Add copyright header

src/client/java/minicraft/core/Action.java

@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: 2011-2024 Minicraft+ contributors
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
 package minicraft.core;
 
 @FunctionalInterface

src/client/java/minicraft/core/Condition.java

@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: 2011-2024 Minicraft+ contributors
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
 package minicraft.core;
 
 @FunctionalInterface

src/client/java/minicraft/core/CrashHandler.java

@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: 2011-2024 Minicraft+ contributors
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
 package minicraft.core;
 
 import kong.unirest.Empty;

src/client/java/minicraft/core/Game.java

@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: 2011-2024 Minicraft+ contributors
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
 package minicraft.core;
 
 import minicraft.core.io.InputHandler;

src/client/java/minicraft/core/Initializer.java

@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: 2011-2024 Minicraft+ contributors
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
 package minicraft.core;
 
 import minicraft.core.io.FileHandler;

src/client/java/minicraft/core/MonoCondition.java

@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: 2011-2024 Minicraft+ contributors
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
 package minicraft.core;
 
 @FunctionalInterface

src/client/java/minicraft/core/Renderer.java

@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: 2011-2024 Minicraft+ contributors
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
 package minicraft.core;
 
 import minicraft.core.CrashHandler.ErrorInfo;

src/client/java/minicraft/core/Updater.java

@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: 2011-2024 Minicraft+ contributors
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
 package minicraft.core;
 
 import minicraft.core.io.Localization;
@@ -227,7 +232,7 @@ public static void tick() {
 					} else if (isMode("minicraft.settings.mode.creative") && input.getMappedKey("SHIFT-W").isClicked()) {
 						Game.setDisplay(new LevelTransitionDisplay(1));
 					}
-					
+
 					if (input.getMappedKey("F3-L").isClicked()) {
 						// Print all players on all levels, and their coordinates.
 						Logging.WORLD.info("Printing players on all levels.");

src/client/java/minicraft/core/VersionInfo.java

@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: 2011-2024 Minicraft+ contributors
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
 package minicraft.core;
 
 import minicraft.saveload.Version;

src/client/java/minicraft/core/World.java

@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: 2011-2024 Minicraft+ contributors
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
 package minicraft.core;
 
 import minicraft.core.io.Settings;

src/client/java/minicraft/core/io/ClipboardHandler.java

@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: 2011-2024 Minicraft+ contributors
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
 package minicraft.core.io;
 
 import minicraft.core.CrashHandler;

src/client/java/minicraft/core/io/FileHandler.java

@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: 2011-2024 Minicraft+ contributors
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
 package minicraft.core.io;
 
 import minicraft.core.CrashHandler;

src/client/java/minicraft/core/io/InputHandler.java

@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: 2011-2024 Minicraft+ contributors
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
 package minicraft.core.io;
 
 import com.badlogic.gdx.utils.SharedLibraryLoadRuntimeException;

src/client/java/minicraft/core/io/Localization.java

@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: 2011-2024 Minicraft+ contributors
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
 package minicraft.core.io;
 
 import minicraft.util.Logging;

src/client/java/minicraft/core/io/Settings.java

@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: 2011-2024 Minicraft+ contributors
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
 package minicraft.core.io;
 
 import minicraft.screen.entry.ArrayEntry;

src/client/java/minicraft/core/io/Sound.java

@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: 2011-2024 Minicraft+ contributors
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
 package minicraft.core.io;
 
 import minicraft.core.CrashHandler;

src/client/java/minicraft/entity/Arrow.java

@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: 2011-2024 Minicraft+ contributors
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
 package minicraft.entity;
 
 import minicraft.entity.mob.Mob;

src/client/java/minicraft/entity/ClientTickable.java

@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: 2011-2024 Minicraft+ contributors
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
 package minicraft.entity;
 
 public interface ClientTickable extends Tickable {

src/client/java/minicraft/entity/Direction.java

@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: 2011-2024 Minicraft+ contributors
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
 package minicraft.entity;
 
 public enum Direction {

src/client/java/minicraft/entity/Entity.java

@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: 2011-2024 Minicraft+ contributors
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
 package minicraft.entity;
 
 import minicraft.core.Action;

src/client/java/minicraft/entity/ExplosionTileTicker.java

@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: 2011-2024 Minicraft+ contributors
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
 package minicraft.entity;
 
 import minicraft.gfx.Screen;

src/client/java/minicraft/entity/FireSpark.java

@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: 2011-2024 Minicraft+ contributors
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
 package minicraft.entity;
 
 import minicraft.core.Game;

src/client/java/minicraft/entity/ItemEntity.java

@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: 2011-2024 Minicraft+ contributors
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
 package minicraft.entity;
 
 import minicraft.entity.mob.Player;

src/client/java/minicraft/entity/ItemHolder.java

@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: 2011-2024 Minicraft+ contributors
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
 package minicraft.entity;
 
 import minicraft.item.Inventory;

src/client/java/minicraft/entity/Spark.java

@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: 2011-2024 Minicraft+ contributors
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
 package minicraft.entity;
 
 import minicraft.core.Game;

src/client/java/minicraft/entity/Tickable.java

@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: 2011-2024 Minicraft+ contributors
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
 package minicraft.entity;
 
 public interface Tickable {

src/client/java/minicraft/entity/furniture/Bed.java

@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: 2011-2024 Minicraft+ contributors
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
 package minicraft.entity.furniture;
 
 import minicraft.core.Game;

src/client/java/minicraft/entity/furniture/Chest.java

@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: 2011-2024 Minicraft+ contributors
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
 package minicraft.entity.furniture;
 
 import minicraft.core.CrashHandler;

src/client/java/minicraft/entity/furniture/Composter.java

@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: 2011-2024 Minicraft+ contributors
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
 package minicraft.entity.furniture;
 
 import minicraft.entity.Direction;

src/client/java/minicraft/entity/furniture/Crafter.java

@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: 2011-2024 Minicraft+ contributors
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
 package minicraft.entity.furniture;
 
 import minicraft.core.Game;

src/client/java/minicraft/entity/furniture/DeathChest.java

@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: 2011-2024 Minicraft+ contributors
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
 package minicraft.entity.furniture;
 
 import minicraft.core.Game;

src/client/java/minicraft/entity/furniture/DungeonChest.java

@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: 2011-2024 Minicraft+ contributors
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
 package minicraft.entity.furniture;
 
 import minicraft.core.io.Localization;

src/client/java/minicraft/entity/furniture/Furniture.java

@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: 2011-2024 Minicraft+ contributors
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
 package minicraft.entity.furniture;
 
 import minicraft.core.io.Sound;

src/client/java/minicraft/entity/furniture/KnightStatue.java

@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: 2011-2024 Minicraft+ contributors
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
 package minicraft.entity.furniture;
 
 import minicraft.core.Game;

src/client/java/minicraft/entity/furniture/Lantern.java

@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: 2011-2024 Minicraft+ contributors
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
 package minicraft.entity.furniture;
 
 import minicraft.gfx.SpriteLinker.LinkedSprite;

src/client/java/minicraft/entity/furniture/Spawner.java

@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: 2011-2024 Minicraft+ contributors
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
 package minicraft.entity.furniture;
 
 import minicraft.core.Game;

src/client/java/minicraft/entity/furniture/Tnt.java

@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: 2011-2024 Minicraft+ contributors
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
 package minicraft.entity.furniture;
 
 import minicraft.core.io.Sound;

src/client/java/minicraft/entity/mob/AirWizard.java

@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: 2011-2024 Minicraft+ contributors
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
 package minicraft.entity.mob;
 
 import minicraft.core.Game;

src/client/java/minicraft/entity/mob/Cow.java

@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: 2011-2024 Minicraft+ contributors
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
 package minicraft.entity.mob;
 
 import minicraft.core.io.Settings;

src/client/java/minicraft/entity/mob/Creeper.java

@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: 2011-2024 Minicraft+ contributors
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
 package minicraft.entity.mob;
 
 import minicraft.core.Game;

src/client/java/minicraft/entity/mob/EnemyMob.java

@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: 2011-2024 Minicraft+ contributors
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
 package minicraft.entity.mob;
 
 import minicraft.core.Game;

src/client/java/minicraft/entity/mob/Knight.java

@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: 2011-2024 Minicraft+ contributors
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
 package minicraft.entity.mob;
 
 import minicraft.core.io.Settings;

src/client/java/minicraft/entity/mob/Mob.java

@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: 2011-2024 Minicraft+ contributors
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
 package minicraft.entity.mob;
 
 import minicraft.core.Game;