Replace use of the deprecated getDisplayName() with displayName().

src/main/java/net/theprogrammersworld/herobrine/AI/AICore.java

@@ -259,7 +259,7 @@ public class AICore {
 				int chance = Utils.getRandomGen().nextInt(100);
 				if (chance <= 10) {
 					if (Herobrine.getPluginCore().getConfigDB().UseGraveyardWorld == true) {
-						log.info("[Herobrine] Teleporting " + PlayerTarget.getDisplayName() + " to Herobrine's Graveyard.");
+						log.info("[Herobrine] Teleporting " + PlayerTarget.displayName() + " to Herobrine's Graveyard.");
 
 						getCore(CoreType.GRAVEYARD).RunCore(data);
 

src/main/java/net/theprogrammersworld/herobrine/AI/cores/Attack.java

@@ -35,7 +35,7 @@ public class Attack extends Core {
 		if (!PluginCore.getAICore().checkAncientSword(player.getInventory())) {
 			if (PluginCore.getSupport().checkAttack(player.getLocation())) {
 				if (!PluginCore.canAttackPlayerNoMSG(player)) {
-					return new CoreResult(false, player.getDisplayName() + " cannot be attacked because they are protected.");
+					return new CoreResult(false, player.displayName() + " cannot be attacked because they are protected.");
 				}
 
 				Herobrine.HerobrineHP = Herobrine.HerobrineMaxHP;
@@ -61,10 +61,10 @@ public class Attack extends Core {
 
 				return new CoreResult(true, "Herobrine is currently attacking " + player.getName() + ".");
 			} else {
-				return new CoreResult(false, AICore.PlayerTarget.getDisplayName() + " cannot be attacked because they are in a protected area.");
+				return new CoreResult(false, AICore.PlayerTarget.displayName() + " cannot be attacked because they are in a protected area.");
 			}
 		} else {
-			return new CoreResult(false, player.getDisplayName() + " cannot be attacked because they have an Ancient Sword.");
+			return new CoreResult(false, player.displayName() + " cannot be attacked because they have an Ancient Sword.");
 		}
 	}
 

src/main/java/net/theprogrammersworld/herobrine/AI/cores/Book.java

@@ -42,7 +42,7 @@ public class Book extends Core {
 					return new CoreResult(false, "Herobrine's books are prohibited.");
 				}
 			} else {
-				return new CoreResult(false, player.getDisplayName() + " is in a world that Herobrine is not allowed in.");
+				return new CoreResult(false, player.displayName() + " is in a world that Herobrine is not allowed in.");
 			}
 		}
 		return new CoreResult(false, "Herobrine's book creation failed.");

src/main/java/net/theprogrammersworld/herobrine/AI/cores/Burn.java

@@ -16,7 +16,7 @@ public class Burn extends Core {
 	public CoreResult CallCore(Object[] data) {
 		Player player = (Player) data[0];
 		player.setFireTicks(800);
-		return new CoreResult(true, player.getDisplayName() + " was burned by Herobrine.");
+		return new CoreResult(true, player.displayName() + " was burned by Herobrine.");
 	}
 
 }

src/main/java/net/theprogrammersworld/herobrine/AI/cores/BuryPlayer.java

@@ -64,17 +64,17 @@ public class BuryPlayer extends Core {
 						&& Herobrine.getPluginCore().getSupport().checkBuild(loc.getWorld()
 								.getBlockAt(loc.getBlockX(), loc.getBlockY() - 1, loc.getBlockZ() - 2).getLocation())) {
 					Bury(loc.getWorld(), loc.getBlockX(), loc.getBlockY(), loc.getBlockZ(), player);
-					return new CoreResult(true, player.getDisplayName() + " was buried by Herobrine.");
+					return new CoreResult(true, player.displayName() + " was buried by Herobrine.");
 				} else {
-					return new CoreResult(false, player.getDisplayName() + " is in a protected area and cannot be buried.");
+					return new CoreResult(false, player.displayName() + " is in a protected area and cannot be buried.");
 				}
 			}
 		} else {
-			return new CoreResult(false, player.getDisplayName()
+			return new CoreResult(false, player.displayName()
 					+ " could not be buried because a good burial location could not be found.");
 		}
 		return new CoreResult(false,
-				player.getDisplayName() + " could not be buried because a good burial location could not be found.");
+				player.displayName() + " could not be buried because a good burial location could not be found.");
 	}
 
 	public void Bury(World world, int X, int Y, int Z, Player player) {

src/main/java/net/theprogrammersworld/herobrine/AI/cores/Curse.java

@@ -40,7 +40,7 @@ public class Curse extends Core {
 			}, i * 150L);
 		}
 
-		return new CoreResult(true, player.getDisplayName() + " has been cursed by Herobrine.");
+		return new CoreResult(true, player.displayName() + " has been cursed by Herobrine.");
 	}
 
 }

src/main/java/net/theprogrammersworld/herobrine/AI/cores/Graveyard.java

@@ -77,9 +77,9 @@ public class Graveyard extends Core {
 				AICore.isTarget = true;
 				Bukkit.getServer().getWorld(Herobrine.getPluginCore().getConfigDB().HerobrineWorldName).setStorm(false);
 				
-				return new CoreResult(true, player.getDisplayName() + " was successfully teleported to Herobrine's Graveyard.");
+				return new CoreResult(true, player.displayName() + " was successfully teleported to Herobrine's Graveyard.");
 			} else {
-				return new CoreResult(false, player.getDisplayName() + " cannot be attacked because they have an Ancient Sword.");
+				return new CoreResult(false, player.displayName() + " cannot be attacked because they have an Ancient Sword.");
 			}
 		}
 		return new CoreResult(false, "Herobrine's Graveyard is disabled.");

src/main/java/net/theprogrammersworld/herobrine/AI/cores/Haunt.java

@@ -36,7 +36,7 @@ public class Haunt extends Core {
 	public CoreResult setHauntTarget(Player player) {
 		if (PluginCore.getSupport().checkHaunt(player.getLocation())) {
 			if (!PluginCore.canAttackPlayerNoMSG(player)) {
-				return new CoreResult(false, player.getDisplayName() + " cannot be attacked because they are protected.");
+				return new CoreResult(false, player.displayName() + " cannot be attacked because they are protected.");
 			}
 			spawnedWolves = 0;
 			spawnedBats = 0;
@@ -44,15 +44,15 @@ public class Haunt extends Core {
 			isFirst = true;
 			AICore.isTarget = true;
 			AICore.PlayerTarget = player;
-			AICore.log.info("[Herobrine] " + player.getDisplayName() + " is now being haunted by Herobrine.");
+			AICore.log.info("[Herobrine] " + player.displayName() + " is now being haunted by Herobrine.");
 			Location loc = (Location) PluginCore.HerobrineNPC.getBukkitEntity().getLocation();
 			loc.setY(-20);
 			PluginCore.HerobrineNPC.moveTo(loc);
 
 			StartHandler();
-			return new CoreResult(true, player.getDisplayName() + " is now being haunted by Herobrine.");
+			return new CoreResult(true, player.displayName() + " is now being haunted by Herobrine.");
 		}
-		return new CoreResult(false, player.getDisplayName() + " cannot be haunted because they are in a secure area.");
+		return new CoreResult(false, player.displayName() + " cannot be haunted because they are in a secure area.");
 	}
 
 	public void StartHandler() {

src/main/java/net/theprogrammersworld/herobrine/AI/cores/Heads.java

@@ -68,13 +68,13 @@ public class Heads extends Core {
 							}
 						}, 1 * 100L);
 
-						return new CoreResult(true, "Herobrine spawned heads near " + player.getDisplayName() + ".");
+						return new CoreResult(true, "Herobrine spawned heads near " + player.displayName() + ".");
 
 					} else {
 						return new CoreResult(false, "Herobrine head-spawning is disabled.");
 					}
 				} else {
-					return new CoreResult(false, player.getDisplayName() + " cannot be haunted with heads because they are in a secure area.");
+					return new CoreResult(false, player.displayName() + " cannot be haunted with heads because they are in a secure area.");
 				}
 			} else {
 				return new CoreResult(false, "Player cannot be haunted with heads because they are offline.");

src/main/java/net/theprogrammersworld/herobrine/AI/cores/RandomExplosion.java

@@ -28,13 +28,13 @@ public class RandomExplosion extends Core {
 				loc.getWorld().createExplosion(new Location(loc.getWorld(), x, y, z), 1.0f);
 
 			} else {
-				return new CoreResult(true, "Herobrine cannot produce an explosion near " + player.getDisplayName() +
+				return new CoreResult(true, "Herobrine cannot produce an explosion near " + player.displayName() +
 						" because they are in a secure area.");
 			}
 		} else {
 			return new CoreResult(true, "Herobrine explosions are not allowed.");
 		}
-		return new CoreResult(true, "Herobrine produced an explosion near " + player.getDisplayName() + ".");
+		return new CoreResult(true, "Herobrine produced an explosion near " + player.displayName() + ".");
 	}
 
 }

src/main/java/net/theprogrammersworld/herobrine/AI/cores/Temple.java

@@ -86,7 +86,7 @@ public class Temple extends Core {
 					}
 					if (canBuild == true) {
 						Create(loc.getWorld(), i2 + loc.getBlockX(), i1 + loc.getBlockY(), i3 + loc.getBlockZ());
-						return new CoreResult(true, "Creating a temple near " + player.getDisplayName() + ".");
+						return new CoreResult(true, "Creating a temple near " + player.displayName() + ".");
 					}
 				}
 

src/main/java/net/theprogrammersworld/herobrine/Herobrine.java

@@ -297,18 +297,18 @@ public class Herobrine extends JavaPlugin implements Listener {
 		
 			if(sender == null){			
 				if (!opCheck)
-					log.info("[Herobrine] " + player.getDisplayName() + " is an OP.");
+					log.info("[Herobrine] " + player.displayName() + " is an OP.");
 				else if (!creativeCheck)
-					log.info("[Herobrine] " + player.getDisplayName() + " is in creative mode.");
+					log.info("[Herobrine] " + player.displayName() + " is in creative mode.");
 				else if (!ignoreCheck)
-					log.info("[Herobrine] " + player.getDisplayName() + " has ignore permission.");			
+					log.info("[Herobrine] " + player.displayName() + " has ignore permission.");			
 			}else{
 				if (!opCheck)
-					sender.sendMessage(ChatColor.RED + "[Herobrine] " + player.getDisplayName() + " is an OP.");
+					sender.sendMessage(ChatColor.RED + "[Herobrine] " + player.displayName() + " is an OP.");
 				else if (!creativeCheck)
-					sender.sendMessage(ChatColor.RED + "[Herobrine] " + player.getDisplayName() + " is in creative mode.");
+					sender.sendMessage(ChatColor.RED + "[Herobrine] " + player.displayName() + " is in creative mode.");
 				else if (!ignoreCheck)
-					sender.sendMessage(ChatColor.RED + "[Herobrine] " + player.getDisplayName() + " has ignore permission.");
+					sender.sendMessage(ChatColor.RED + "[Herobrine] " + player.displayName() + " has ignore permission.");
 			}
 			
 			return false;

src/main/java/net/theprogrammersworld/herobrine/misc/ItemName.java

@@ -53,7 +53,7 @@ public class ItemName {
 	}
 
 	public static String getName(ItemStack item) {
-		return item.getItemMeta().getDisplayName();
+		return item.getItemMeta().displayName().toString();
 	}
 
 	public static ItemStack CreateSkull(final UUID uuid, final String data) {