Cleaned up imports and unused code.

src/main/java/ca/recrown/islandsurvivalcraft/interaction/commands/runnables/HighlightIslandCommand.java

@@ -1,11 +1,9 @@
 package ca.recrown.islandsurvivalcraft.interaction.commands.runnables;
 
-import java.util.ArrayList;
 import java.util.HashSet;
 import java.util.Iterator;
 import java.util.LinkedList;
 import java.util.Set;
-import java.util.concurrent.CompletableFuture;
 
 import org.bukkit.Bukkit;
 import org.bukkit.Color;
@@ -17,7 +15,6 @@ import org.bukkit.entity.Player;
 
 import ca.recrown.islandsurvivalcraft.IslandSurvivalCraft;
 import ca.recrown.islandsurvivalcraft.utilities.datatypes.Point2;
-import ca.recrown.islandsurvivalcraft.utilities.pathfinding.DepthFirstSearch;
 import ca.recrown.islandsurvivalcraft.world.WorldInfo;
 import ca.recrown.islandsurvivalcraft.world.Information.IslandInformation;
 
@@ -27,7 +24,7 @@ public class HighlightIslandCommand implements CommandRunnable {
     private final double OFFSET_X = 0.0d, OFFSET_Y = 6.0d, OFFSET_Z = 0.0d;
     private final double EXTRA = 0d;
     HashSet<Player> playersHighlighting = new HashSet<>();
-    LinkedList<PlayerIslandHighlighter> waitingList = new LinkedList<>();
+    LinkedList<Player> waitingList = new LinkedList<>();
 
     @Override
     public String getDescription() {
@@ -46,7 +43,7 @@ public class HighlightIslandCommand implements CommandRunnable {
         }
         if (args[0].toLowerCase().equals("start")) {
             if (playersHighlighting.add(player)) {
-                waitingList.add(new PlayerIslandHighlighter(player));
+                waitingList.add(player);
                 sender.sendMessage("You are now highlighting islands.");
             } else {
                 sender.sendMessage("You are already highlighting islands.");
@@ -68,9 +65,7 @@ public class HighlightIslandCommand implements CommandRunnable {
         Bukkit.getScheduler().scheduleSyncRepeatingTask(islandsurvivalcraft, new Runnable() {
             @Override
             public void run() {
-                PlayerIslandHighlighter highlighter = waitingList.poll();
-                if (highlighter == null) return;
-                Player player = highlighter.player;
+                Player player = waitingList.poll();
                 if (player == null || !player.isOnline() || !playersHighlighting.contains(player)) {
                     playersHighlighting.remove(player);
                     return;
@@ -90,7 +85,7 @@ public class HighlightIslandCommand implements CommandRunnable {
                         islandborderIterable.next();
                     }
                 }
-                waitingList.add(highlighter);
+                waitingList.add(player);
             }
         }, 0, 10);
 
@@ -104,23 +99,4 @@ public class HighlightIslandCommand implements CommandRunnable {
     public String getDetailedDescription() {
         return "A helpful debugging command to analyze what the plugin considers an island by displaying particle effects around the player that is a part of the island. The <start | stop> argument is required to dicate whether or not to start the highlighting or stop it.";
     }
-    
-    private class PlayerIslandHighlighter {
-        private final int MAX_SEARCH = 0;
-        private IslandInformation lastIsland;
-        private final Player player;
-        private DepthFirstSearch dfs;
-
-        public PlayerIslandHighlighter(Player player) {
-            this.player = player;
-        }
-
-        public boolean hasUpdated(IslandInformation islandInformation) {
-            if (lastIsland == null || !(lastIsland.hashCode() == islandInformation.hashCode() && lastIsland.equals(islandInformation))) {
-                lastIsland = islandInformation;
-                return true;
-            }
-            return false;
-        }
-    }
 }

src/main/java/ca/recrown/islandsurvivalcraft/world/WorldInfo.java

@@ -36,6 +36,7 @@ public class WorldInfo {
     public void initialize(World world) {
         if (initialized)
             throw new IllegalStateException("This world information object has already been initialized.");
+        if (world == null) throw new NullPointerException("The world argument cannot be null.");
         this.initialized = true;
         this.seed = world.getSeed();
         this.random = new Random(seed);

src/main/java/ca/recrown/islandsurvivalcraft/world/WorldInfoManager.java

@@ -1,12 +1,9 @@
 package ca.recrown.islandsurvivalcraft.world;
 
-import java.security.InvalidParameterException;
-import java.util.UUID;
 import java.util.concurrent.ConcurrentHashMap;
 
 import org.apache.commons.lang.NullArgumentException;
 import org.bukkit.Chunk;
-import org.bukkit.World;
 import org.bukkit.event.EventHandler;
 import org.bukkit.event.EventPriority;
 import org.bukkit.event.Listener;