Embrace Java 7's diamond operator project-wide.

src/main/java/com/garbagemule/MobArena/ArenaClass.java

@@ -36,10 +36,10 @@ public class ArenaClass
         this.configName    = name;
         this.lowercaseName = name.toLowerCase().replace(" ", "");
         
-        this.items = new ArrayList<ItemStack>();
+        this.items = new ArrayList<>();
-        this.armor = new ArrayList<ItemStack>(4);
+        this.armor = new ArrayList<>(4);
-        this.perms = new HashMap<String,Boolean>();
+        this.perms = new HashMap<>();
-        this.lobbyperms = new HashMap<String,Boolean>();
+        this.lobbyperms = new HashMap<>();
 
         this.unbreakableWeapons = unbreakableWeapons;
         this.unbreakableArmor = unbreakableArmor;
@@ -137,7 +137,7 @@ public class ArenaClass
      * @param stacks a list of items
      */
     public void setItems(List<ItemStack> stacks) {
-        this.items = new ArrayList<ItemStack>(stacks.size());
+        this.items = new ArrayList<>(stacks.size());
         for (ItemStack stack : stacks) {
             addItem(stack);
         }

src/main/java/com/garbagemule/MobArena/ArenaImpl.java

@@ -92,7 +92,7 @@ public class ArenaImpl implements Arena
     private RewardManager     rewardManager;
     private ClassLimitManager limitManager;
     private Map<Player,ArenaPlayer> arenaPlayerMap;
-    private Map<Player,PlayerData> playerData = new HashMap<Player,PlayerData>();
+    private Map<Player,PlayerData> playerData = new HashMap<>();
     
     private Set<Player> arenaPlayers, lobbyPlayers, readyPlayers, specPlayers, deadPlayers;
     private Set<Player> randoms;
@@ -155,17 +155,17 @@ public class ArenaImpl implements Arena
         this.leaderboard = new Leaderboard(plugin, this, region.getLeaderboard());
 
         // Player stuff
-        this.arenaPlayerMap = new HashMap<Player,ArenaPlayer>();
+        this.arenaPlayerMap = new HashMap<>();
-        this.arenaPlayers   = new HashSet<Player>();
+        this.arenaPlayers   = new HashSet<>();
-        this.lobbyPlayers   = new HashSet<Player>();
+        this.lobbyPlayers   = new HashSet<>();
-        this.readyPlayers   = new HashSet<Player>();
+        this.readyPlayers   = new HashSet<>();
-        this.specPlayers    = new HashSet<Player>();
+        this.specPlayers    = new HashSet<>();
-        this.deadPlayers    = new HashSet<Player>();
+        this.deadPlayers    = new HashSet<>();
-        this.randoms        = new HashSet<Player>();
+        this.randoms        = new HashSet<>();
 
         // Classes, items and permissions
         this.classes      = plugin.getArenaMaster().getClasses();
-        this.attachments  = new HashMap<Player,PermissionAttachment>();
+        this.attachments  = new HashMap<>();
         this.limitManager = new ClassLimitManager(this, classes, makeSection(section, "class-limits"));
 
         String defaultClassName = settings.getString("default-class", null);
@@ -174,10 +174,10 @@ public class ArenaImpl implements Arena
         }
         
         // Blocks and pets
-        this.repairQueue  = new PriorityBlockingQueue<Repairable>(100, new RepairableComparator());
+        this.repairQueue  = new PriorityBlockingQueue<>(100, new RepairableComparator());
-        this.blocks       = new HashSet<Block>();
+        this.blocks       = new HashSet<>();
-        this.repairables  = new LinkedList<Repairable>();
+        this.repairables  = new LinkedList<>();
-        this.containables = new LinkedList<Repairable>();
+        this.containables = new LinkedList<>();
         
         // Monster stuff
         this.monsterManager = new MonsterManager();
@@ -607,7 +607,7 @@ public class ArenaImpl implements Arena
             return;
         
         // Set operations.
-        Set<Player> tmp = new HashSet<Player>();
+        Set<Player> tmp = new HashSet<>();
         tmp.addAll(lobbyPlayers);
         tmp.removeAll(readyPlayers);
         
@@ -1298,7 +1298,7 @@ public class ArenaImpl implements Arena
     public void assignRandomClass(Player p)
     {
         Random r = new Random();
-        List<String> classes = new LinkedList<String>(this.classes.keySet());
+        List<String> classes = new LinkedList<>(this.classes.keySet());
 
         String className = classes.remove(r.nextInt(classes.size()));
         while (!plugin.has(p, "mobarena.classes." + className))
@@ -1480,7 +1480,7 @@ public class ArenaImpl implements Arena
     @Override
     public List<Player> getAllPlayers()
     {
-        List<Player> result = new LinkedList<Player>();
+        List<Player> result = new LinkedList<>();
         result.addAll(arenaPlayers);
         result.addAll(lobbyPlayers);
         result.addAll(specPlayers);
@@ -1514,7 +1514,7 @@ public class ArenaImpl implements Arena
     @Override
     public List<Player> getNonreadyPlayers()
     {
-        List<Player> result = new LinkedList<Player>();
+        List<Player> result = new LinkedList<>();
         result.addAll(lobbyPlayers);
         result.removeAll(readyPlayers);
         return result;

src/main/java/com/garbagemule/MobArena/ArenaListener.java

@@ -153,7 +153,7 @@ public class ArenaListener
 
         this.allowMonsters = arena.getWorld().getAllowMonsters();
 
-        this.banned = new HashSet<Player>();
+        this.banned = new HashSet<>();
     }
     
     void pvpActivate() {
@@ -465,7 +465,7 @@ public class ArenaListener
 
         // If the arena isn't destructible, just clear the blocklist.
         if (!softRestore && protect) {
-            List<Block> blocks = new LinkedList<Block>(arena.getBlocks());
+            List<Block> blocks = new LinkedList<>(arena.getBlocks());
             event.blockList().retainAll(blocks);
             return;
         }

src/main/java/com/garbagemule/MobArena/ArenaMasterImpl.java

@@ -52,12 +52,12 @@ public class ArenaMasterImpl implements ArenaMaster
         this.plugin = plugin;
         this.config = plugin.getConfig();
 
-        this.arenas = new ArrayList<Arena>();
+        this.arenas = new ArrayList<>();
-        this.arenaMap = new HashMap<Player, Arena>();
+        this.arenaMap = new HashMap<>();
 
-        this.classes = new HashMap<String, ArenaClass>();
+        this.classes = new HashMap<>();
 
-        this.allowedCommands = new HashSet<String>();
+        this.allowedCommands = new HashSet<>();
         
         this.enabled = config.getBoolean("global-settings.enabled", true);
     }
@@ -125,7 +125,7 @@ public class ArenaMasterImpl implements ArenaMaster
     }
     
     public List<Arena> getEnabledArenas(List<Arena> arenas) {
-        List<Arena> result = new ArrayList<Arena>(arenas.size());
+        List<Arena> result = new ArrayList<>(arenas.size());
         for (Arena arena : arenas)
             if (arena.isEnabled()) 
                 result.add(arena);
@@ -133,7 +133,7 @@ public class ArenaMasterImpl implements ArenaMaster
     }
 
     public List<Arena> getPermittedArenas(Player p) {
-        List<Arena> result = new ArrayList<Arena>(arenas.size());
+        List<Arena> result = new ArrayList<>(arenas.size());
         for (Arena arena : arenas)
             if (plugin.has(p, "mobarena.arenas." + arena.configName()))
                 result.add(arena);
@@ -141,7 +141,7 @@ public class ArenaMasterImpl implements ArenaMaster
     }
 
     public List<Arena> getEnabledAndPermittedArenas(Player p) {
-        List<Arena> result = new ArrayList<Arena>(arenas.size());
+        List<Arena> result = new ArrayList<>(arenas.size());
         for (Arena arena : arenas)
             if (arena.isEnabled() && plugin.has(p, "mobarena.arenas." + arena.configName()))
                 result.add(arena);
@@ -156,7 +156,7 @@ public class ArenaMasterImpl implements ArenaMaster
     }
 
     public List<Arena> getArenasInWorld(World world) {
-        List<Arena> result = new ArrayList<Arena>(arenas.size());
+        List<Arena> result = new ArrayList<>(arenas.size());
         for (Arena arena : arenas)
             if (arena.getWorld().equals(world))
                 result.add(arena);
@@ -164,7 +164,7 @@ public class ArenaMasterImpl implements ArenaMaster
     }
 
     public List<Player> getAllPlayers() {
-        List<Player> result = new ArrayList<Player>(arenas.size());
+        List<Player> result = new ArrayList<>(arenas.size());
         for (Arena arena : arenas)
             result.addAll(arena.getAllPlayers());
         return result;
@@ -172,11 +172,11 @@ public class ArenaMasterImpl implements ArenaMaster
 
     public List<Player> getAllPlayersInArena(String arenaName) {
         Arena arena = getArenaWithName(arenaName);
-        return (arena != null) ? new ArrayList<Player>(arena.getPlayersInArena()) : new ArrayList<Player>();
+        return (arena != null) ? new ArrayList<>(arena.getPlayersInArena()) : new ArrayList<Player>();
     }
 
     public List<Player> getAllLivingPlayers() {
-        List<Player> result = new ArrayList<Player>();
+        List<Player> result = new ArrayList<>();
         for (Arena arena : arenas)
             result.addAll(arena.getPlayersInArena());
         return result;
@@ -184,7 +184,7 @@ public class ArenaMasterImpl implements ArenaMaster
 
     public List<Player> getLivingPlayersInArena(String arenaName) {
         Arena arena = getArenaWithName(arenaName);
-        return (arena != null) ? new ArrayList<Player>(arena.getPlayersInArena()) : new ArrayList<Player>();
+        return (arena != null) ? new ArrayList<>(arena.getPlayersInArena()) : new ArrayList<Player>();
     }
 
     public Arena getArenaWithPlayer(Player p) {
@@ -271,7 +271,7 @@ public class ArenaMasterImpl implements ArenaMaster
 
 
         // Establish the map.
-        classes = new HashMap<String, ArenaClass>();
+        classes = new HashMap<>();
         Set<String> classNames = section.getKeys(false);
 
         // Load each individual class.
@@ -331,7 +331,7 @@ public class ArenaMasterImpl implements ArenaMaster
             List<ItemStack> stacks = ItemParser.parseItems(str);
             arenaClass.setItems(stacks);
         } else {
-            List<ItemStack> stacks = new ArrayList<ItemStack>();
+            List<ItemStack> stacks = new ArrayList<>();
             for (String item : items) {
                 ItemStack stack = ItemParser.parseItem(item);
                 if (stack != null) {
@@ -536,7 +536,7 @@ public class ArenaMasterImpl implements ArenaMaster
             createArenaNode(section, "default", plugin.getServer().getWorlds().get(0), false);
         }
         
-        arenas = new ArrayList<Arena>();
+        arenas = new ArrayList<>();
         for (World w : Bukkit.getServer().getWorlds()) {
             loadArenasInWorld(w.getName());
         }

src/main/java/com/garbagemule/MobArena/ArenaPlayerStatistics.java

@@ -23,7 +23,7 @@ public class ArenaPlayerStatistics
 
     public void reset() {
         if (ints == null) {
-            ints = new HashMap<String, MutableInt>();
+            ints = new HashMap<>();
         }
 
         ints.clear();

src/main/java/com/garbagemule/MobArena/ClassLimitManager.java

@@ -20,8 +20,8 @@ public class ClassLimitManager
     public ClassLimitManager(Arena arena, Map<String,ArenaClass> classes, ConfigurationSection limits) {
         this.limits       = limits;
         this.classes      = classes;
-        this.classLimits  = new HashMap<ArenaClass,MutableInt>();
+        this.classLimits  = new HashMap<>();
-        this.classesInUse = new HashMap<ArenaClass, HashSet<String>>();
+        this.classesInUse = new HashMap<>();
 
         loadLimitMap(arena.getPlugin());
         initInUseMap();

src/main/java/com/garbagemule/MobArena/MASpawnThread.java

@@ -108,7 +108,7 @@ public class MASpawnThread implements Runnable
             plugin.getServer().getPluginManager().callEvent(complete);
 
             // Then force leave everyone
-            List<Player> players = new ArrayList<Player>(arena.getPlayersInArena());
+            List<Player> players = new ArrayList<>(arena.getPlayersInArena());
             for (Player p : players) {
                 arena.playerLeave(p);
             }
@@ -278,7 +278,7 @@ public class MASpawnThread implements Runnable
     }
 
     private void removeCheatingPlayers() {
-        List<Player> players = new ArrayList<Player>(arena.getPlayersInArena());
+        List<Player> players = new ArrayList<>(arena.getPlayersInArena());
         for (Player p : players) {
             if (region.contains(p.getLocation())) {
                 continue;

src/main/java/com/garbagemule/MobArena/MAUtils.java

@@ -53,7 +53,7 @@ public class MAUtils
     public static Map<Integer,List<ItemStack>> getArenaRewardMap(MobArena plugin, ConfigurationSection config, String arena, String type)
     {
         //String arenaPath = "arenas." + arena + ".rewards.waves.";
-        Map<Integer,List<ItemStack>> result = new HashMap<Integer,List<ItemStack>>();
+        Map<Integer,List<ItemStack>> result = new HashMap<>();
 
         String typePath = "rewards.waves." + type;
         if (!config.contains(typePath)) return result;
@@ -141,7 +141,7 @@ public class MAUtils
         
         /* Iterate through the ArrayList, and update current and result every
          * time a squared distance smaller than current is found. */
-        List<Player> players = new ArrayList<Player>(arena.getPlayersInArena());
+        List<Player> players = new ArrayList<>(arena.getPlayersInArena());
         for (Player p : players) {
             if (!arena.getWorld().equals(p.getWorld())) {
                 plugin.getLogger().info("Player '" + p.getName() + "' is not in the right world. Kicking...");
@@ -261,7 +261,7 @@ public class MAUtils
      */
     public static List<String> stringToList(String list)
     {
-        List<String> result = new LinkedList<String>();
+        List<String> result = new LinkedList<>();
         if (list == null) return result;
         
         String[] parts = list.trim().split(",");
@@ -303,7 +303,7 @@ public class MAUtils
         int lz2 = z1 + 6;
         
         // Save the precious patch
-        HashMap<EntityPosition,Integer> preciousPatch = new HashMap<EntityPosition,Integer>();
+        HashMap<EntityPosition,Integer> preciousPatch = new HashMap<>();
         Location lo;
         int id;
         for (int i = x1; i <= x2; i++)

src/main/java/com/garbagemule/MobArena/MobArena.java

@@ -283,7 +283,7 @@ public class MobArena extends JavaPlugin
     }
     
     private void registerInventories() {
-        this.inventoriesToRestore = new HashSet<String>();
+        this.inventoriesToRestore = new HashSet<>();
         
         File dir = new File(getDataFolder(), "inventories");
         if (!dir.exists()) {

src/main/java/com/garbagemule/MobArena/MonsterManager.java

@@ -23,13 +23,13 @@ public class MonsterManager
     private Set<LivingEntity> mounts;
     
     public MonsterManager() {
-        this.monsters  = new HashSet<LivingEntity>();
+        this.monsters  = new HashSet<>();
-        this.sheep     = new HashSet<LivingEntity>();
+        this.sheep     = new HashSet<>();
-        this.golems    = new HashSet<LivingEntity>();
+        this.golems    = new HashSet<>();
-        this.pets      = new HashSet<Wolf>();
+        this.pets      = new HashSet<>();
-        this.bosses    = new HashMap<LivingEntity,MABoss>();
+        this.bosses    = new HashMap<>();
-        this.suppliers = new HashMap<LivingEntity,List<ItemStack>>();
+        this.suppliers = new HashMap<>();
-        this.mounts    = new HashSet<LivingEntity>();
+        this.mounts    = new HashSet<>();
     }
     
     public void reset() {

src/main/java/com/garbagemule/MobArena/RewardManager.java

@@ -24,8 +24,8 @@ public class RewardManager
     public RewardManager(Arena arena) {
         this.plugin   = arena.getPlugin();
         this.arena    = arena;
-        this.players  = new HashMap<Player,List<ItemStack>>();
+        this.players  = new HashMap<>();
-        this.rewarded = new HashSet<Player>();
+        this.rewarded = new HashSet<>();
     }
     
     public void reset() {

src/main/java/com/garbagemule/MobArena/commands/CommandHandler.java

@@ -133,7 +133,7 @@ public class CommandHandler implements CommandExecutor
      * @return a list of commands whose patterns match the given string
      */
     private List<Command> getMatchingCommands(String arg) {
-        List<Command> result = new ArrayList<Command>();
+        List<Command> result = new ArrayList<>();
         
         // Grab the commands that match the argument.
         for (Entry<String,Command> entry : commands.entrySet()) {
@@ -209,7 +209,7 @@ public class CommandHandler implements CommandExecutor
      * method, but this is neater, albeit more manual work.
      */
     private void registerCommands() {
-        commands = new LinkedHashMap<String,Command>();
+        commands = new LinkedHashMap<>();
         
         // mobarena.use
         register(JoinCommand.class);

src/main/java/com/garbagemule/MobArena/commands/setup/SetupCommand.java

@@ -127,7 +127,7 @@ public class SetupCommand implements Command, Listener {
             player.getInventory().setContents(getToolbox());
             player.getInventory().setHeldItemSlot(0);
 
-            this.missing = new ArrayList<String>();
+            this.missing = new ArrayList<>();
             this.next = color(String.format(
                     "Setup Mode for arena &a%s&r. Type &e?&r for help.",
                     "&a" + arena.configName() + "&r"

src/main/java/com/garbagemule/MobArena/commands/user/PlayerListCommand.java

@@ -38,7 +38,7 @@ public class PlayerListCommand implements Command
             list = MAUtils.listToString(arena.getPlayersInArena(), am.getPlugin());
         } else {
             StringBuilder buffy = new StringBuilder();
-            List<Player> players = new LinkedList<Player>();
+            List<Player> players = new LinkedList<>();
             
             for (Arena arena : am.getArenas()) {
                 players.addAll(arena.getPlayersInArena());

src/main/java/com/garbagemule/MobArena/events/ArenaCompleteEvent.java

@@ -16,7 +16,7 @@ public class ArenaCompleteEvent extends Event {
 
     public ArenaCompleteEvent(Arena arena) {
         this.arena = arena;
-        this.survivors = new HashSet<Player>();
+        this.survivors = new HashSet<>();
         this.survivors.addAll(arena.getPlayersInArena());
     }
 

src/main/java/com/garbagemule/MobArena/leaderboards/Leaderboard.java

@@ -39,8 +39,8 @@ public class Leaderboard
     {
         this.plugin = plugin;
         this.arena  = arena;
-        this.boards = new ArrayList<LeaderboardColumn>();
+        this.boards = new ArrayList<>();
-        this.stats  = new ArrayList<ArenaPlayerStatistics>();
+        this.stats  = new ArrayList<>();
     }
     
     /**
@@ -183,7 +183,7 @@ public class Leaderboard
             if (stat == null) continue;
             
             // Create the list of signs
-            List<Sign> signs = new ArrayList<Sign>();
+            List<Sign> signs = new ArrayList<>();
             current = header;
             for (int i = 1; i < rows; i++)
             {

src/main/java/com/garbagemule/MobArena/region/ArenaRegion.java

@@ -95,7 +95,7 @@ public class ArenaRegion
     }
     
     public void reloadSpawnpoints() {
-        spawnpoints = new HashMap<String,Location>();
+        spawnpoints = new HashMap<>();
         Set<String> keys = spawns.getKeys(false);
         if (keys != null) {
             for (String spwn : keys) {
@@ -105,7 +105,7 @@ public class ArenaRegion
     }
     
     public void reloadChests() {
-        containers = new HashMap<String,Location>();
+        containers = new HashMap<>();
         Set<String> keys = chests.getKeys(false);
         if (keys != null) {
             for (String chst : keys) {
@@ -131,7 +131,7 @@ public class ArenaRegion
         verifyData();
         
         // Prepare the list
-        List<String> list = new ArrayList<String>();
+        List<String> list = new ArrayList<>();
 
         // Region points
         if (region) {
@@ -363,7 +363,7 @@ public class ArenaRegion
     }
     
     public List<Chunk> getChunks() {
-        List<Chunk> result = new ArrayList<Chunk>();
+        List<Chunk> result = new ArrayList<>();
         
         if (p1 == null || p2 == null) {
             return result;
@@ -406,7 +406,7 @@ public class ArenaRegion
     }
     
     public List<Location> getSpawnpointList() {
-        return new ArrayList<Location>(spawnpoints.values());
+        return new ArrayList<>(spawnpoints.values());
     }
     
     public Collection<Location> getContainers() {
@@ -626,7 +626,7 @@ public class ArenaRegion
         }
 
         // Find all the spawnpoints that cover the location
-        Map<String,Location> map = new HashMap<String,Location>();
+        Map<String,Location> map = new HashMap<>();
         for (Map.Entry<String,Location> entry : spawnpoints.entrySet()) {
             if (p.getLocation().distanceSquared(entry.getValue()) < MobArena.MIN_PLAYER_DISTANCE_SQUARED) {
                 map.put(entry.getKey(), entry.getValue());
@@ -673,7 +673,7 @@ public class ArenaRegion
             @Override
             public void run() {
                 // Grab all the blocks, and send block change events.
-                final Map<Location,BlockState> blocks = new HashMap<Location,BlockState>();
+                final Map<Location,BlockState> blocks = new HashMap<>();
                 for (Location l : points) {
                     Block b = l.getBlock();
                     blocks.put(l, b.getState());
@@ -702,7 +702,7 @@ public class ArenaRegion
     }
 
     private List<Location> getFramePoints(Location loc1, Location loc2) {
-        List<Location> result = new ArrayList<Location>();
+        List<Location> result = new ArrayList<>();
         int x1 = loc1.getBlockX(); int y1 = loc1.getBlockY(); int z1 = loc1.getBlockZ();
         int x2 = loc2.getBlockX(); int y2 = loc2.getBlockY(); int z2 = loc2.getBlockZ();
 

src/main/java/com/garbagemule/MobArena/util/ItemParser.java

@@ -126,11 +126,11 @@ public class ItemParser
     
     public static List<ItemStack> parseItems(String s) {
         if (s == null) {
-            return new ArrayList<ItemStack>(1);
+            return new ArrayList<>(1);
         }
         
         String[] items = s.split(",");
-        List<ItemStack> result = new ArrayList<ItemStack>(items.length);
+        List<ItemStack> result = new ArrayList<>(items.length);
         
         for (String item : items) {
             ItemStack stack = parseItem(item.trim());

src/main/java/com/garbagemule/MobArena/util/PotionEffectParser.java

@@ -17,7 +17,7 @@ public class PotionEffectParser
         if (s == null || s.isEmpty())
             return null;
         
-        List<PotionEffect> potions = new ArrayList<PotionEffect>();
+        List<PotionEffect> potions = new ArrayList<>();
         for (String potion : s.split(",")) {
             PotionEffect eff = parsePotionEffect(potion.trim());
             if (eff != null) {

src/main/java/com/garbagemule/MobArena/util/inventory/InventoryManager.java

@@ -26,8 +26,8 @@ public class InventoryManager
         this.dir    = new File(arena.getPlugin().getDataFolder(), "inventories");
         this.dir.mkdir();
         
-        this.items  = new HashMap<Player,ItemStack[]>();
+        this.items  = new HashMap<>();
-        this.armor  = new HashMap<Player,ItemStack[]>();
+        this.armor  = new HashMap<>();
     }
     
     public void storeInv(Player p) throws IOException {

src/main/java/com/garbagemule/MobArena/util/inventory/InventoryUtils.java

@@ -8,7 +8,7 @@ import java.util.List;
 public class InventoryUtils
 {
     public static List<ItemStack> extractAll(int id, List<ItemStack> items) {
-        List<ItemStack> result = new ArrayList<ItemStack>();
+        List<ItemStack> result = new ArrayList<>();
 
         for (ItemStack stack : items) {
             if (stack.getTypeId() == id) {

src/main/java/com/garbagemule/MobArena/waves/SheepBouncer.java

@@ -26,7 +26,7 @@ public class SheepBouncer implements Runnable
         }
         
         // Put all the sheep in a new collection for iteration purposes.
-        sheep = new HashSet<LivingEntity>(arena.getMonsterManager().getExplodingSheep());
+        sheep = new HashSet<>(arena.getMonsterManager().getExplodingSheep());
         
         // If there are no sheep, reschedule and return.
         if (sheep.isEmpty()) {

src/main/java/com/garbagemule/MobArena/waves/WaveManager.java

@@ -34,7 +34,7 @@ public class WaveManager
     public void reset() {
         reloadWaves();
         wave = 0;
-        singleWavesInstance = new TreeSet<Wave>(singleWaves);
+        singleWavesInstance = new TreeSet<>(singleWaves);
     }
     
     public void reloadWaves() {
@@ -119,7 +119,7 @@ public class WaveManager
     }
     
     private SortedSet<Wave> getMatchingRecurrentWaves(int wave) {
-        TreeSet<Wave> result = new TreeSet<Wave>(WaveUtils.getRecurrentComparator());
+        TreeSet<Wave> result = new TreeSet<>(WaveUtils.getRecurrentComparator());
         for (Wave w : recurrentWaves) {
             if (w.matches(wave)) {
                 result.add(w);

src/main/java/com/garbagemule/MobArena/waves/WaveParser.java

@@ -42,7 +42,7 @@ public class WaveParser
 {
     public static TreeSet<Wave> parseWaves(Arena arena, ConfigurationSection config, WaveBranch branch) {
         // Create a TreeSet with the Comparator for the specific branch.
-        TreeSet<Wave> result = new TreeSet<Wave>(WaveUtils.getComparator(branch));
+        TreeSet<Wave> result = new TreeSet<>(WaveUtils.getComparator(branch));
         
         // If the config is null, return the empty set.
         if (config == null) {
@@ -358,7 +358,7 @@ public class WaveParser
         }
         
         // Prepare the map.
-        SortedMap<Integer,MACreature> monsterMap = new TreeMap<Integer,MACreature>();
+        SortedMap<Integer,MACreature> monsterMap = new TreeMap<>();
         int sum = 0;
         String path = "monsters.";
         
@@ -378,7 +378,7 @@ public class WaveParser
     }
     
     private static List<Location> getSpawnpoints(Arena arena, String name, ConfigurationSection config) {
-        List<Location> result = new ArrayList<Location>();
+        List<Location> result = new ArrayList<>();
         
         String spawnString = config.getString("spawnpoints");
         if (spawnString == null) {
@@ -414,7 +414,7 @@ public class WaveParser
             return null;
         }
         
-        Map<String,List<Upgrade>> upgrades = new HashMap<String,List<Upgrade>>();
+        Map<String,List<Upgrade>> upgrades = new HashMap<>();
         String path = "upgrades.";
         
         for (String className : classes) {
@@ -424,7 +424,7 @@ public class WaveParser
             if (val instanceof String) {
                 itemList = (String) val;
                 List<ItemStack> stacks = ItemParser.parseItems(itemList);
-                List<Upgrade> list = new ArrayList<Upgrade>();
+                List<Upgrade> list = new ArrayList<>();
                 for (ItemStack stack : stacks) {
                     list.add(new GenericUpgrade(stack));
                 }
@@ -433,7 +433,7 @@ public class WaveParser
             // New complex setup
             else if (val instanceof ConfigurationSection) {
                 ConfigurationSection classSection = (ConfigurationSection) val;
-                List<Upgrade> list = new ArrayList<Upgrade>();
+                List<Upgrade> list = new ArrayList<>();
 
                 // Items (Generic + Weapons)
                 itemList = classSection.getString("items", null);
@@ -468,7 +468,7 @@ public class WaveParser
     }
     
     public static Wave createDefaultWave() {
-        SortedMap<Integer,MACreature> monsters = new TreeMap<Integer,MACreature>();
+        SortedMap<Integer,MACreature> monsters = new TreeMap<>();
         monsters.put(10, MACreature.ZOMBIE);
         monsters.put(20, MACreature.SKELETON);
         monsters.put(30, MACreature.SPIDER);

src/main/java/com/garbagemule/MobArena/waves/WaveUtils.java

@@ -20,7 +20,7 @@ public class WaveUtils
      */
     public static List<Location> getValidSpawnpoints(Arena arena, List<Location> spawnpoints, Collection<Player> players) {
         MobArena plugin = arena.getPlugin();
-        List<Location> result = new ArrayList<Location>();
+        List<Location> result = new ArrayList<>();
         
         // Ensure that we do have some spawnpoints.
         if (spawnpoints == null || spawnpoints.isEmpty()) {

src/main/java/com/garbagemule/MobArena/waves/ability/AbilityManager.java

@@ -64,7 +64,7 @@ public class AbilityManager
      * Load all the core abilities included in MobArena
      */
     public static void loadCoreAbilities() {
-        if (abilities == null) abilities = new HashMap<String,Class<? extends Ability>>();
+        if (abilities == null) abilities = new HashMap<>();
 
         register(ChainLightning.class);
         register(DisorientDistant.class);
@@ -96,7 +96,7 @@ public class AbilityManager
      * @param classDir a directory of .class (and/or .java) files
      */
     public static void loadCustomAbilities(File classDir) {
-        if (abilities == null) abilities = new HashMap<String,Class<? extends Ability>>();
+        if (abilities == null) abilities = new HashMap<>();
         
         // Grab the source directory.
         File javaDir = new File(classDir, "src");
@@ -179,7 +179,7 @@ public class AbilityManager
     }
     
     private static List<File> getSourceFilesToCompile(File javaDir, File classDir) {
-        List<File> result = new ArrayList<File>();
+        List<File> result = new ArrayList<>();
         
         if (javaDir == null || !javaDir.exists()) {
             return result;

src/main/java/com/garbagemule/MobArena/waves/ability/AbilityUtils.java

@@ -43,7 +43,7 @@ public class AbilityUtils
      * @return a random arena player, or null if none were found
      */
     public static Player getRandomPlayer(Arena arena) {
-        List<Player> list = new ArrayList<Player>(arena.getPlayersInArena());
+        List<Player> list = new ArrayList<>(arena.getPlayersInArena());
         if (list.isEmpty()) return null;
         
         return list.get(random.nextInt(list.size()));
@@ -57,7 +57,7 @@ public class AbilityUtils
      * @return a list of nearby players
      */
     public static List<Player> getNearbyPlayers(Arena arena, Entity boss, int x) {
-        List<Player> result = new ArrayList<Player>();
+        List<Player> result = new ArrayList<>();
         for (Entity e : boss.getNearbyEntities(x, x, x)) {
             if (arena.getPlayersInArena().contains(e)) {
                 result.add((Player) e);
@@ -74,7 +74,7 @@ public class AbilityUtils
      * @return a list of distant players
      */
     public static List<Player> getDistantPlayers(Arena arena, Entity boss, int x) {
-        List<Player> result = new ArrayList<Player>();
+        List<Player> result = new ArrayList<>();
         for (Player p : arena.getPlayersInArena()) {
             if (MAUtils.distanceSquared(arena.getPlugin(), p, boss.getLocation()) > (double) (x*x)) {
                 result.add(p);

src/main/java/com/garbagemule/MobArena/waves/ability/core/ShufflePositions.java

@@ -25,7 +25,7 @@ public class ShufflePositions implements Ability
         entities.add(boss.getEntity());
         
         // Grab the locations
-        List<Location> locations = new LinkedList<Location>();
+        List<Location> locations = new LinkedList<>();
         for (LivingEntity e : entities) {
             locations.add(e.getLocation());
         }

src/main/java/com/garbagemule/MobArena/waves/types/BossWave.java

@@ -43,9 +43,9 @@ public class BossWave extends AbstractWave
     
     public BossWave(MACreature monster) {
         this.monster   = monster;
-        this.bosses    = new HashSet<MABoss>();
+        this.bosses    = new HashSet<>();
-        this.abilities = new ArrayList<Ability>();
+        this.abilities = new ArrayList<>();
-        this.potions = new ArrayList<PotionEffect>();
+        this.potions = new ArrayList<>();
         this.activated = false;
         this.abilityAnnounce = false;
         this.setType(WaveType.BOSS);
@@ -57,7 +57,7 @@ public class BossWave extends AbstractWave
     
     @Override
     public Map<MACreature,Integer> getMonstersToSpawn(int wave, int playerCount, Arena arena) {
-        Map<MACreature,Integer> result = new HashMap<MACreature,Integer>();
+        Map<MACreature,Integer> result = new HashMap<>();
         result.put(monster, 1);
         return result;
     }
@@ -92,7 +92,7 @@ public class BossWave extends AbstractWave
     }
     
     public Set<MABoss> getMABosses() {
-        Set<MABoss> result = new HashSet<MABoss>();
+        Set<MABoss> result = new HashSet<>();
         for (MABoss b : bosses) {
             if (!b.isDead()) {
                 result.add(b);

src/main/java/com/garbagemule/MobArena/waves/types/DefaultWave.java

@@ -38,7 +38,7 @@ public class DefaultWave extends AbstractWave
         Random random = new Random();
         
         // Prepare the monster map.
-        Map<MACreature,Integer> monsters = new HashMap<MACreature,Integer>();
+        Map<MACreature,Integer> monsters = new HashMap<>();
         
         // Generate some random amounts.
         for (int i = 0; i < toSpawn; i++) {
@@ -60,7 +60,7 @@ public class DefaultWave extends AbstractWave
     }
 
     private Map<MACreature,Integer> getFixed() {
-        Map<MACreature,Integer> result = new HashMap<MACreature,Integer>();
+        Map<MACreature,Integer> result = new HashMap<>();
 
         // For fixed waves, we just convert the accumulated map
         int last = 0;

src/main/java/com/garbagemule/MobArena/waves/types/SpecialWave.java

@@ -27,7 +27,7 @@ public class SpecialWave extends AbstractWave
         int value = random.nextInt(monsterMap.lastKey()); 
 
         // Prepare the monster map.
-        Map<MACreature,Integer> result = new HashMap<MACreature,Integer>();
+        Map<MACreature,Integer> result = new HashMap<>();
         
         for (Map.Entry<Integer,MACreature> entry : monsterMap.entrySet()) {
             if (value > entry.getKey()) {

src/main/java/com/garbagemule/MobArena/waves/types/SupplyWave.java

@@ -33,7 +33,7 @@ public class SupplyWave extends AbstractWave
         Random random = new Random();
         
         // Prepare the monster map.
-        Map<MACreature,Integer> monsters = new HashMap<MACreature,Integer>();
+        Map<MACreature,Integer> monsters = new HashMap<>();
         
         int toSpawn = (int) Math.max(1D, playerCount * super.getAmountMultiplier());
         
@@ -66,7 +66,7 @@ public class SupplyWave extends AbstractWave
 
     public Wave copy() {
         SupplyWave result = new SupplyWave(monsterMap);
-        result.drops = new ArrayList<ItemStack>(this.drops);
+        result.drops = new ArrayList<>(this.drops);
 
         // From AbstractWave
         result.setAmountMultiplier(getAmountMultiplier());

src/main/java/com/garbagemule/MobArena/waves/types/SwarmWave.java

@@ -24,7 +24,7 @@ public class SwarmWave extends AbstractWave
     @Override
     public Map<MACreature,Integer> getMonstersToSpawn(int wave, int playerCount, Arena arena) {
         // Prepare the monster map.
-        Map<MACreature,Integer> result = new HashMap<MACreature,Integer>();
+        Map<MACreature,Integer> result = new HashMap<>();
         
         // Add the monster and the swarm amount.
         int toSpawn = (int) Math.max(1D, amount.getAmount(playerCount) * super.getAmountMultiplier());

src/main/java/com/garbagemule/MobArena/waves/types/UpgradeWave.java

@@ -27,7 +27,7 @@ public class UpgradeWave extends AbstractWave
     
     @Override
     public Map<MACreature,Integer> getMonstersToSpawn(int wave, int playerCount, Arena arena) {
-        return new HashMap<MACreature,Integer>();
+        return new HashMap<>();
     }
 
     public void grantItems(Arena arena, Player p, String className) {
@@ -49,9 +49,9 @@ public class UpgradeWave extends AbstractWave
     }
 
     public Wave copy() {
-        Map<String,List<Upgrade>> upgrades = new HashMap<String,List<Upgrade>>();
+        Map<String,List<Upgrade>> upgrades = new HashMap<>();
         for (Map.Entry<String,List<Upgrade>> entry : this.upgrades.entrySet()) {
-            upgrades.put(entry.getKey(), new ArrayList<Upgrade>(entry.getValue()));
+            upgrades.put(entry.getKey(), new ArrayList<>(entry.getValue()));
         }
         UpgradeWave result = new UpgradeWave(upgrades);
         result.giveAll = this.giveAll;