)                             # modifier (L,W)
-                        + "      )?                                         # end of group 2\n"
+                                       | -(?<end>[0-9]{1,2}|[a-z]{3,3})        # or end nummer or symbol (in range)
-                        + ")                                              # end of group 1\n"
+                                      )?                                         # end of group 2
-                        + "(?:(?<incmod>/|\\#)(?<inc>[0-9]{1,7}))?        # increment and increment modifier (/ or \\#)\n",
+                                )                                              # end of group 1
+                                (?:(?<incmod>/|\\#)(?<inc>[0-9]{1,7}))?        # increment and increment modifier (/ or \\#)
+                                """,
                         Pattern.CASE_INSENSITIVE | Pattern.COMMENTS);
 
         final CronFieldType fieldType;
@@ -500,10 +502,7 @@ public class CronExpression {
         }
 
         protected boolean matches(int val, FieldPart part) {
-            if (val >= part.from && val <= part.to && (val - part.from) % part.increment == 0) {
+            return val >= part.from && val <= part.to && (val - part.from) % part.increment == 0;
-                return true;
-            }
-            return false;
         }
 
         protected int nextMatch(int val, FieldPart part) {
@@ -529,17 +528,6 @@ public class CronExpression {
             super(fieldType, fieldExpr);
         }
 
-        public boolean matches(int val) {
-            if (val >= fieldType.from && val <= fieldType.to) {
-                for (FieldPart part : parts) {
-                    if (matches(val, part)) {
-                        return true;
-                    }
-                }
-            }
-            return false;
-        }
-
         /**
          * Find the next match for this field. If a match cannot be found force an overflow and increase the next
          * greatest field.
@@ -602,9 +590,9 @@ public class CronExpression {
 
         @Override
         protected void validatePart(FieldPart part) {
-            if (part.modifier != null && Arrays.asList("L", "?").indexOf(part.modifier) == -1) {
+            if (part.modifier != null && !Arrays.asList("L", "?").contains(part.modifier)) {
                 throw new IllegalArgumentException(String.format("Invalid modifier [%s]", part.modifier));
-            } else if (part.incrementModifier != null && Arrays.asList("/", "#").indexOf(part.incrementModifier) == -1) {
+            } else if (part.incrementModifier != null && !Arrays.asList("/", "#").contains(part.incrementModifier)) {
                 throw new IllegalArgumentException(String.format("Invalid increment modifier [%s]", part.incrementModifier));
             }
         }
@@ -639,7 +627,7 @@ public class CronExpression {
 
         @Override
         protected void validatePart(FieldPart part) {
-            if (part.modifier != null && Arrays.asList("L", "W", "?").indexOf(part.modifier) == -1) {
+            if (part.modifier != null && !Arrays.asList("L", "W", "?").contains(part.modifier)) {
                 throw new IllegalArgumentException(String.format("Invalid modifier [%s]", part.modifier));
             } else if (part.incrementModifier != null && !"/".equals(part.incrementModifier)) {
                 throw new IllegalArgumentException(String.format("Invalid increment modifier [%s]", part.incrementModifier));

Core/src/main/java/fr/pandacube/lib/core/util/DistanceUtil.java

@@ -19,8 +19,8 @@ public class DistanceUtil {
 
 		String precisionFormat = "##0";
 		if (precision > 0) precisionFormat += ".";
-		for (int i = 0; i < precision; i++)
+		precisionFormat += "0".repeat(precision);
-			precisionFormat += "0";
+
 		DecimalFormat df = new DecimalFormat(precisionFormat);
 
 		double dist = meterDist / choosenUnit.multiplicator;
@@ -33,12 +33,17 @@ public class DistanceUtil {
 	}
 
 	public enum DistanceUnit {
-		NM(0.000000001, "nm"), µM(0.000001, "µm"), MM(0.001, "mm"), CM(0.01, "cm"), M(1, "m"), KM(1000, "km");
+		NM(0.000000001, "nm"),
+		UM(0.000001, "µm"),
+		MM(0.001, "mm"),
+		CM(0.01, "cm"),
+		M(1, "m"),
+		KM(1000, "km");
 
 		private final double multiplicator;
 		private final String unitStr;
 
-		private DistanceUnit(double mult, String s) {
+		DistanceUnit(double mult, String s) {
 			multiplicator = mult;
 			unitStr = s;
 		}

Core/src/main/java/fr/pandacube/lib/core/util/EnumUtil.java

@@ -1,5 +1,8 @@
 package fr.pandacube.lib.core.util;
 
+import java.util.Arrays;
+import java.util.stream.Collectors;
+
 public class EnumUtil {
 
 	/**
@@ -10,17 +13,9 @@ public class EnumUtil {
 	 * @return a string representation of the enum class.
 	 */
 	public static <T extends Enum<T>> String enumList(Class<T> enumType, String separator) {
-		T[] elements = enumType.getEnumConstants();
+		return Arrays.stream(enumType.getEnumConstants())
-
+				.map(Enum::name)
-		String out = "";
+				.collect(Collectors.joining(separator));
-		boolean first = true;
-		for (T el : elements) {
-			if (!first) out += separator;
-			first = false;
-			out += el.name();
-
-		}
-		return out;
 	}
 
 	/**

Core/src/main/java/fr/pandacube/lib/core/util/FileUtils.java

@@ -3,6 +3,7 @@ package fr.pandacube.lib.core.util;
 import java.io.File;
 import java.io.IOException;
 import java.nio.file.Files;
+import java.nio.file.attribute.BasicFileAttributes;
 
 public class FileUtils {
 	
@@ -20,12 +21,17 @@ public class FileUtils {
 		if (target.exists() && !target.isDirectory()) {
 			throw new IllegalStateException("target file already exists: " + target);
 		}
-		if (source.isDirectory()) {
+		BasicFileAttributes sourceAttr = Files.readAttributes(source.toPath(), BasicFileAttributes.class);
-			target.mkdir();
+		if (sourceAttr.isDirectory()) {
-			for (String child : source.list())
+			if (target.mkdir()) {
-				copy(new File(source, child), new File(target, child));
+				for (String child : source.list())
+					copy(new File(source, child), new File(target, child));
+			}
+			else {
+				throw new IOException("Cannot create directory " + target);
+			}
 		}
-		else if (source.isFile()) {
+		else if (sourceAttr.isRegularFile()) {
 			Files.copy(source.toPath(), target.toPath());
 		}
 	}

Core/src/main/java/fr/pandacube/lib/core/util/GifDecoder.java

@@ -103,13 +103,7 @@ public class GifDecoder {
 	protected ArrayList<GifFrame> frames; // frames read from current file
 	protected int frameCount;
 
-	static class GifFrame {
+	record GifFrame(BufferedImage image, int delay) {
-		public GifFrame(BufferedImage im, int del) {
-			image = im;
-			delay = del;
-		}
-		public BufferedImage image;
-		public int delay;
 	}
 
 	/**
@@ -184,12 +178,7 @@ public class GifDecoder {
 				if (lastDispose == 2) {
 					// fill last image rect area with background color
 					Graphics2D g = image.createGraphics();
-					Color c = null;
+					Color c = transparency ? new Color(0, 0, 0, 0) : new Color(lastBgColor);
-					if (transparency) {
-						c = new Color(0, 0, 0, 0); 	// assume background is transparent
-					} else {
-						c = new Color(lastBgColor); // use given background color
-					}
 					g.setColor(c);
 					g.setComposite(AlphaComposite.Src); // replace area
 					g.fill(lastRect);
@@ -270,7 +259,7 @@ public class GifDecoder {
 	/**
 	 * Reads GIF image from stream
 	 *
-	 * @param BufferedInputStream containing GIF file.
+	 * @param is containing GIF file.
 	 * @return read status code (0 = no errors)
 	 */
 	public int read(BufferedInputStream is) {
@@ -286,7 +275,7 @@ public class GifDecoder {
 			}
 			try {
 				is.close();
-			} catch (IOException e) {
+			} catch (IOException ignored) {
 			}
 		} else {
 			status = STATUS_OPEN_ERROR;
@@ -297,7 +286,7 @@ public class GifDecoder {
 	/**
 	 * Reads GIF image from stream
 	 *
-	 * @param InputStream containing GIF file.
+	 * @param is containing GIF file.
 	 * @return read status code (0 = no errors)
 	 */
 	public int read(InputStream is) {
@@ -315,7 +304,7 @@ public class GifDecoder {
 			}
 			try {
 				is.close();
-			} catch (IOException e) {
+			} catch (IOException ignored) {
 			}
 		} else {
 			status = STATUS_OPEN_ERROR;
@@ -334,7 +323,7 @@ public class GifDecoder {
 		status = STATUS_OK;
 		try {
 			name = name.trim().toLowerCase();
-			if ((name.indexOf("file:") >= 0) ||
+			if ((name.contains("file:")) ||
 				(name.indexOf(":/") > 0)) {
 				URL url = new URL(name);
 				in = new BufferedInputStream(url.openStream());
@@ -524,14 +513,14 @@ public class GifDecoder {
 		int n = 0;
 		if (blockSize > 0) {
 			try {
-				int count = 0;
+				int count;
 				while (n < blockSize) {
 					count = in.read(block, n, blockSize - n);
 					if (count == -1) 
 						break;
 					n += count;
 				}
-			} catch (IOException e) {
+			} catch (IOException ignored) {
 			}
 
 			if (n < blockSize) {
@@ -554,7 +543,7 @@ public class GifDecoder {
 		int n = 0;
 		try {
 			n = in.read(c);
-		} catch (IOException e) {
+		} catch (IOException ignored) {
 		}
 		if (n < nbytes) {
 			status = STATUS_FORMAT_ERROR;
@@ -595,11 +584,11 @@ public class GifDecoder {
 
 						case 0xff : // application extension
 							readBlock();
-							String app = "";
+							StringBuilder app = new StringBuilder();
 							for (int i = 0; i < 11; i++) {
-								app += (char) block[i];
+								app.append((char) block[i]);
 							}
-							if (app.equals("NETSCAPE2.0")) {
+							if (app.toString().equals("NETSCAPE2.0")) {
 								readNetscapeExt();
 							}
 							else
@@ -644,11 +633,11 @@ public class GifDecoder {
 	 * Reads GIF file header information.
 	 */
 	protected void readHeader() {
-		String id = "";
+		StringBuilder id = new StringBuilder();
 		for (int i = 0; i < 6; i++) {
-			id += (char) read();
+			id.append((char) read());
 		}
-		if (!id.startsWith("GIF")) {
+		if (!id.toString().startsWith("GIF")) {
 			status = STATUS_FORMAT_ERROR;
 			return;
 		}
@@ -769,9 +758,6 @@ public class GifDecoder {
 		lastRect = new Rectangle(ix, iy, iw, ih);
 		lastImage = image;
 		lastBgColor = bgColor;
-		/*int dispose = 0;
-		boolean transparency = false;
-		int delay = 0;*/
 		lct = null;
 	}
 

Core/src/main/java/fr/pandacube/lib/core/util/IteratorIterator.java

@@ -9,7 +9,7 @@ import java.util.NoSuchElementException;
 public class IteratorIterator<T> implements Iterator<T> {
 
 	public static <T> IteratorIterator<T> ofCollectionOfIterable(Collection<Iterable<T>> coll) {
-		return new IteratorIterator<>(coll.stream().map(i -> i.iterator()).iterator());
+		return new IteratorIterator<>(coll.stream().map(Iterable::iterator).iterator());
 	}
 	
 	public static <T> IteratorIterator<T> ofCollectionOfIterator(Collection<Iterator<T>> coll) {
@@ -18,7 +18,7 @@ public class IteratorIterator<T> implements Iterator<T> {
 
 	@SafeVarargs
 	public static <T> IteratorIterator<T> ofArrayOfIterable(Iterable<T>... arr) {
-		return new IteratorIterator<>(Arrays.stream(arr).map(i -> i.iterator()).iterator());
+		return new IteratorIterator<>(Arrays.stream(arr).map(Iterable::iterator).iterator());
 	}
 	
 	@SafeVarargs
@@ -26,7 +26,7 @@ public class IteratorIterator<T> implements Iterator<T> {
 		return new IteratorIterator<>(Arrays.asList(arr).iterator());
 	}
 	
-	private Iterator<Iterator<T>> iterators;
+	private final Iterator<Iterator<T>> iterators;
 	
 	private Iterator<T> currentIterator = null;
 	
@@ -59,5 +59,16 @@ public class IteratorIterator<T> implements Iterator<T> {
 			throw new NoSuchElementException("No next value found in iterator.");
 		return currentIterator.next();
 	}
-	
+
+	/**
+	 * @implNote The current implementation of {@link IteratorIterator} may not support
+	 * running this method if the current position is the last value of one of
+	 * the underlying iterable, and if the {@link #hasNext()} method has been called before this one.
+	 */
+	@Override
+	public void remove() {
+		// TODO change code to avoid currentIterator being null because we are about to change currentIterator
+		if (currentIterator != null)
+			currentIterator.remove();
+	}
 }

Core/src/main/java/fr/pandacube/lib/core/util/JArithmeticInterpreter.java

@@ -53,7 +53,7 @@ pour les calculs (division par zero, etc...).
 
 */
 
-// Classe servant <EFBFBD> palier l'absence de passage par variables ou reference
+// Classe servant à palier l'absence de passage par variables ou reference
 
 class VariableInt {
 	public int mValue;
@@ -65,8 +65,8 @@ public class JArithmeticInterpreter {
 
 	// Variables
 
-	int mOperator;
+	final int mOperator;
-	double mValue;
+	final double mValue;
 	JArithmeticInterpreter fg, fd;
 
 	// Methods
@@ -75,27 +75,21 @@ public class JArithmeticInterpreter {
 	// Node
 
 	private JArithmeticInterpreter() {
-		this(0, 0, null, null);
+		this(0, 0);
 	}
 
 	// ....................................................................................
 	// Node
 
-	private JArithmeticInterpreter(int Operator, double Value, JArithmeticInterpreter Fg, JArithmeticInterpreter Fd) {
+	private JArithmeticInterpreter(int Operator, double Value) {
 		mOperator = Operator;
 		mValue = Value;
-		fg = Fg;
-		fd = Fd;
-	}
-
-	private JArithmeticInterpreter(int Operator, double Value) {
-		this(Operator, Value, null, null);
 	}
 
 	// ....................................................................................
 	// Construct_Tree
 
-	private static JArithmeticInterpreter constructTree(StringBuffer string, int length, int error) {
+	private static JArithmeticInterpreter constructTree(StringBuffer string, int length) {
 		int imbric, Bimbric;
 		int priorite, ope;
 		int position, positionv, i, j;
@@ -108,7 +102,6 @@ public class JArithmeticInterpreter {
 		// Initialisation des variables
 
 		if (length <= 0) {
-			error = 3;
 			return null;
 		}
 
@@ -180,7 +173,6 @@ public class JArithmeticInterpreter {
 					i++;
 				}
 				else {
-					error = 2; // symbole non reconnu
 					return null;
 				}
 			}
@@ -202,7 +194,7 @@ public class JArithmeticInterpreter {
 						position = i;
 						caspp = 0;
 					}
-					else if ((imbric == Bimbric) && (priorite >= 1)) {
+					else if (imbric == Bimbric) {
 						priorite = 1;
 						ope = 1;
 						position = i;
@@ -238,7 +230,7 @@ public class JArithmeticInterpreter {
 							caspp = 0;
 						}
 					}
-					else if ((imbric == Bimbric) && (priorite >= 1)) if ((i - 1) < 0) {
+					else if (imbric == Bimbric) if ((i - 1) < 0) {
 						if (priorite > 5) {
 							priorite = 1;
 							position = i;
@@ -308,12 +300,10 @@ public class JArithmeticInterpreter {
 					i++;
 					break;
 				default:
-					error = 2; // symbole non reconnu
 					return null;
 				}
 
 		if (imbric != 0) {
-			error = 1; // erreur de "parenthesage"
 			return null;
 		}
 
@@ -330,46 +320,42 @@ public class JArithmeticInterpreter {
 			node.fd = new JArithmeticInterpreter();
 
 			if ((length - position - 1 - Bimbric) == 0) { // argument absent
-				error = 3;
 				return null;
 			}
 			StringBuffer temp = CopyPartialString(string, (position + 1), (length - 1 - Bimbric));
-			node.fd = constructTree(temp, (length - position - 1 - Bimbric), error);
+			node.fd = constructTree(temp, (length - position - 1 - Bimbric));
 
 			return node;
 		}
 
 		else if (priorite == 5) {
-			node = new JArithmeticInterpreter(0, calc_const(string, positionv), null, null);
+			node = new JArithmeticInterpreter(0, calc_const(string, positionv));
 
 			return node;
 		}
 		else if (ope > 5) {
-			node = new JArithmeticInterpreter(ope, 0, null, null);
+			node = new JArithmeticInterpreter(ope, 0);
 
 			if ((length - position - espa - Bimbric) == 0) { // argument absent
-				error = 3;
 				return null;
 			}
 			StringBuffer temp = CopyPartialString(string, (position + espa), (length - 1));
-			node.fg = constructTree(temp, (length - position - espa - Bimbric), error);
+			node.fg = constructTree(temp, (length - position - espa - Bimbric));
 			return node;
 		}
 		else {
-			node = new JArithmeticInterpreter(ope, 0, null, null);
+			node = new JArithmeticInterpreter(ope, 0);
 
 			if ((position - Bimbric) == 0) { // argument absent
-				error = 3;
 				return null;
 			}
 			StringBuffer temp = CopyPartialString(string, Bimbric, (position - 1));
-			node.fg = constructTree(temp, (position - Bimbric), error);
+			node.fg = constructTree(temp, (position - Bimbric));
 			if ((length - position - 1 - Bimbric) == 0) { // argument absent
-				error = 3;
 				return null;
 			}
 			temp = CopyPartialString(string, (position + 1), (length - 1 - Bimbric));
-			node.fd = constructTree(temp, (length - position - 1 - Bimbric), error);
+			node.fd = constructTree(temp, (length - position - 1 - Bimbric));
 			return node;
 		}
 	}
@@ -378,15 +364,12 @@ public class JArithmeticInterpreter {
 
 	private double computeTree() {
 		if (mOperator == 0) return mValue;
-		int error = 0;
 
 		double valueL = fg.computeTree();
 
-		if (error != 0) return 0;
 		double valueR = 0;
 
 		if (fd != null) valueR = fd.computeTree();
-		if (error != 0) return 0;
 
 		switch (mOperator) {
 		case 1: // +
@@ -397,7 +380,6 @@ public class JArithmeticInterpreter {
 			return (valueL * valueR);
 		case 4: // -
 			if (valueR == 0) {
-				error = 1;
 				return 0;
 			}
 			return (valueL / valueR);
@@ -407,23 +389,16 @@ public class JArithmeticInterpreter {
 			return Math.exp(valueL);
 		case 7: // ln
 			if (valueL <= 0) {
-				if (valueL < 0) error = 2;
-				else
-					error = 1;
 				return 0;
 			}
 			return (Math.log(valueL) / Math.log(2));
 		case 8: // log
 			if (valueL <= 0) {
-				if (valueL < 0) error = 2;
-				else
-					error = 1;
 				return 0;
 			}
 			return Math.log(valueL);
 		case 9: // sqrt
 			if (valueL < 0) {
-				error = 2;
 				return 0;
 			}
 			return Math.sqrt(valueL);
@@ -462,8 +437,7 @@ public class JArithmeticInterpreter {
 			fd.writeTree(string);
 			break;
 		case 2:
-			if ((fg.mOperator == 0) && (fg.mValue == 0)) ;
+			if (fg.mOperator != 0 || fg.mValue != 0)
-			else
 				fg.writeTree(string);
 			string.append('-');
 			if ((fd.mOperator == 1) || (fd.mOperator == 2)) {
@@ -471,7 +445,7 @@ public class JArithmeticInterpreter {
 				string.append('(');
 			}
 			fd.writeTree(string);
-			if (parenthese == true) string.append(')');
+			if (parenthese) string.append(')');
 			break;
 		case 3:
 			if ((fg.mOperator == 1) || (fg.mOperator == 2)) {
@@ -479,7 +453,7 @@ public class JArithmeticInterpreter {
 				string.append('(');
 			}
 			fg.writeTree(string);
-			if (parenthese == true) string.append(')');
+			if (parenthese) string.append(')');
 			parenthese = false;
 			string.append('*');
 			if ((fd.mOperator == 1) || (fd.mOperator == 2)) {
@@ -487,7 +461,7 @@ public class JArithmeticInterpreter {
 				string.append('(');
 			}
 			fd.writeTree(string);
-			if (parenthese == true) string.append(')');
+			if (parenthese) string.append(')');
 			break;
 		case 4:
 			if ((fg.mOperator == 1) || (fg.mOperator == 2)) {
@@ -495,7 +469,7 @@ public class JArithmeticInterpreter {
 				string.append('(');
 			}
 			fg.writeTree(string);
-			if (parenthese == true) string.append(')');
+			if (parenthese) string.append(')');
 			parenthese = false;
 			string.append('/');
 			if ((fd.mOperator > 0) && (fd.mOperator < 5)) {
@@ -503,7 +477,7 @@ public class JArithmeticInterpreter {
 				string.append('(');
 			}
 			fd.writeTree(string);
-			if (parenthese == true) string.append(')');
+			if (parenthese) string.append(')');
 			break;
 		case 5:
 			if ((fg.mOperator > 0) && (fg.mOperator < 5)) {
@@ -511,7 +485,7 @@ public class JArithmeticInterpreter {
 				string.append('(');
 			}
 			fg.writeTree(string);
-			if (parenthese == true) string.append(')');
+			if (parenthese) string.append(')');
 			parenthese = false;
 			string.append('^');
 			if ((fd.mOperator > 0) && (fd.mOperator < 5)) {
@@ -519,7 +493,7 @@ public class JArithmeticInterpreter {
 				string.append('(');
 			}
 			fd.writeTree(string);
-			if (parenthese == true) string.append(')');
+			if (parenthese) string.append(')');
 			break;
 		case 6:
 			string.append("exp(");
@@ -732,8 +706,8 @@ public class JArithmeticInterpreter {
 		JArithmeticInterpreter jai = null;
 
 		try {
-			jai = JArithmeticInterpreter.constructTree(input, input.length(), 0);
+			jai = JArithmeticInterpreter.constructTree(input, input.length());
-		} catch (Exception e) {}
+		} catch (Exception ignored) {}
 
 		if (jai == null) throw new IllegalArgumentException("Le calcul passé en paramètre est invalide");
 
@@ -749,7 +723,7 @@ public class JArithmeticInterpreter {
 		return getResultFromExpression(expr, null);
 	}
 
-	public static void main(String args[]) {
+	public static void main(String[] args) {
 
 		StringBuffer b = new StringBuffer(0);
 

Core/src/main/java/fr/pandacube/lib/core/util/Json.java

@@ -18,9 +18,9 @@ import com.google.gson.stream.JsonToken;
 import com.google.gson.stream.JsonWriter;
 
 public class Json {
-	public static final Gson gson = build(b -> b);
+	public static final Gson gson = build(Function.identity());
-	public static final Gson gsonPrettyPrinting = build(b -> b.setPrettyPrinting());
+	public static final Gson gsonPrettyPrinting = build(GsonBuilder::setPrettyPrinting);
-	public static final Gson gsonSerializeNulls = build(b -> b.serializeNulls());
+	public static final Gson gsonSerializeNulls = build(GsonBuilder::serializeNulls);
 	public static final Gson gsonSerializeNullsPrettyPrinting = build(b -> b.serializeNulls().setPrettyPrinting());
 
 
@@ -46,9 +46,9 @@ public class Json {
 	}
 
 	private static class RecordTypeAdapter<T> extends TypeAdapter<T> {
-		private Gson gson;
+		private final Gson gson;
-		private TypeAdapterFactory factory;
+		private final TypeAdapterFactory factory;
-		private TypeToken<T> type;
+		private final TypeToken<T> type;
 
 		public RecordTypeAdapter(Gson gson, TypeAdapterFactory factory, TypeToken<T> type) {
 			this.gson = gson;
@@ -72,8 +72,8 @@ public class Json {
 
 				RecordComponent[] recordComponents = clazz.getRecordComponents();
 				Map<String, TypeToken<?>> typeMap = new HashMap<>();
-				for (int i = 0; i < recordComponents.length; i++) {
+				for (RecordComponent recordComponent : recordComponents) {
-					typeMap.put(recordComponents[i].getName(), TypeToken.get(recordComponents[i].getGenericType()));
+					typeMap.put(recordComponent.getName(), TypeToken.get(recordComponent.getGenericType()));
 				}
 				var argsMap = new HashMap<String, Object>();
 				reader.beginObject();

Core/src/main/java/fr/pandacube/lib/core/util/LazyOrException.java

@@ -2,6 +2,8 @@ package fr.pandacube.lib.core.util;
 
 import java.util.Objects;
 
+import fr.pandacube.lib.core.util.ThrowableUtil.SupplierException;
+
 /**
  * Represents a lazy loaded value.
  * 
@@ -42,11 +44,5 @@ public class LazyOrException<T> {
 		cachedValue = value;
 		cached = true;
 	}
-	
-	
-	@FunctionalInterface
-	public interface SupplierException<T> {
-		public T get() throws Exception;
-	}
 
 }

Core/src/main/java/fr/pandacube/lib/core/util/LevenshteinDistance.java

@@ -5,12 +5,12 @@ import java.util.function.ToIntBiFunction;
 
 public class LevenshteinDistance {
 	
-	private String initialList;
+	private final String initialList;
 
-	private int elementAdditionScore;
+	private final int elementAdditionScore;
-	private int elementDeletionScore;
+	private final int elementDeletionScore;
 	
-	private ToIntBiFunction<Character, Character> elementDistanceFunction;
+	private final ToIntBiFunction<Character, Character> elementDistanceFunction;
 	
 	private int[] prev, curr; 
 	

Core/src/main/java/fr/pandacube/lib/core/util/Log.java

@@ -7,7 +7,7 @@ import java.util.logging.Logger;
 public class Log {
 
 	private static Logger logger = Logger.getGlobal();
-	private static AtomicBoolean logDebug = new AtomicBoolean(false);
+	private static final AtomicBoolean logDebug = new AtomicBoolean(false);
 
 	public static void setDebug(boolean newVal) {
 		logDebug.set(newVal);

Core/src/main/java/fr/pandacube/lib/core/util/MappedListView.java

@@ -1,12 +1,23 @@
 package fr.pandacube.lib.core.util;
 
 import java.util.AbstractList;
+import java.util.Iterator;
 import java.util.List;
+import java.util.ListIterator;
 import java.util.function.Function;
 
+/**
+ * A Wrapper list that provides a mapped view of the backend list.
+ * Every modification of this list will modify the bakend list.
+ * For each time a value is accessed or modified, the appropriate
+ * setter or getter is used to convert the value between the source {@code S}
+ * and the visible {@code T} type.
+ * @param <S> the source (backend) type
+ * @param <T> the visible (mapped) type
+ */
 public class MappedListView<S, T> extends AbstractList<T> {
 	
-	private final List<S> backend;
+	protected final List<S> backend;
 	private final Function<S, T> getter;
 	private final Function<T, S> setter;
 	
@@ -28,25 +39,149 @@ public class MappedListView<S, T> extends AbstractList<T> {
 	
 	
 	@Override
-	public int size() { return backend.size(); }
+	public int size() {
+		return backend.size();
+	}
+
 	@Override
-	public T get(int index) { return getter.apply(backend.get(index)); }
+	public T get(int index) {
+		return getter.apply(backend.get(index));
+	}
+
 	@Override
-	public T set(int index, T element) { return getter.apply(backend.set(index, setter.apply(element))); }
+	public T set(int index, T element) {
+		return getter.apply(backend.set(index, setter.apply(element)));
+	}
+
 	@Override
-	public void add(int index, T element) { backend.add(index, setter.apply(element)); }
+	public boolean add(T element) {
+		return backend.add(setter.apply(element));
+	}
+
 	@Override
-	public T remove(int index) { return getter.apply(backend.remove(index)); }
+	public void add(int index, T element) {
+		backend.add(index, setter.apply(element));
+	}
+
 	@Override
-	public void clear() { backend.clear(); }
+	public T remove(int index) {
+		return getter.apply(backend.remove(index));
+	}
+
+	@Override
+	public void clear() {
+		backend.clear();
+	}
+
 	@Override
 	public List<T> subList(int fromIndex, int toIndex) {
-		return new MappedListView<S, T>(backend.subList(fromIndex, toIndex), getter, setter);
+		return new MappedListView<>(backend.subList(fromIndex, toIndex), getter, setter);
 	}
+
 	@Override
 	protected void removeRange(int fromIndex, int toIndex) {
 		backend.subList(fromIndex, toIndex).clear();
 	}
+
+	@Override
+	public boolean equals(Object o) {
+		return backend.equals(o);
+	}
+
+	@Override
+	public int hashCode() {
+		return backend.hashCode();
+	}
+
+
+	@SuppressWarnings("unchecked")
+	@Override
+	public int indexOf(Object o) {
+		return backend.indexOf(setter.apply((T) o));
+	}
+
+	@SuppressWarnings("unchecked")
+	@Override
+	public int lastIndexOf(Object o) {
+		return backend.lastIndexOf(setter.apply((T) o));
+	}
+
+	@Override
+	public Iterator<T> iterator() {
+		return new Iterator<>() {
+			final Iterator<S> wrappedIt = backend.iterator();
+			@Override
+			public boolean hasNext() {
+				return wrappedIt.hasNext();
+			}
+
+			@Override
+			public T next() {
+				return getter.apply(wrappedIt.next());
+			}
+
+			@Override
+			public void remove() {
+				wrappedIt.remove();
+			}
+		};
+	}
+
+	@Override
+	public ListIterator<T> listIterator() {
+		return listIterator(0);
+	}
+
+	@Override
+	public ListIterator<T> listIterator(int index) {
+		return new ListIterator<>() {
+			final ListIterator<S> wrappedIt = backend.listIterator(index);
+			@Override
+			public boolean hasNext() {
+				return wrappedIt.hasNext();
+			}
+
+			@Override
+			public T next() {
+				return getter.apply(wrappedIt.next());
+			}
+
+			@Override
+			public boolean hasPrevious() {
+				return wrappedIt.hasPrevious();
+			}
+
+			@Override
+			public T previous() {
+				return getter.apply(wrappedIt.previous());
+			}
+
+			@Override
+			public int nextIndex() {
+				return wrappedIt.nextIndex();
+			}
+
+			@Override
+			public int previousIndex() {
+				return wrappedIt.previousIndex();
+			}
+
+			@Override
+			public void remove() {
+				wrappedIt.remove();
+			}
+
+			@Override
+			public void set(T w) {
+				wrappedIt.set(setter.apply(w));
+			}
+
+			@Override
+			public void add(T w) {
+				wrappedIt.add(setter.apply(w));
+			}
+		};
+	}
 	
 	
 	

Core/src/main/java/fr/pandacube/lib/core/util/MemoryUtil.java

@@ -30,7 +30,7 @@ public class MemoryUtil {
 			return unitMultiplier == null ? "o" : (unitMultiplier + (si ? "o" : "io"));
 		}
 		
-		private MemoryUnit(long vTrad, long vSI, String uMult) {
+		MemoryUnit(long vTrad, long vSI, String uMult) {
 			valueTrad = vTrad;
 			valueSI = vSI;
 			unitMultiplier = uMult;

Core/src/main/java/fr/pandacube/lib/core/util/MinecraftVersion.java

@@ -59,7 +59,7 @@ public enum MinecraftVersion {
 	v1_19(759, "1.19");
 	// IMPORTANT: don't forget to update the versionMergeDisplay value when adding a new version;
 	
-	private static Map<EnumSet<MinecraftVersion>, List<String>> versionMergeDisplay;
+	private static final Map<EnumSet<MinecraftVersion>, List<String>> versionMergeDisplay;
 	
 	static {
 		versionMergeDisplay = new HashMap<>();
@@ -157,7 +157,7 @@ public enum MinecraftVersion {
 	public final int id;
 	public final List<String> versionDisplay;
 
-	private MinecraftVersion(int v, String... d) {
+	MinecraftVersion(int v, String... d) {
 		id = v;
 		versionDisplay = Arrays.asList(d);
 	}
@@ -193,7 +193,7 @@ public enum MinecraftVersion {
 	}
 	
 	
-	public static final List<String> getVersionsDisplayList(List<MinecraftVersion> vList) {
+	public static List<String> getVersionsDisplayList(List<MinecraftVersion> vList) {
 		if (vList == null)
 			return new ArrayList<>();
 		Set<MinecraftVersion> vSet = EnumSet.copyOf(vList);

Core/src/main/java/fr/pandacube/lib/core/util/MinecraftWebUtil.java

@@ -7,8 +7,6 @@ public class MinecraftWebUtil {
 
 	/**
 		Convert a legacy Minecraft color coded String into HTML Format.
-		
-		@param 
 	*/
 	// TODO update to support RGB colors (Bungee and Essentials notation).
 	// See JavaScript implementation at https://www.pandacube.fr/assets/js/global.js
@@ -16,7 +14,7 @@ public class MinecraftWebUtil {
 	{
 		String color_char = "0123456789abcdefr";
 		
-		String builder = "";
+		StringBuilder builder = new StringBuilder();
 		char currentColor = 'r';
 		boolean bold = false, italic = false, underlined = false, strikethrough = false;
 		
@@ -26,67 +24,67 @@ public class MinecraftWebUtil {
 			if (c == code_prefix && (i<ligne.length()-1)) {
 				i++;
 				c = ligne.charAt(i);
-				if (color_char.contains(new String(new char[] {Character.toLowerCase(c)}))) {
+				if (color_char.contains(String.valueOf(Character.toLowerCase(c)))) {
 					if (bold) {
-						builder += "</span>";
+						builder.append("</span>");
 						bold = false;
 					}
 					if (italic) {
-						builder += "</span>";
+						builder.append("</span>");
 						italic = false;
 					}
 					if (underlined) {
-						builder += "</span>";
+						builder.append("</span>");
 						underlined = false;
 					}
 					if (strikethrough) {
-						builder += "</span>";
+						builder.append("</span>");
 						strikethrough = false;
 					}
 					if (Character.toLowerCase(c) != currentColor) {
 						if (currentColor != 'r')
-							builder += "</span>";
+							builder.append("</span>");
 						if (Character.toLowerCase(c) != 'r')
-							builder += "<span class=\"c" + Character.toUpperCase(c) + "\">";
+							builder.append("<span class=\"c").append(Character.toUpperCase(c)).append("\">");
 						currentColor = Character.toLowerCase(c);
 					}
 					
 				}
 				else if (Character.toLowerCase(c) == 'l') {
 					if (!bold) {
-						builder += "<span class=\"cL\">";
+						builder.append("<span class=\"cL\">");
 						bold = true;
 					}
 				}
 				else if (Character.toLowerCase(c) == 'm') {
 					if (!strikethrough) {
-						builder += "<span class=\"cM\">";
+						builder.append("<span class=\"cM\">");
 						strikethrough = true;
 					}
 				}
 				else if (Character.toLowerCase(c) == 'n') {
 					if (!underlined) {
-						builder += "<span class=\"cN\">";
+						builder.append("<span class=\"cN\">");
 						underlined = true;
 					}
 				}
 				else if (Character.toLowerCase(c) == 'o') {
 					if (!italic) {
-						builder += "<span class=\"cO\">";
+						builder.append("<span class=\"cO\">");
 						italic = true;
 					}
 				}
 				else {
-					builder += code_prefix + c;
+					builder.append(code_prefix + c);
 				}
 				
 				
 			}
 			else
-				builder += c;
+				builder.append(c);
 		}
 		
-		return builder;
+		return builder.toString();
 		
 	}
 	

Core/src/main/java/fr/pandacube/lib/core/util/OfflineUUID.java

@@ -1,6 +1,6 @@
 package fr.pandacube.lib.core.util;
 
-import java.nio.charset.Charset;
+import java.nio.charset.StandardCharsets;
 import java.util.Objects;
 import java.util.Scanner;
 import java.util.UUID;
@@ -8,7 +8,7 @@ import java.util.UUID;
 public class OfflineUUID {
 
 	public static UUID getFromNickName(String nickname) {
-		byte[] from_str = ("OfflinePlayer:" + nickname).getBytes(Charset.forName("UTF-8"));
+		byte[] from_str = ("OfflinePlayer:" + nickname).getBytes(StandardCharsets.UTF_8);
 		return UUID.nameUUIDFromBytes(from_str);
 	}
 

Core/src/main/java/fr/pandacube/lib/core/util/RandomUtil.java

@@ -6,7 +6,7 @@ import java.util.Set;
 
 public class RandomUtil {
 
-	public static Random rand = new Random();
+	public static final Random rand = new Random();
 
 	public static int nextIntBetween(int minInclu, int maxExclu) {
 		return rand.nextInt(maxExclu - minInclu) + minInclu;
@@ -32,8 +32,8 @@ public class RandomUtil {
 	 * Returns a random value from a set.
 	 * 
 	 * May not be optimized (Actually O(n) )
-	 * @param arr
+	 * @param set the Set from which to pick a random value
-	 * @return
+	 * @return a random value from the set
 	 */
 	public static <T> T setElement(Set<T> set) {
 		if (set.isEmpty())
@@ -51,26 +51,26 @@ public class RandomUtil {
 	 * Return a value between 0 and the number of parameter minus 1, using the provided frequencies.
 	 * 
 	 * The probability of each value to be returned depends of the frequencies provided.
-	 * @param frequencies the frequencies of each entries
+	 * @param f the frequencies of each entries
 	 * @return the index of an entry, or -1 if it is unable to pick anything (all the frequencies are 0 or there is not provided frequency)
 	 */
-	public static int randomIndexOfFrequencies(double... frequencies) {
+	public static int randomIndexOfFrequencies(double... f) {
-		if (frequencies == null)
+		if (f == null)
-			return -1;
+			throw new IllegalArgumentException("f cannot be null");
+		int n = f.length;
+		double[] fSums = new double[n];
 		double sum = 0;
-		for (double f : frequencies)
+		for (int i = 0; i < n; i++) {
-			sum += f;
+			if (f[i] < 0)
-		if (sum == 0)
+				throw new IllegalArgumentException("f[" + i + "] cannot be negative.");
-			return -1;
+			fSums[i] = (sum += f[i]);
-		double r = rand.nextDouble() * sum;
-		int i = -1;
-		double limit = frequencies[++i];
-		while (i < frequencies.length) {
-			if (r < limit)
-				return i;
-			limit += frequencies[++i];
 		}
-		return frequencies.length - 1;
+		double r = rand.nextDouble() * sum;
+		for (int i = 0; i < n; i++) {
+			if (fSums[i] > r)
+				return i;
+		}
+		return n - 1;
 	}
 	
 	
@@ -81,7 +81,7 @@ public class RandomUtil {
 	public static final String PASSWORD_CHARSET_LATIN_LOWERCASE = "abcdefghijklmnopqrstuvwxyz";
 	public static final String PASSWORD_CHARSET_LATIN_UPPERCASE = PASSWORD_CHARSET_LATIN_LOWERCASE.toUpperCase();
 	public static final String PASSWORD_CHARSET_DIGIT = "0123456789";
-	public static final String PASSWORD_CHARSET_SPECIAL = "@#+*/-;:,.?!='()[]{}&\"\\";
+	public static final String PASSWORD_CHARSET_SPECIAL = "@#+*/-;:,.?!='()[]{}&";
 	public static final String PASSWORD_CHARSET_NO_ANBIGUITY = "abcdefghkmnpqrstwxyzACDEFGHKLMNPQRSTWXYZ2345679";
 
 	public static String randomPassword(int length) {

Core/src/main/java/fr/pandacube/lib/core/util/Reflect.java

@@ -4,6 +4,7 @@ import java.lang.reflect.Constructor;
 import java.lang.reflect.Field;
 import java.lang.reflect.Method;
 import java.lang.reflect.Modifier;
+import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collections;
 import java.util.HashMap;
@@ -73,7 +74,7 @@ public class Reflect {
 		}
     	@Override
     	public boolean equals(Object other) {
-			return other != null && other instanceof MethodIdentifier o
+			return other instanceof MethodIdentifier o
 					&& o.methodName.equals(methodName)
 					&& Arrays.equals(o.parameters, parameters);
 		}
@@ -89,7 +90,7 @@ public class Reflect {
 		}
     	@Override
     	public boolean equals(Object other) {
-			return other != null && other instanceof ConstructorIdentifier o
+			return other instanceof ConstructorIdentifier o
 					&& Arrays.equals(o.parameters, parameters);
 		}
     	@Override
@@ -196,10 +197,10 @@ public class Reflect {
 	
 	
 	public static abstract class ReflectMember<T, ID, EL, EX extends ReflectiveOperationException> {
-		ReflectClass<T> reflectClass;
+		protected final ReflectClass<T> reflectClass;
-		protected ID identifier;
+		protected final ID identifier;
 		
-		protected EL cached;
+		protected final EL cached;
 		
 		protected ReflectMember(ReflectClass<T> c, ID id, boolean bypassFilter) throws EX {
 			reflectClass = c;
@@ -210,78 +211,71 @@ public class Reflect {
 		
 		
 		protected EL fetch() throws EX {
-			EX ex = null;
 			
 			// get element in current class
 			try {
 				EL el = fetchFromClass(reflectClass.clazz);
 				setAccessible(el);
 				return el;
-			} catch (ReflectiveOperationException e) {
+			} catch (ReflectiveOperationException e1) {
 				@SuppressWarnings("unchecked")
-				EX ee = (EX) e;
+				EX ex = (EX) e1;
-				ex = ee;
+
+				// get parent class
+				Class<? super T> superClass = reflectClass.clazz.getSuperclass();
+				if (superClass == null)
+					throw ex;
+
+				// get element in parent class (will do recursion)
+				try {
+					EL el = fetchFromReflectClass(ofClass(superClass));
+					setAccessible(el);
+					return el;
+				} catch (ReflectiveOperationException e2) {
+					ex.addSuppressed(e2);
+					throw ex;
+				}
 			}
-			
-			// get parent class
-			Class<? super T> superClass = reflectClass.clazz.getSuperclass();
-			if (superClass == null)
-				throw ex;
-			
-			// get element in parent class (will do recursion)
-			try {
-				EL el = fetchFromReflectClass(ofClass(superClass));
-				setAccessible(el);
-				return el;
-			} catch (ReflectiveOperationException e) {
-				ex.addSuppressed(e);
-				throw ex;
-			}
-			
 		}
 		
 		protected EL fetchFiltered() throws EX {
-			EX ex = null;
 
 			// get element in current class
 			try {
 				EL el = fetchFromClass(reflectClass.clazz);
 				setAccessible(el);
 				return el;
-			} catch (ReflectiveOperationException e) {
+			} catch (ReflectiveOperationException e1) {
 				@SuppressWarnings("unchecked")
-				EX ee = (EX) e;
+				EX ex = (EX) e1;
-				ex = ee;
+
+				// trying to bypass filtered member
+				try {
+					@SuppressWarnings("unchecked")
+					EL[] elements = (EL[]) Reflect.ofClassOfInstance(reflectClass.clazz)
+							.method(internalMethodNameElementArray(), boolean.class)
+							.invoke(reflectClass.clazz, false);
+					for (EL element : elements) {
+						if (isEqualOurElement(element)) {
+							// the values in the elements array have to be copied
+							// (using special private methods in reflection api) before using it
+							Object reflectionFactoryOfClazz = Reflect.ofClassOfInstance(reflectClass.clazz)
+									.method("getReflectionFactory")
+									.invoke(reflectClass.clazz);
+							@SuppressWarnings("unchecked")
+							EL copiedElement = (EL) Reflect.ofClassOfInstance(reflectionFactoryOfClazz)
+									.method(internalMethodNameCopyElement(), element.getClass())
+									.invoke(reflectionFactoryOfClazz, element);
+							setAccessible(copiedElement);
+							return copiedElement;
+						}
+					}
+				} catch (ReflectiveOperationException e2) {
+					ex.addSuppressed(e2);
+				}
+
+				throw ex;
 			}
-			
-			// trying to bypass filtered member
-			try {
-				@SuppressWarnings("unchecked")
-				EL[] elements = (EL[]) Reflect.ofClassOfInstance(reflectClass.clazz)
-						.method(internalMethodNameElementArray(), boolean.class)
-						.invoke(reflectClass.clazz, false);
-				for (EL element : elements) {
-					if (isEqualOurElement(element)) {
-						// the values in the elements array have to be copied
-						// (using special private methods in reflection api) before using it
-						Object reflectionFactoryOfClazz = Reflect.ofClassOfInstance(reflectClass.clazz)
-								.method("getReflectionFactory")
-								.invoke(reflectClass.clazz);
-						@SuppressWarnings("unchecked")
-						EL copiedElement = (EL) Reflect.ofClassOfInstance(reflectionFactoryOfClazz)
-								.method(internalMethodNameCopyElement(), element.getClass())
-								.invoke(reflectionFactoryOfClazz, element);
-						EL el = copiedElement;
-						setAccessible(el);
-			            return el;
-			        }
-			    }
-			} catch (ReflectiveOperationException e) {
-				ex.addSuppressed(e);
-			}
-			
-			throw ex;
-			
 		}
 		
 		protected abstract EL fetchFromClass(Class<T> clazz) throws EX;
@@ -311,11 +305,11 @@ public class Reflect {
 			super(c, name, bypassFilter);
 		}
 
-		@Override protected Field fetchFromClass(Class<T> clazz) throws NoSuchFieldException { return clazz.getDeclaredField(identifier); };
+		@Override protected Field fetchFromClass(Class<T> clazz) throws NoSuchFieldException { return clazz.getDeclaredField(identifier); }
-		@Override protected Field fetchFromReflectClass(ReflectClass<?> rc) throws NoSuchFieldException { return rc.field(identifier).get(); };
+		@Override protected Field fetchFromReflectClass(ReflectClass<?> rc) throws NoSuchFieldException { return rc.field(identifier).get(); }
-		@Override protected boolean isEqualOurElement(Field el) { return identifier.equals(el.getName()); };
+		@Override protected boolean isEqualOurElement(Field el) { return identifier.equals(el.getName()); }
-		@Override protected String internalMethodNameElementArray() { return "getDeclaredFields0"; };
+		@Override protected String internalMethodNameElementArray() { return "getDeclaredFields0"; }
-		@Override protected String internalMethodNameCopyElement() { return "copyField"; };
+		@Override protected String internalMethodNameCopyElement() { return "copyField"; }
 		@Override protected void setAccessible(Field el) { el.setAccessible(true); }
 		
 		
@@ -379,11 +373,11 @@ public class Reflect {
 			super(c, methodId, bypassFilter);
 		}
 
-		@Override protected Method fetchFromClass(Class<T> clazz) throws NoSuchMethodException { return clazz.getDeclaredMethod(identifier.methodName, identifier.parameters); };
+		@Override protected Method fetchFromClass(Class<T> clazz) throws NoSuchMethodException { return clazz.getDeclaredMethod(identifier.methodName, identifier.parameters); }
-		@Override protected Method fetchFromReflectClass(ReflectClass<?> rc) throws NoSuchMethodException { return rc.method(identifier, false).get(); };
+		@Override protected Method fetchFromReflectClass(ReflectClass<?> rc) throws NoSuchMethodException { return rc.method(identifier, false).get(); }
-		@Override protected boolean isEqualOurElement(Method el) { return identifier.methodName.equals(el.getName()) && Arrays.equals(identifier.parameters, el.getParameterTypes()); };
+		@Override protected boolean isEqualOurElement(Method el) { return identifier.methodName.equals(el.getName()) && Arrays.equals(identifier.parameters, el.getParameterTypes()); }
-		@Override protected String internalMethodNameElementArray() { return "getDeclaredMethods0"; };
+		@Override protected String internalMethodNameElementArray() { return "getDeclaredMethods0"; }
-		@Override protected String internalMethodNameCopyElement() { return "copyMethod"; };
+		@Override protected String internalMethodNameCopyElement() { return "copyMethod"; }
 		@Override protected void setAccessible(Method el) { el.setAccessible(true); }
 		
 		public Object invoke(Object instance, Object... values) throws ReflectiveOperationException {
@@ -415,17 +409,16 @@ public class Reflect {
 		// Override since we don't want to recursively search for a constructor
 		@Override
 		protected Constructor<T> fetch() throws NoSuchMethodException {
-			Constructor<T> el = null;
+			Constructor<T> el = fetchFromClass(reflectClass.clazz);
-			el = fetchFromClass(reflectClass.clazz);
 			setAccessible(el);
 			return el;
 		}
 
-		@Override protected Constructor<T> fetchFromClass(Class<T> clazz) throws NoSuchMethodException { return clazz.getDeclaredConstructor(identifier.parameters); };
+		@Override protected Constructor<T> fetchFromClass(Class<T> clazz) throws NoSuchMethodException { return clazz.getDeclaredConstructor(identifier.parameters); }
-		@Override protected Constructor<T> fetchFromReflectClass(ReflectClass<?> rc) throws NoSuchMethodException { throw new UnsupportedOperationException(); };
+		@Override protected Constructor<T> fetchFromReflectClass(ReflectClass<?> rc) { throw new UnsupportedOperationException(); }
-		@Override protected boolean isEqualOurElement(Constructor<T> el) { return Arrays.equals(identifier.parameters, el.getParameterTypes()); };
+		@Override protected boolean isEqualOurElement(Constructor<T> el) { return Arrays.equals(identifier.parameters, el.getParameterTypes()); }
-		@Override protected String internalMethodNameElementArray() { return "getDeclaredConstructors0"; };
+		@Override protected String internalMethodNameElementArray() { return "getDeclaredConstructors0"; }
-		@Override protected String internalMethodNameCopyElement() { return "copyConstructor"; };
+		@Override protected String internalMethodNameCopyElement() { return "copyConstructor"; }
 		@Override protected void setAccessible(Constructor<T> el) { el.setAccessible(true); }
 		
 		public T instanciate(Object... values) throws ReflectiveOperationException {
@@ -453,7 +446,7 @@ public class Reflect {
     
     
     
-    private static Cache<Class<?>, List<Class<?>>> subClassesLists = CacheBuilder.newBuilder()
+    private static final Cache<Class<?>, List<Class<?>>> subClassesLists = CacheBuilder.newBuilder()
 			.expireAfterAccess(10, TimeUnit.MINUTES)
 			.build();
 	
@@ -468,7 +461,7 @@ public class Reflect {
 			return classes;
 		} catch(ExecutionException e) {
 			Log.severe(e);
-			return null;
+			return new ArrayList<>();
 		}
 		
 	}

Core/src/main/java/fr/pandacube/lib/core/util/ServerPropertyFile.java

@@ -6,12 +6,13 @@ import java.io.File;
 import java.io.FileReader;
 import java.io.FileWriter;
 import java.io.IOException;
+import java.util.Objects;
 
 import com.google.gson.JsonSyntaxException;
 
 public class ServerPropertyFile {
 
-	private transient File file;
+	private final transient File file;
 	
 	private String name = "default_name";
 	private String memory = "512M";
@@ -22,8 +23,7 @@ public class ServerPropertyFile {
 	private boolean run = true;
 
 	public ServerPropertyFile(File f) {
-		if (f == null) throw new IllegalArgumentException("f ne doit pas être null");
+		file = Objects.requireNonNull(f, "f");
-		file = f;
 
 	}
 
@@ -101,7 +101,7 @@ public class ServerPropertyFile {
 	}
 
 	public void setMemory(String m) {
-		if (m == null || !m.matches("^[0-9]+[mgMG]$")) throw new IllegalArgumentException();
+		if (m == null || !m.matches("^\\d+[mgMG]$")) throw new IllegalArgumentException();
 		memory = m;
 	}
 

Core/src/main/java/fr/pandacube/lib/core/util/ThrowableUtil.java

@@ -4,6 +4,7 @@ import java.io.ByteArrayOutputStream;
 import java.io.IOException;
 import java.io.PrintStream;
 import java.lang.reflect.InvocationTargetException;
+import java.nio.charset.StandardCharsets;
 
 public class ThrowableUtil {
 	
@@ -11,11 +12,11 @@ public class ThrowableUtil {
 	public static String stacktraceToString(Throwable t) {
 		if (t == null) return null;
 		try (ByteArrayOutputStream os = new ByteArrayOutputStream()) {
-			try (PrintStream ps = new PrintStream(os, false, "UTF-8")) {
+			try (PrintStream ps = new PrintStream(os, false, StandardCharsets.UTF_8)) {
 				t.printStackTrace(ps);
 				ps.flush();
 			}
-			return os.toString("UTF-8");
+			return os.toString(StandardCharsets.UTF_8);
 		} catch (IOException e) {
 			return null;
 		}
@@ -90,7 +91,7 @@ public class ThrowableUtil {
 	 */
 	@FunctionalInterface
 	public interface SupplierException<T> {
-		public T get() throws Exception;
+		T get() throws Exception;
 	}
 
 
@@ -100,7 +101,7 @@ public class ThrowableUtil {
 	 */
 	@FunctionalInterface
 	public interface RunnableException {
-		public void run() throws Exception;
+		void run() throws Exception;
 	}
 
 
@@ -135,10 +136,6 @@ public class ThrowableUtil {
 				er = new InstantiationError();
 				er.initCause(ce);
 			}
-			else if (t instanceof IllegalAccessException ce) {
-				er = new IllegalAccessError();
-				er.initCause(ce);
-			}
 			if (er != null)
 				throw er;
 

Core/src/main/java/fr/pandacube/lib/core/util/Tick.java

@@ -14,7 +14,7 @@ public class Tick {
 	
 	/**
 	 * Returns the number of tick is the provided duration, in second
-	 * @param seconds the duration in second
+	 * @param minutes the duration in minutes
 	 * @return the same duration as provided, but in Minecraft server ticks
 	 */
 	public static long min(long minutes) {

Core/src/main/java/fr/pandacube/lib/core/util/TimeUtil.java

@@ -1,5 +1,7 @@
 package fr.pandacube.lib.core.util;
 
+import fr.pandacube.lib.core.commands.SuggestionsSupplier;
+
 import java.time.Instant;
 import java.time.LocalDateTime;
 import java.time.format.DateTimeFormatter;
@@ -7,10 +9,10 @@ import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Calendar;
 import java.util.Collections;
+import java.util.Comparator;
 import java.util.GregorianCalendar;
 import java.util.List;
 import java.util.Locale;
-import java.util.Objects;
 import java.util.TimeZone;
 import java.util.concurrent.TimeUnit;
 import java.util.concurrent.atomic.AtomicBoolean;
@@ -19,21 +21,19 @@ import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 import java.util.stream.Collectors;
 
-import fr.pandacube.lib.core.commands.SuggestionsSupplier;
-
 public class TimeUtil {
 	
 
-	private static DateTimeFormatter cmpDayOfWeekFormatter = DateTimeFormatter.ofPattern("EEE", Locale.getDefault());
+	private static final DateTimeFormatter cmpDayOfWeekFormatter = DateTimeFormatter.ofPattern("EEE", Locale.getDefault());
-	private static DateTimeFormatter dayOfWeekFormatter = DateTimeFormatter.ofPattern("EEEE", Locale.getDefault());
+	private static final DateTimeFormatter dayOfWeekFormatter = DateTimeFormatter.ofPattern("EEEE", Locale.getDefault());
-	private static DateTimeFormatter dayOfMonthFormatter = DateTimeFormatter.ofPattern("d", Locale.getDefault());
+	private static final DateTimeFormatter dayOfMonthFormatter = DateTimeFormatter.ofPattern("d", Locale.getDefault());
-	private static DateTimeFormatter cmpMonthFormatter = DateTimeFormatter.ofPattern("MMM", Locale.getDefault());
+	private static final DateTimeFormatter cmpMonthFormatter = DateTimeFormatter.ofPattern("MMM", Locale.getDefault());
-	private static DateTimeFormatter monthFormatter = DateTimeFormatter.ofPattern("MMMM", Locale.getDefault());
+	private static final DateTimeFormatter monthFormatter = DateTimeFormatter.ofPattern("MMMM", Locale.getDefault());
-	private static DateTimeFormatter yearFormatter = DateTimeFormatter.ofPattern("uuuu", Locale.getDefault());
+	private static final DateTimeFormatter yearFormatter = DateTimeFormatter.ofPattern("uuuu", Locale.getDefault());
 
-	private static DateTimeFormatter HMSFormatter = DateTimeFormatter.ofPattern("HH:mm:ss", Locale.getDefault());
+	private static final DateTimeFormatter HMSFormatter = DateTimeFormatter.ofPattern("HH:mm:ss", Locale.getDefault());
-	private static DateTimeFormatter HMFormatter = DateTimeFormatter.ofPattern("HH:mm", Locale.getDefault());
+	private static final DateTimeFormatter HMFormatter = DateTimeFormatter.ofPattern("HH:mm", Locale.getDefault());
-	private static DateTimeFormatter HFormatter = DateTimeFormatter.ofPattern("H'h'", Locale.getDefault());
+	private static final DateTimeFormatter HFormatter = DateTimeFormatter.ofPattern("H'h'", Locale.getDefault());
 	
 
 	public static String relativeDateFr(long displayTime, boolean showSeconds, boolean compactWords) {
@@ -67,7 +67,7 @@ public class TimeUtil {
 				if (timeDiffSec > -60*2) // dans 2 min
 					return compactWords ? "dans 1min" : "dans une minute";
 				if (timeDiffSec > -3600) // dans moins d’1h
-					return "dans " + (int)Math.floor((-timeDiffSec)/60) + (compactWords ? "min" : " minutes");
+					return "dans " + (-timeDiffSec/60) + (compactWords ? "min" : " minutes");
 			}
 			if (relPrecision.morePreciseOrEqTo(RelativePrecision.HOURS)) {
 				if (timeDiffSec > -3600) // dans moins d’1h
@@ -75,7 +75,7 @@ public class TimeUtil {
 				if (timeDiffSec > -3600*2) // dans moins de 2h
 					return compactWords ? "dans 1h" : "dans une heure";
 				if (timeDiffSec > -3600*12) // dans moins de 12h
-					return "dans " + (int)Math.floor((-timeDiffSec)/3600) + (compactWords ? "h" : " heures");
+					return "dans " + (-timeDiffSec/3600) + (compactWords ? "h" : " heures");
 			}
 			if (relPrecision.morePreciseOrEqTo(RelativePrecision.DAYS)) {
 				LocalDateTime nextMidnight = LocalDateTime.of(currentDateTime.getYear(), currentDateTime.getMonth(), currentDateTime.getDayOfMonth(), 0, 0).plusDays(1);
@@ -88,9 +88,7 @@ public class TimeUtil {
 							+ dayOfMonthFormatter.format(displayDateTime) + " à "
 							+ dayTimeFr(displayTime, dispPrecision);
 			}
-			
+
-			return fullDateFr(displayTime, dispPrecision, true, compactWords);
-			
 		}
 		else {
 			// present and past
@@ -107,7 +105,7 @@ public class TimeUtil {
 				if (timeDiffSec < 60*2) // ya moins de 2 min
 					return compactWords ? "il y a 1min" : "il y a une minute";
 				if (timeDiffSec < 3600) // ya moins d'1h
-					return "il y a " + (int)Math.floor(timeDiffSec/60) + (compactWords ? "min" : " minutes");
+					return "il y a " + (timeDiffSec/60) + (compactWords ? "min" : " minutes");
 			}
 			if (relPrecision.morePreciseOrEqTo(RelativePrecision.HOURS)) {
 				if (timeDiffSec < 3600) // ya moins d'1h
@@ -115,7 +113,7 @@ public class TimeUtil {
 				if (timeDiffSec < 3600*2) // ya moins de 2h
 					return "il y a une heure";
 				if (timeDiffSec < 3600*12) // ya moins de 12h
-					return "il y a " + (int)Math.floor(timeDiffSec/3600) + " heures";
+					return "il y a " + (timeDiffSec/3600) + " heures";
 			}
 			if (relPrecision.morePreciseOrEqTo(RelativePrecision.DAYS)) {
 				LocalDateTime lastMidnight = LocalDateTime.of(currentDateTime.getYear(), currentDateTime.getMonth(), currentDateTime.getDayOfMonth(), 0, 0);
@@ -127,11 +125,10 @@ public class TimeUtil {
 					return (compactWords ? cmpDayOfWeekFormatter : dayOfWeekFormatter).format(displayDateTime) + " dernier à "
 							+ dayTimeFr(displayTime, dispPrecision);
 			}
-			
+
-			return fullDateFr(displayTime, dispPrecision, true, compactWords);
-			
 		}
-		
+		return fullDateFr(displayTime, dispPrecision, true, compactWords);
+
 	}
 	
 	
@@ -207,7 +204,7 @@ public class TimeUtil {
 		String ret = Arrays.stream(TimeUnit.values())
 				.sequential()
 				.filter(u -> u.compareTo(fLUnit) >= 0 && u.compareTo(fHUnit) <= 0)
-				.sorted((u1, u2) -> u2.compareTo(u1))
+				.sorted(Comparator.reverseOrder())
 				.filter(u -> {
 					if (u.convert(remainingTime.get(), TimeUnit.MILLISECONDS) == 0 && !oneDisplayed.get())
 						return false;
@@ -226,40 +223,23 @@ public class TimeUtil {
 	
 	
 	public static String timeUnitToSuffix(TimeUnit u, boolean fr) {
-		switch (u) {
+		return switch (u) {
-		case DAYS:
+			case DAYS -> fr ? "j" : "d";
-			return fr ? "j" : "d";
+			case HOURS -> "h";
-		case HOURS:
+			case MINUTES -> "m";
-			return "h";
+			case SECONDS -> "s";
-		case MINUTES:
+			case MILLISECONDS -> "ms";
-			return "m";
+			case MICROSECONDS -> "μs";
-		case SECONDS:
+			case NANOSECONDS -> "ns";
-			return "s";
+		};
-		case MILLISECONDS:
-			return "ms";
-		case MICROSECONDS:
-			return "μs";
-		case NANOSECONDS:
-			return "ns";
-		default:
-			throw new IllegalArgumentException("Invalid TimeUnit: " + Objects.toString(u));
-		}
 	}
 	
 	public static int timeUnitToLeftPadLength(TimeUnit u) {
-		switch (u) {
+		return switch (u) {
-		case NANOSECONDS:
+			case NANOSECONDS, MICROSECONDS, MILLISECONDS -> 3;
-		case MICROSECONDS:
+			case SECONDS, MINUTES, HOURS -> 2;
-		case MILLISECONDS:
+			case DAYS -> 1;
-			return 3;
+		};
-		case SECONDS:
-		case MINUTES:
-		case HOURS:
-			return 2;
-		case DAYS:
-		default:
-			return 1;
-		}
 	}
 	
 	public static String toString(long value, int leftPad) {
@@ -279,7 +259,6 @@ public class TimeUtil {
 	 * Equivalent to {@link #durationToLongString(long, TimeUnit, TimeUnit, boolean, boolean, boolean) TimeUnit.durationToLongString(msDuration, TimeUnit.DAYS, milliseconds ? TimeUnit.MILLISECONDS : TimeUnit.SECONDS, true, true, false)}
 	 * @param msDuration the duration in ms
 	 * @param milliseconds if the milliseconds are displayed or not
-	 * @return
 	 */
 	public static String durationToString(long msDuration, boolean milliseconds) {
 		return durationToLongString(msDuration, TimeUnit.DAYS, milliseconds ? TimeUnit.MILLISECONDS : TimeUnit.SECONDS, true, true, false);
@@ -287,8 +266,7 @@ public class TimeUtil {
 
 	/**
 	 * Equivalent to {@link #durationToLongString(long, TimeUnit, TimeUnit, boolean, boolean, boolean) TimeUnit.durationToLongString(msDuration, TimeUnit.DAYS, TimeUnit.SECONDS, true, true, false)}
-	 * @param msDuration
+	 * @param msDuration the duration in ms
-	 * @return
 	 */
 	public static String durationToString(long msDuration) {
 		return durationToLongString(msDuration, TimeUnit.DAYS, TimeUnit.SECONDS, true, true, false);
@@ -296,8 +274,7 @@ public class TimeUtil {
 	
 	/**
 	 * Equivalent to {@link #durationToLongString(long, TimeUnit, TimeUnit, boolean, boolean, boolean) TimeUnit.durationToLongString(msDuration, TimeUnit.DAYS, TimeUnit.SECONDS, false, false, false)}
-	 * @param msDuration
+	 * @param msDuration the duration in ms
-	 * @return
 	 */
 	public static String durationToParsableString(long msDuration) {
 		return durationToLongString(msDuration, TimeUnit.DAYS, TimeUnit.SECONDS, false, false, false);
@@ -306,9 +283,10 @@ public class TimeUtil {
 
 	
 	/**
-	 * @see {@link com.earth2me.essentials.utils.DateUtil#parseDuration(String, boolean)}
+	 * @see <a href="https://github.com/EssentialsX/Essentials/blob/2.x/Essentials/src/main/java/com/earth2me/essentials/utils/DateUtil.java">Essentials DateUtil#parseDuration(String, boolean)</a>
 	 */
 	public static long parseDuration(String time, boolean future) throws Exception {
+		@SuppressWarnings("RegExpSimplifiable")
 		Pattern timePattern = Pattern.compile("(?:([0-9]+)\\s*y[a-z]*[,\\s]*)?" + "(?:([0-9]+)\\s*mo[a-z]*[,\\s]*)?"
 				+ "(?:([0-9]+)\\s*w[a-z]*[,\\s]*)?" + "(?:([0-9]+)\\s*d[a-z]*[,\\s]*)?"
 				+ "(?:([0-9]+)\\s*h[a-z]*[,\\s]*)?" + "(?:([0-9]+)\\s*m[a-z]*[,\\s]*)?"
@@ -367,17 +345,13 @@ public class TimeUtil {
 			List<String> remainingSuffixes = new ArrayList<>(allSuffixes);
 			char[] tokenChars = token.toCharArray();
 			String accSuffix = "";
-			for (int i = 0; i < tokenChars.length; i++) {
+			for (char c : tokenChars) {
-				char c = tokenChars[i];
 				if (Character.isDigit(c)) {
 					scanAndRemovePastSuffixes(remainingSuffixes, accSuffix);
 					accSuffix = "";
-					continue;
+				} else if (Character.isLetter(c)) {
-				}
-				else if (Character.isLetter(c)) {
 					accSuffix += c;
-				}
+				} else
-				else
 					return Collections.emptyList();
 			}
 			String prefixToken = token.substring(0, token.length() - accSuffix.length());
@@ -388,14 +362,12 @@ public class TimeUtil {
 		};
 	}
 	
-	private static List<String> allSuffixes = Arrays.asList("y", "mo", "w", "d", "h", "m", "s");
+	private static final List<String> allSuffixes = Arrays.asList("y", "mo", "w", "d", "h", "m", "s");
-	private static List<String> emptyTokenSuggestions = allSuffixes.stream().map(p -> "1" + p).collect(Collectors.toList());
+	private static final List<String> emptyTokenSuggestions = allSuffixes.stream().map(p -> "1" + p).collect(Collectors.toList());
 	private static void scanAndRemovePastSuffixes(List<String> suffixes, String foundSuffix) {
 		for (int i = 0; i < suffixes.size(); i++) {
 			if (foundSuffix.startsWith(suffixes.get(i))) {
-				for (int j = i; j >= 0; j--) {
+				suffixes.subList(0, i + 1).clear();
-					suffixes.remove(j);
-				}
 				return;
 			}
 		}

Core/src/main/java/fr/pandacube/lib/core/util/TypeConverter.java

@@ -116,9 +116,7 @@ public class TypeConverter {
 	 * @param o the object to convert to good type
 	 * @param mapIntKeys if the String key representing an int should be duplicated as integer type,
 	 * which map to the same value as the original String key. For example, if a key is "12" and map
-	 * to the object <i>o</i>, an integer key 12 will be added and map to the same object 
+	 * to the object <i>o</i>, an integer key 12 will be added and map to the same object <i>o</i>
-	 * <i>o</i>
-	 * @return
 	 */
 	@SuppressWarnings("unchecked")
 	public static Map<Object, Object> toMap(Object o, boolean mapIntKeys) {
@@ -139,7 +137,7 @@ public class TypeConverter {
 						try {
 							int intKey = Integer.parseInt((String)entry.getKey());
 							newEntries.put(intKey, entry.getValue());
-						} catch (NumberFormatException e) { }
+						} catch (NumberFormatException ignored) { }
 					}
 				}
 				if (!newEntries.isEmpty()) {
@@ -150,8 +148,7 @@ public class TypeConverter {
 			return currMap;
 		}
 		
-		if (o instanceof List) {
+		if (o instanceof List<?> list) {
-			List<?> list = (List<?>) o;
 			Map<Object, Object> map = new HashMap<>();
 			for(int i = 0; i < list.size(); i++) {
 				map.put(Integer.toString(i), list.get(i));
@@ -200,7 +197,6 @@ public class TypeConverter {
 	
 	
 	public static class ConvertionException extends RuntimeException {
-		private static final long serialVersionUID = 1L;
 		
 		public ConvertionException(String m) {
 			super(m);

Paper/src/main/java/fr/pandacube/lib/paper/gui/GUIHotBar.java

@@ -30,13 +30,13 @@ import fr.pandacube.lib.paper.util.BukkitEvent;
  */
 public class GUIHotBar implements Listener {
 
-	private Map<ItemStack, BiConsumer<PlayerInventory, ItemStack>> itemsAndSetters = new HashMap<>();
+	private final Map<ItemStack, BiConsumer<PlayerInventory, ItemStack>> itemsAndSetters = new HashMap<>();
 	
-	private Map<ItemStack, Consumer<Player>> itemsAndRunnables = new HashMap<>();
+	private final Map<ItemStack, Consumer<Player>> itemsAndRunnables = new HashMap<>();
 	
 	private final int defltSlot;
 	
-	private List<Player> currentPlayers = new ArrayList<>();
+	private final List<Player> currentPlayers = new ArrayList<>();
 	
 	public GUIHotBar(int defaultSlot) {
 		defltSlot = Math.max(0, Math.min(8, defaultSlot));
@@ -50,7 +50,6 @@ public class GUIHotBar implements Listener {
 	 * @param i the item stack
 	 * @param setter code executed to put the item in the inventory. Additionally check for permission before doing the addition.
 	 * @param run the Runnable to run when the user right click on the item in the hotbar.
-	 * @return
 	 */
 	public GUIHotBar addItem(ItemStack i, BiConsumer<PlayerInventory, ItemStack> setter, Consumer<Player> run) {
 		itemsAndSetters.put(i, setter);
@@ -65,8 +64,7 @@ public class GUIHotBar implements Listener {
 	/**
 	 * Add the hotbar elements to this player.
 	 * 
-	 * The players is automatically removed when it quit. You can remove it before by calling {@link #removePlayer(Player)}.
+	 * The players is automatically removed when they quit. You can remove it before by calling {@link #removePlayer(Player)}.
-	 * @param p
 	 */
 	public void addPlayer(Player p) {
 		if (!currentPlayers.contains(p))
@@ -81,7 +79,6 @@ public class GUIHotBar implements Listener {
 	
 	/**
 	 * Detach this player from this hotbar manager and removes the managed items from the players inventory.
-	 * @param p
 	 */
 	public void removePlayer(Player p) {
 		if (!currentPlayers.contains(p))
@@ -134,7 +131,7 @@ public class GUIHotBar implements Listener {
 		
 		ItemStack item = event.getItemDrop().getItemStack();
 		for (ItemStack managed : itemsAndSetters.keySet()) {
-			if (item != null && item.isSimilar(managed)) {
+			if (item.isSimilar(managed)) {
 				event.setCancelled(true);
 				return;
 			}
@@ -173,12 +170,10 @@ public class GUIHotBar implements Listener {
 	
 	@EventHandler
 	public void onInventoryClick(InventoryClickEvent event) {
-		if (event.getClickedInventory() == null || !(event.getClickedInventory() instanceof PlayerInventory))
+		if (event.getClickedInventory() == null || !(event.getClickedInventory() instanceof PlayerInventory inv))
 			return;
-		
+
-		PlayerInventory inv = (PlayerInventory) event.getClickedInventory();
+		if (!currentPlayers.contains((Player) inv.getHolder()))
-		
-		if (!currentPlayers.contains(inv.getHolder()))
 			return;
 		
 		ItemStack item = event.getCurrentItem();

Paper/src/main/java/fr/pandacube/lib/paper/gui/GUIInventory.java

@@ -30,11 +30,11 @@ public class GUIInventory implements Listener {
 	
 	public static final Map<Enchantment, Integer> FAKE_ENCHANT = ImmutableMap.of(Enchantment.DURABILITY, 1);
 
-	private Player player;
+	private final Player player;
-	private Inventory inv;
+	private final Inventory inv;
 	private Consumer<InventoryCloseEvent> onCloseEvent;
 	private boolean isOpened = false;
-	private Map<Integer, Consumer<InventoryClickEvent>> onClickEvents;
+	private final Map<Integer, Consumer<InventoryClickEvent>> onClickEvents;
 
 	public GUIInventory(Player p, int nbLines, Chat title, Consumer<InventoryCloseEvent> closeEventAction,
 			Plugin pl) {

Paper/src/main/java/fr/pandacube/lib/paper/reflect/NMSReflect.java

@@ -139,9 +139,8 @@ public class NMSReflect {
 	/**
 	 * @param mojName the binary name of the desired class, on the mojang mapping.
 	 * @throws NullPointerException if there is no mapping for the provided Mojang mapped class.
-	 * @throws ClassNotFoundException if there is a mapping, but the runtime class was not found.
 	 */
-	public static ClassMapping mojClass(String mojName) throws ClassNotFoundException {
+	public static ClassMapping mojClass(String mojName) {
 		return Objects.requireNonNull(CLASSES_BY_MOJ.get(mojName), "Unable to find the Mojang mapped class '" + mojName + "'");
 	}
 	
@@ -339,7 +338,6 @@ public class NMSReflect {
 		 * @param mojParametersType the list of parameters of the method.
 		 * Each parameter type must be an instance of one of the following type:
 		 * {@link Type}, {@link Class}, {@link ReflectClass} or {@link ClassMapping}.
-		 * @return
 		 * @throws IllegalArgumentException if one of the parameter has an invalid type
 		 * @throws NullPointerException if one of the parameter is null, or if there is no mapping for the provided Mojang mapped method.
 		 * @throws ClassNotFoundException if there is no runtime class to represent one of the provided parametersType.
@@ -368,7 +366,6 @@ public class NMSReflect {
 		/**
 		 * 
 		 * @param mojName the Mojang mapped name of the field.
-		 * @return
 		 * @throws NullPointerException if there is no mapping for the provided Mojang mapped field.
 		 * @throws NoSuchFieldException if there is no runtime method to represent the provided method.
 		 */
@@ -393,9 +390,7 @@ public class NMSReflect {
 	    	String classToPrint = isObfClass ? obfName : mojName;
 	    	String classSimpleName = classToPrint.substring(classToPrint.lastIndexOf('.') + 1);
 	    	String htmlTitle = classSimpleName.equals(classToPrint) ? "" : (" title='" + classToPrint + "'");
-	    	String typeHTML = "<a href='#c" + id + "'" + htmlTitle + " class='cl'>" + classSimpleName + "</a>";
+			return "<a href='#c" + id + "'" + htmlTitle + " class='cl'>" + classSimpleName + "</a>";
-			
-			return typeHTML;
 		}
 		
 		
@@ -420,7 +415,7 @@ public class NMSReflect {
 			String classToPrint = obf ? obfName : mojName;
 			int packageSep = classToPrint.lastIndexOf('.');
 	    	String classSimpleName = classToPrint.substring(packageSep + 1);
-	    	String classPackages = classToPrint.substring(0, packageSep > 0 ? packageSep : 0);
+	    	String classPackages = classToPrint.substring(0, Math.max(packageSep, 0));
 	    	String classHTML = (packageSep >= 0 ? (classPackages + ".") : "") + "<b class='cl'>" + classSimpleName + "</b>";
 			
 			Type superClass = superClass(obf);
@@ -487,7 +482,7 @@ public class NMSReflect {
     
     
     
-    private static record MethodId(String name, List<Type> parametersType) implements Comparable<MethodId> {
+    private record MethodId(String name, List<Type> parametersType) implements Comparable<MethodId> {
     	@Override
     	public int compareTo(MethodId o) {
     		int cmp = name.compareTo(o.name);
@@ -497,14 +492,13 @@ public class NMSReflect {
     	}
     	
 		private String toHTML(boolean isObfClass, boolean isStatic, boolean isFinal) {
-				String paramsHTML = parametersType.stream().map(p -> p.toHTML(isObfClass)).collect(Collectors.joining(", "));
+			String paramsHTML = parametersType.stream().map(p -> p.toHTML(isObfClass)).collect(Collectors.joining(", "));
-				String cl = "mtd";
+			String cl = "mtd";
-				if (isStatic)
+			if (isStatic)
-					cl += " st";
+				cl += " st";
-				if (isFinal)
+			if (isFinal)
-					cl += " fn";
+				cl += " fn";
-				String identifierHTML = "<span class='" + cl + "'>" + name + "</span>(" + paramsHTML + ")";
+			return "<span class='" + cl + "'>" + name + "</span>(" + paramsHTML + ")";
-			return identifierHTML;
 		}
 		
 		public String toString() {
@@ -516,7 +510,7 @@ public class NMSReflect {
 
 
     
-    private static record MemberDesc<I extends Comparable<I>>(I identifier, Type returnType) {
+    private record MemberDesc<I extends Comparable<I>>(I identifier, Type returnType) {
 		private String toHTML(boolean isObfClass, boolean isStatic, boolean isFinal) {
 			String identifierHTML = "";
 			if (identifier instanceof MethodId mId)
@@ -541,7 +535,7 @@ public class NMSReflect {
 				
 				List<Type> paramsType = new ArrayList<>();
 				
-				while ((r = (char) descReader.read()) != ')') {
+				while (((char) descReader.read()) != ')') {
 					descReader.skip(-1);
 					paramsType.add(Type.parse(descReader));
 				}
@@ -565,8 +559,8 @@ public class NMSReflect {
     
     
     private static abstract class MemberMapping<I extends Comparable<I>, R extends ReflectMember<?, ?, ?, ?>> {
-    	private String htmlTypeChar;
+    	private final String htmlTypeChar;
-    	/* package */ MemberDesc<I> obfDesc, mojDesc;
+    	/* package */ final MemberDesc<I> obfDesc, mojDesc;
     	/* package */ ClassMapping declaringClass;
     	private MemberMapping(String htmlType, MemberDesc<I> obfDesc, MemberDesc<I> mojDesc) {
     		htmlTypeChar = htmlType;

Paper/src/main/java/fr/pandacube/lib/paper/reflect/Type.java

@@ -141,14 +141,11 @@ public class Type implements Comparable<Type> {
 	
 	/* package */ static Type parse(StringReader desc) {
 		try {
-			StringBuilder sbRaw = new StringBuilder();
 			int arrayDepth = 0;
 			char c;
 			while ((c = (char) desc.read()) == '[') {
-				sbRaw.append(c);
 				arrayDepth++;
 			}
-			sbRaw.append(c);
 			String type = switch(c) {
 			case 'Z' -> "boolean";
 			case 'B' -> "byte";
@@ -162,10 +159,8 @@ public class Type implements Comparable<Type> {
 				StringBuilder sbClass = new StringBuilder();
 				char r;
 				while ((r = (char) desc.read()) != ';') {
-					sbRaw.append(c);
     				sbClass.append(r);
 				}
-				sbRaw.append(c);
 				yield NMSReflect.binaryClassName(sbClass.toString());
 			}
 			default -> "void";

Paper/src/main/java/fr/pandacube/lib/paper/reflect/wrapper/ReflectListWrapper.java

@@ -1,18 +1,13 @@
 package fr.pandacube.lib.paper.reflect.wrapper;
 
-import java.util.AbstractList;
 import java.util.ArrayList;
-import java.util.Iterator;
 import java.util.List;
-import java.util.ListIterator;
-import java.util.Objects;
 import java.util.function.Supplier;
 
-import static fr.pandacube.lib.paper.reflect.wrapper.ReflectWrapper.unwrap;
+import fr.pandacube.lib.core.util.MappedListView;
 
-public class ReflectListWrapper<W extends ReflectWrapperI> extends AbstractList<W> implements ReflectWrapperTypedI<List<Object>> {
+public class ReflectListWrapper<W extends ReflectWrapperI> extends MappedListView<Object, W> implements ReflectWrapperTypedI<List<Object>> {
 
-    private final List<Object> wrappedList;
     private final Class<W> expectedWrapperClass;
 
     /* package */ ReflectListWrapper(Class<W> expectedWrapperClass) {
@@ -25,159 +20,23 @@ public class ReflectListWrapper<W extends ReflectWrapperI> extends AbstractList<
         this((List<Object>) (listCreator == null ? new ArrayList<>() : listCreator.get()), expectedWrapperClass);
     }
     /* package */ ReflectListWrapper(List<Object> wrappedList, Class<W> expectedWrapperClass) {
-        this.wrappedList = Objects.requireNonNull(wrappedList);
+        super(wrappedList, el -> ReflectWrapper.wrap(el, expectedWrapperClass), ReflectWrapper::unwrap);
         this.expectedWrapperClass = expectedWrapperClass;
     }
 
     @SuppressWarnings("unchecked")
     @Override
     public Class<List<Object>> __getRuntimeClass() {
-        return (Class<List<Object>>) wrappedList.getClass();
+        return (Class<List<Object>>) backend.getClass();
     }
 
     @Override
     public List<Object> __getRuntimeInstance() {
-        return wrappedList;
+        return backend;
-    }
-
-    private W wrap(Object el) {
-        return ReflectWrapper.wrap(el, expectedWrapperClass);
-    }
-
-    @Override
-    public W get(int index) {
-        return wrap(wrappedList.get(index));
-    }
-
-    @Override
-    public int size() {
-        return wrappedList.size();
-    }
-
-    @Override
-    public boolean add(W w) {
-        return wrappedList.add(unwrap(w));
-    }
-
-    @Override
-    public W set(int index, W element) {
-        return wrap(wrappedList.set(index, unwrap(element)));
-    }
-
-    @Override
-    public void add(int index, W element) {
-        wrappedList.add(index, unwrap(element));
-    }
-
-    @Override
-    public W remove(int index) {
-        return wrap(wrappedList.remove(index));
-    }
-
-    @Override
-    public int indexOf(Object o) {
-        return wrappedList.indexOf(o instanceof ReflectWrapperI w ? w.__getRuntimeInstance() : o);
-    }
-
-    @Override
-    public int lastIndexOf(Object o) {
-        return wrappedList.lastIndexOf(o instanceof ReflectWrapperI w ? w.__getRuntimeInstance() : o);
-    }
-
-    @Override
-    public void clear() {
-        wrappedList.clear();
-    }
-
-    @Override
-    public Iterator<W> iterator() {
-        return new Iterator<W>() {
-            final Iterator<Object> wrappedIt = wrappedList.iterator();
-            @Override
-            public boolean hasNext() {
-                return wrappedIt.hasNext();
-            }
-
-            @Override
-            public W next() {
-                return wrap(wrappedIt.next());
-            }
-
-            @Override
-            public void remove() {
-                wrappedIt.remove();
-            }
-        };
-    }
-
-    @Override
-    public ListIterator<W> listIterator() {
-        return listIterator(0);
-    }
-
-    @Override
-    public ListIterator<W> listIterator(int index) {
-        return new ListIterator<W>() {
-            final ListIterator<Object> wrappedIt = wrappedList.listIterator(index);
-            @Override
-            public boolean hasNext() {
-                return wrappedIt.hasNext();
-            }
-
-            @Override
-            public W next() {
-                return wrap(wrappedIt.next());
-            }
-
-            @Override
-            public boolean hasPrevious() {
-                return wrappedIt.hasPrevious();
-            }
-
-            @Override
-            public W previous() {
-                return wrap(wrappedIt.previous());
-            }
-
-            @Override
-            public int nextIndex() {
-                return wrappedIt.nextIndex();
-            }
-
-            @Override
-            public int previousIndex() {
-                return wrappedIt.previousIndex();
-            }
-
-            @Override
-            public void remove() {
-                wrappedIt.remove();
-            }
-
-            @Override
-            public void set(W w) {
-                wrappedIt.set(unwrap(w));
-            }
-
-            @Override
-            public void add(W w) {
-                wrappedIt.add(unwrap(w));
-            }
-        };
     }
 
     @Override
     public List<W> subList(int fromIndex, int toIndex) {
-        return new ReflectListWrapper<>(wrappedList.subList(fromIndex, toIndex), expectedWrapperClass);
+        return new ReflectListWrapper<>(backend.subList(fromIndex, toIndex), expectedWrapperClass);
-    }
-
-    @Override
-    public boolean equals(Object o) {
-        return wrappedList.equals(o);
-    }
-
-    @Override
-    public int hashCode() {
-        return wrappedList.hashCode();
     }
 }

Paper/src/main/java/fr/pandacube/lib/paper/reflect/wrapper/ReflectWrapper.java

@@ -25,6 +25,9 @@ public abstract class ReflectWrapper implements ReflectWrapperI {
 	public static <W extends ReflectWrapperI> W wrap(Object runtimeObj) {
 		return wrap(runtimeObj, null);
 	}
+	public static <T, W extends ReflectWrapperTypedI<T>> W wrapTyped(T runtimeObj, Class<W> expectedWrapperClass) {
+		return wrap(runtimeObj, expectedWrapperClass);
+	}
 	public static <W extends ReflectWrapperI> W wrap(Object runtimeObj, Class<W> expectedWrapperClass) {
 		if (runtimeObj == null)
 			return null;

Paper/src/main/java/fr/pandacube/lib/paper/reflect/wrapper/WrapperRegistry.java

@@ -214,23 +214,10 @@ public class WrapperRegistry {
     }
 
 
-
+    private record RegistryEntry(Class<?> runtimeClass,
-
+                                 Class<? extends ReflectWrapperI> wrapperClass,
-
+                                 Class<? extends ReflectWrapperI> concreteWrapperClass,
-
+                                 ReflectConstructor<? extends ReflectWrapperI> objectWrapperConstructor) {
-
-    private static class RegistryEntry {
-        Class<?> runtimeClass;
-        Class<? extends ReflectWrapperI> wrapperClass;
-        Class<? extends ReflectWrapperI> concreteWrapperClass;
-        ReflectConstructor<? extends ReflectWrapperI> objectWrapperConstructor;
-
-        public RegistryEntry(Class<?> runtimeClass, Class<? extends ReflectWrapperI> wrapperClass, Class<? extends ReflectWrapperI> concreteWrapperClass, ReflectConstructor<? extends ReflectWrapperI> objectWrapperConstructor) {
-            this.runtimeClass = runtimeClass;
-            this.wrapperClass = wrapperClass;
-            this.concreteWrapperClass = concreteWrapperClass;
-            this.objectWrapperConstructor = objectWrapperConstructor;
-        }
     }
 
 }

Paper/src/main/java/fr/pandacube/lib/paper/reflect/wrapper/brigadier/CommandNode.java

@@ -1,7 +1,6 @@
 package fr.pandacube.lib.paper.reflect.wrapper.brigadier;
 
 import fr.pandacube.lib.core.util.Reflect;
-import fr.pandacube.lib.paper.reflect.wrapper.ReflectWrapper;
 import fr.pandacube.lib.paper.reflect.wrapper.ReflectWrapperTyped;
 
 import static fr.pandacube.lib.core.util.ThrowableUtil.wrapEx;

Paper/src/main/java/fr/pandacube/lib/paper/reflect/wrapper/minecraft/WorldVersion.java

@@ -10,11 +10,11 @@ import static fr.pandacube.lib.core.util.ThrowableUtil.wrapEx;
 
 @ConcreteWrapper(WorldVersion.__concrete.class)
 public interface WorldVersion extends ReflectWrapperI {
-    public static final ClassMapping MAPPING = wrapEx(() -> NMSReflect.mojClass("net.minecraft.WorldVersion"));
+    ClassMapping MAPPING = wrapEx(() -> NMSReflect.mojClass("net.minecraft.WorldVersion"));
 
 
 
-    public static class __concrete extends ReflectWrapper implements WorldVersion {
+    class __concrete extends ReflectWrapper implements WorldVersion {
         private __concrete(Object obj) {
             super(obj);
         }

Paper/src/main/java/fr/pandacube/lib/paper/reflect/wrapper/minecraft/commands/BlockPosArgument.java

@@ -12,8 +12,9 @@ public class BlockPosArgument extends ReflectWrapperTyped<ArgumentType<?>> {
     public static final NMSReflect.ClassMapping MAPPING = wrapEx(() -> NMSReflect.mojClass("net.minecraft.commands.arguments.coordinates.BlockPosArgument"));
     private static final Reflect.ReflectMethod<?> blockPos = wrapEx(() -> MAPPING.mojMethod("blockPos"));
 
-    public static ArgumentType<?> blockPos() {
+    @SuppressWarnings("unchecked")
-        return (ArgumentType<?>) wrapReflectEx(() -> blockPos.invokeStatic());
+    public static ArgumentType<Object> blockPos() {
+        return (ArgumentType<Object>) wrapReflectEx(() -> blockPos.invokeStatic());
     }
 
     protected BlockPosArgument(Object obj) {

Paper/src/main/java/fr/pandacube/lib/paper/reflect/wrapper/minecraft/commands/ComponentArgument.java

@@ -12,8 +12,9 @@ public class ComponentArgument extends ReflectWrapperTyped<ArgumentType<?>> {
     public static final NMSReflect.ClassMapping MAPPING = wrapEx(() -> NMSReflect.mojClass("net.minecraft.commands.arguments.ComponentArgument"));
     private static final Reflect.ReflectMethod<?> textComponent = wrapEx(() -> MAPPING.mojMethod("textComponent"));
 
-    public static ArgumentType<?> textComponent() {
+    @SuppressWarnings("unchecked")
-        return (ArgumentType<?>) wrapReflectEx(() -> textComponent.invokeStatic());
+    public static ArgumentType<Object> textComponent() {
+        return (ArgumentType<Object>) wrapReflectEx(() -> textComponent.invokeStatic());
     }
 
     protected ComponentArgument(Object obj) {

Paper/src/main/java/fr/pandacube/lib/paper/reflect/wrapper/minecraft/commands/Coordinates.java

@@ -15,19 +15,19 @@ import static fr.pandacube.lib.paper.reflect.wrapper.ReflectWrapper.wrap;
 
 @ConcreteWrapper(Coordinates.__concrete.class)
 public interface Coordinates extends ReflectWrapperI {
-    public static final NMSReflect.ClassMapping MAPPING = wrapEx(() -> NMSReflect.mojClass("net.minecraft.commands.arguments.coordinates.Coordinates"));
+    NMSReflect.ClassMapping MAPPING = wrapEx(() -> NMSReflect.mojClass("net.minecraft.commands.arguments.coordinates.Coordinates"));
-    public static final Reflect.ReflectMethod<?> getPosition = wrapEx(() -> MAPPING.mojMethod("getPosition", CommandSourceStack.MAPPING));
+    Reflect.ReflectMethod<?> getPosition = wrapEx(() -> MAPPING.mojMethod("getPosition", CommandSourceStack.MAPPING));
-    public static final Reflect.ReflectMethod<?> getBlockPos = wrapEx(() -> MAPPING.mojMethod("getBlockPos", CommandSourceStack.MAPPING));
+    Reflect.ReflectMethod<?> getBlockPos = wrapEx(() -> MAPPING.mojMethod("getBlockPos", CommandSourceStack.MAPPING));
 
-    public default Vec3 getPosition(BukkitBrigadierCommandSource source) {
+    default Vec3 getPosition(BukkitBrigadierCommandSource source) {
         return wrap(wrapReflectEx(() -> getPosition.invoke(__getRuntimeInstance(), source)), Vec3.class);
     }
 
-    public default BlockPos getBlockPos(BukkitBrigadierCommandSource source) {
+    default BlockPos getBlockPos(BukkitBrigadierCommandSource source) {
         return wrap(wrapReflectEx(() -> getBlockPos.invoke(__getRuntimeInstance(), source)), BlockPos.class);
     }
 
-    static class __concrete extends ReflectWrapper implements Coordinates {
+    class __concrete extends ReflectWrapper implements Coordinates {
         protected __concrete(Object obj) {
             super(obj);
         }

Paper/src/main/java/fr/pandacube/lib/paper/reflect/wrapper/minecraft/commands/EntityArgument.java

@@ -15,20 +15,24 @@ public class EntityArgument extends ReflectWrapperTyped<ArgumentType<?>> {
     private static final Reflect.ReflectMethod<?> player = wrapEx(() -> MAPPING.mojMethod("player"));
     private static final Reflect.ReflectMethod<?> players = wrapEx(() -> MAPPING.mojMethod("players"));
 
-    public static ArgumentType<?> entity() {
+    @SuppressWarnings("unchecked")
-        return (ArgumentType<?>) wrapReflectEx(() -> entity.invokeStatic());
+    public static ArgumentType<Object> entity() {
+        return (ArgumentType<Object>) wrapReflectEx(() -> entity.invokeStatic());
     }
 
-    public static ArgumentType<?> entities() {
+    @SuppressWarnings("unchecked")
-        return (ArgumentType<?>) wrapReflectEx(() -> entities.invokeStatic());
+    public static ArgumentType<Object> entities() {
+        return (ArgumentType<Object>) wrapReflectEx(() -> entities.invokeStatic());
     }
 
-    public static ArgumentType<?> player() {
+    @SuppressWarnings("unchecked")
-        return (ArgumentType<?>) wrapReflectEx(() -> player.invokeStatic());
+    public static ArgumentType<Object> player() {
+        return (ArgumentType<Object>) wrapReflectEx(() -> player.invokeStatic());
     }
 
-    public static ArgumentType<?> players() {
+    @SuppressWarnings("unchecked")
-        return (ArgumentType<?>) wrapReflectEx(() -> players.invokeStatic());
+    public static ArgumentType<Object> players() {
+        return (ArgumentType<Object>) wrapReflectEx(() -> players.invokeStatic());
     }
 
 

Paper/src/main/java/fr/pandacube/lib/paper/reflect/wrapper/minecraft/commands/GameProfileArgument.java

@@ -12,8 +12,9 @@ public class GameProfileArgument extends ReflectWrapperTyped<ArgumentType<?>> {
     public static final NMSReflect.ClassMapping MAPPING = wrapEx(() -> NMSReflect.mojClass("net.minecraft.commands.arguments.GameProfileArgument"));
     private static final Reflect.ReflectMethod<?> gameProfile = wrapEx(() -> MAPPING.mojMethod("gameProfile"));
 
-    public static ArgumentType<?> gameProfile() {
+    @SuppressWarnings("unchecked")
-        return (ArgumentType<?>) wrapReflectEx(() -> gameProfile.invokeStatic());
+    public static ArgumentType<Object> gameProfile() {
+        return (ArgumentType<Object>) wrapReflectEx(() -> gameProfile.invokeStatic());
     }
 
     protected GameProfileArgument(Object obj) {

Paper/src/main/java/fr/pandacube/lib/paper/reflect/wrapper/minecraft/commands/ResourceLocationArgument.java

@@ -12,8 +12,9 @@ public class ResourceLocationArgument extends ReflectWrapperTyped<ArgumentType<?
     public static final NMSReflect.ClassMapping MAPPING = wrapEx(() -> NMSReflect.mojClass("net.minecraft.commands.arguments.ResourceLocationArgument"));
     private static final Reflect.ReflectMethod<?> id = wrapEx(() -> MAPPING.mojMethod("id"));
 
-    public static ArgumentType<?> id() {
+    @SuppressWarnings("unchecked")
-        return (ArgumentType<?>) wrapReflectEx(() -> id.invokeStatic());
+    public static ArgumentType<Object> id() {
+        return (ArgumentType<Object>) wrapReflectEx(() -> id.invokeStatic());
     }
 
     protected ResourceLocationArgument(Object obj) {

Paper/src/main/java/fr/pandacube/lib/paper/reflect/wrapper/minecraft/commands/Vec3Argument.java

@@ -12,8 +12,9 @@ public class Vec3Argument extends ReflectWrapperTyped<ArgumentType<?>> {
     public static final NMSReflect.ClassMapping MAPPING = wrapEx(() -> NMSReflect.mojClass("net.minecraft.commands.arguments.coordinates.Vec3Argument"));
     private static final Reflect.ReflectMethod<?> vec3 = wrapEx(() -> MAPPING.mojMethod("vec3", boolean.class));
 
-    public static ArgumentType<?> vec3(boolean centerIntegers) {
+    @SuppressWarnings("unchecked")
-        return (ArgumentType<?>) wrapReflectEx(() -> vec3.invokeStatic(centerIntegers));
+    public static ArgumentType<Object> vec3(boolean centerIntegers) {
+        return (ArgumentType<Object>) wrapReflectEx(() -> vec3.invokeStatic(centerIntegers));
     }
 
 

Paper/src/main/java/fr/pandacube/lib/paper/reflect/wrapper/minecraft/core/BlockPos.java

@@ -1,8 +1,6 @@
 package fr.pandacube.lib.paper.reflect.wrapper.minecraft.core;
 
-import fr.pandacube.lib.core.util.Reflect;
 import fr.pandacube.lib.paper.reflect.NMSReflect;
-import fr.pandacube.lib.paper.reflect.wrapper.ReflectWrapper;
 
 import static fr.pandacube.lib.core.util.ThrowableUtil.wrapEx;
 

Paper/src/main/java/fr/pandacube/lib/paper/reflect/wrapper/minecraft/nbt/Tag.java

@@ -12,17 +12,17 @@ import fr.pandacube.lib.paper.reflect.wrapper.ReflectWrapperI;
 
 @ConcreteWrapper(Tag.__concrete.class)
 public interface Tag extends ReflectWrapperI {
-	public static final ClassMapping MAPPING = wrapEx(() -> NMSReflect.mojClass("net.minecraft.nbt.Tag"));
+	ClassMapping MAPPING = wrapEx(() -> NMSReflect.mojClass("net.minecraft.nbt.Tag"));
-	public static final ReflectMethod<?> getAsString = wrapEx(() -> MAPPING.mojMethod("getAsString"));
+	ReflectMethod<?> getAsString = wrapEx(() -> MAPPING.mojMethod("getAsString"));
 
 	
-	public default String getAsString() {
+	default String getAsString() {
 		return wrapReflectEx(() -> (String) getAsString.invoke(__getRuntimeInstance()));
 	}
 	
 
 	
-	public static class __concrete extends ReflectWrapper implements Tag {
+	class __concrete extends ReflectWrapper implements Tag {
 		private __concrete(Object obj) {
 			super(obj);
 		}

Paper/src/main/java/fr/pandacube/lib/paper/reflect/wrapper/minecraft/network/chat/Component.java

@@ -9,10 +9,10 @@ import static fr.pandacube.lib.core.util.ThrowableUtil.wrapEx;
 
 @ConcreteWrapper(Component.__concrete.class)
 public interface Component extends ReflectWrapperI {
-    public static final NMSReflect.ClassMapping MAPPING = wrapEx(() -> NMSReflect.mojClass("net.minecraft.network.chat.Component"));
+    NMSReflect.ClassMapping MAPPING = wrapEx(() -> NMSReflect.mojClass("net.minecraft.network.chat.Component"));
 
 
-    public class __concrete extends ReflectWrapper implements Component {
+    class __concrete extends ReflectWrapper implements Component {
         protected __concrete(Object obj) {
             super(obj);
         }