Czemu to nie dziala?

Mam taki kod. On nie dziala, bledy z konsoli.

public class Main extends JavaPlugin implements Listener{

	public static Boolean kity;
	
	@Override
	public void onEnable(){
		Bukkit.getServer().getPluginManager().registerEvents(this, this);
		System.out.println("Wlaczanie...");
		Main.kity = true;
	}
	@Override
	public void onDisable(){
		System.out.println("Wylaczanie...");
		
	}
	@Override
	public boolean onCommand(CommandSender sender, Command cmd, String label, String[] args) {
		
		Player p = (Player) sender;
		
		if(cmd.getName().equalsIgnoreCase("zestawy")){
			if(args.length >= 0){
				if(args[0] == null){
					createMenu(p);
				}
				if(args[0].equalsIgnoreCase("przelacz")){
					if(p.hasPermission("kity.przelacz")){
						if(kity){
							kity = false;
							p.sendMessage("§cWylaczyles kity");
						}else{
							kity = true;
							p.sendMessage("§cWlaczyles kity");
						}	
					}
				}
			}
		}
		return false;
	}
	public void createMenu(Player player){
		Inventory inv = Bukkit.getServer().createInventory(null,9,"§6§lKity");
		
		ItemStack gracz = new ItemStack(Material.STONE_SWORD, 1);
		ItemMeta graczim = gracz.getItemMeta();
		ArrayList<String> graczlore = new ArrayList<String>();
		graczlore.add("§8» §7Kliknij aby otrzymac zestaw gracz");
		graczlore.add("   §a§lKAZDY MOZE OTRZYMAC ZESTAW GRACZ");
		graczim.setDisplayName("§7Zestaw §8Gracz");
		graczim.setLore(graczlore);
		gracz.setItemMeta(graczim);
		
		ItemStack vip = new ItemStack(Material.GOLD_SWORD, 1);
		ItemMeta vipim = vip.getItemMeta();
		ArrayList<String> viplore = new ArrayList<String>();
		viplore.add("§8» §7Kliknij aby otrzymac zestaw §6vip");
		viplore.add("   §a§lKAZDY VIP MOZE OTRZYMAC TEN ZESTAW");
		vipim.setDisplayName("§7Zestaw §6VIP");
		vipim.setLore(viplore);
		vip.setItemMeta(vipim);
		
		ItemStack svip = new ItemStack(Material.DIAMOND_SWORD, 1);
		ItemMeta svipim = svip.getItemMeta();
		ArrayList<String> sviplore = new ArrayList<String>();
		sviplore.add("§8» §7Kliknij aby otrzymac zestaw §9s§6vip");
		sviplore.add("   §a§lKAZDY SVIP MOZE OTRZYMAC TEN ZESTAW");
		svipim.setDisplayName("§7Zestaw §9S§6VIP");
		svipim.setLore(sviplore);
		svip.setItemMeta(svipim);
		
		ItemStack yt = new ItemStack(Material.IRON_SWORD, 1);
		ItemMeta ytim = yt.getItemMeta();
		ArrayList<String> ytlore = new ArrayList<String>();
		ytlore.add("§8» §7Kliknij aby otrzymac zestaw §fY§4T");
		ytlore.add("   §a§lKAZDY YOUTUBER MOZE OTRZYMAC TEN ZESTAW");
		ytim.setDisplayName("§7Zestaw §fY§4T");
		ytim.setLore(ytlore);
		yt.setItemMeta(ytim);
		
		ItemStack glass = new ItemStack(Material.STAINED_GLASS_PANE, 1, (short) 15);
		ItemMeta glassim = glass.getItemMeta();
		glassim.setDisplayName("§0#");
		glass.setItemMeta(glassim);
		
		inv.setItem(0, gracz);
		inv.setItem(1, vip);
		inv.setItem(2, svip);
		inv.setItem(3, yt);
		inv.setItem(4, glass);
		inv.setItem(5, glass);
		inv.setItem(6, glass);
		inv.setItem(7, glass);
		inv.setItem(8, glass);
		player.openInventory(inv);
	}
	@EventHandler	
	public void onInvClick(InventoryClickEvent e){
		
		Player p = (Player) e.getWhoClicked();
		
		if(e.getInventory().getName() != "§6§lKity"){
			return;
		}
		if(e.getCurrentItem().getItemMeta().getDisplayName().contains("§7Zestaw §8Gracz")){
			e.setCancelled(true);
			p.closeInventory();
			p.performCommand("kit gracz");
		}
		if(e.getCurrentItem().getItemMeta().getDisplayName().contains("§0#")){
			e.setCancelled(true);
		}
		if(e.getCurrentItem().getItemMeta().getDisplayName().contains("§7Zestaw §6VIP")){
			e.setCancelled(true);
			if(kity){
				p.closeInventory();
				p.performCommand("kit vip");
			}else{
				p.closeInventory();
				p.sendMessage("§cZestawy sa wylaczone !");
			}
			
		}
		if(e.getCurrentItem().getItemMeta().getDisplayName().contains("§7Zestaw §9S§6VIP")){
			e.setCancelled(true);
			if(kity){
				p.closeInventory();
				p.performCommand("kit svip");
			}else{
				p.closeInventory();
				p.sendMessage("§cZestawy sa wylaczone !");
			}
		}
		if(e.getCurrentItem().getItemMeta().getDisplayName().contains("§7Zestaw §fY§4T")){
			e.setCancelled(true);
			if(kity){
				p.closeInventory();
				p.performCommand("kit yt");
			}else{
				p.closeInventory();
				p.sendMessage("§cZestawy sa wylaczone !");
			}
		}
	}


}

Logi:

[18:55:38 ERROR]: null
org.bukkit.command.CommandException: Unhandled exception executing command 'zestawy' in plugin VHCKity v1.0
	at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46) ~[spigot-1.8.8-R0.1-SNAPSHOT-latest.jar:git-Spigot-db6de12-18fbb24]
	at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:141) ~[spigot-1.8.8-R0.1-SNAPSHOT-latest.jar:git-Spigot-db6de12-18fbb24]
	at org.bukkit.craftbukkit.v1_8_R3.CraftServer.dispatchCommand(CraftServer.java:641) ~[spigot-1.8.8-R0.1-SNAPSHOT-latest.jar:git-Spigot-db6de12-18fbb24]
	at net.minecraft.server.v1_8_R3.PlayerConnection.handleCommand(PlayerConnection.java:1162) [spigot-1.8.8-R0.1-SNAPSHOT-latest.jar:git-Spigot-db6de12-18fbb24]
	at net.minecraft.server.v1_8_R3.PlayerConnection.a(PlayerConnection.java:997) [spigot-1.8.8-R0.1-SNAPSHOT-latest.jar:git-Spigot-db6de12-18fbb24]
	at net.minecraft.server.v1_8_R3.PacketPlayInChat.a(PacketPlayInChat.java:45) [spigot-1.8.8-R0.1-SNAPSHOT-latest.jar:git-Spigot-db6de12-18fbb24]
	at net.minecraft.server.v1_8_R3.PacketPlayInChat.a(PacketPlayInChat.java:1) [spigot-1.8.8-R0.1-SNAPSHOT-latest.jar:git-Spigot-db6de12-18fbb24]
	at net.minecraft.server.v1_8_R3.PlayerConnectionUtils$1.run(SourceFile:13) [spigot-1.8.8-R0.1-SNAPSHOT-latest.jar:git-Spigot-db6de12-18fbb24]
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:1.8.0_151]
	at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_151]
	at net.minecraft.server.v1_8_R3.SystemUtils.a(SourceFile:44) [spigot-1.8.8-R0.1-SNAPSHOT-latest.jar:git-Spigot-db6de12-18fbb24]
	at net.minecraft.server.v1_8_R3.MinecraftServer.B(MinecraftServer.java:715) [spigot-1.8.8-R0.1-SNAPSHOT-latest.jar:git-Spigot-db6de12-18fbb24]
	at net.minecraft.server.v1_8_R3.DedicatedServer.B(DedicatedServer.java:374) [spigot-1.8.8-R0.1-SNAPSHOT-latest.jar:git-Spigot-db6de12-18fbb24]
	at net.minecraft.server.v1_8_R3.MinecraftServer.A(MinecraftServer.java:654) [spigot-1.8.8-R0.1-SNAPSHOT-latest.jar:git-Spigot-db6de12-18fbb24]
	at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:557) [spigot-1.8.8-R0.1-SNAPSHOT-latest.jar:git-Spigot-db6de12-18fbb24]
	at java.lang.Thread.run(Thread.java:748) [?:1.8.0_151]
Caused by: java.lang.ArrayIndexOutOfBoundsException: 0
	at pl.hotangel2k17.kits.Main.onCommand(Main.java:40) ~[?:?]
	at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) ~[spigot-1.8.8-R0.1-SNAPSHOT-latest.jar:git-Spigot-db6de12-18fbb24]
	... 15 more