For BukkitForum

package de.[Censored].first.commands;

import org.bukkit.Material;
import org.bukkit.command.Command;
import org.bukkit.command.CommandExecutor;
import org.bukkit.command.CommandSender;
import org.bukkit.entity.Player;
import org.bukkit.inventory.ItemStack;

public class ClearSlotCommand implements CommandExecutor{

    @Override
    public boolean onCommand(CommandSender sender, Command command, String label, String[] args)
    {
        if(sender instanceof Player)
        {
            Player player = (Player) sender;

            if(player.hasPermission("first.clearslot"))
            {
                if(args.length == 1)
                {
                    ItemStack item = new ItemStack(Material.AIR);
                    if(args[0].toLowerCase() == "helmet")
                    {
                        player.getInventory().setHelmet(item);
                    }
                    if(args[0].toLowerCase() == "chest" || args[0].toLowerCase() == "chestplate")
                    {
                        player.getInventory().setChestplate(item);
                    }
                    else if(args[0].toLowerCase() == "leggings")
                    {
                        player.getInventory().setLeggings(item);
                    }
                    else if(args[0].toLowerCase() == "boots")
                    {
                        player.getInventory().setBoots(item);
                    }
                    else
                    {
                        try
                        {
                            int slot = Integer.parseInt(args[0]);
                            slot--;
                            //Bereich: 1-36 und 100-103
                            if(slot >= 1 && slot <= 36 || slot >= 100 && slot <= 103)
                            {
                                player.getInventory().setItem(slot, item);
                                player.sendMessage("§aSlot wurde geleert!");
                            }
                            else
                            {
                                player.sendMessage("§4Bitte benutze /clearslot Helmet/Chestplate/Leggings/Helmet/[Nummer]");
                                player.sendMessage("§6http://redditpublic.com/images/b/b2/Items_slot_number.png");
                            }
                        }
                        catch (NumberFormatException e)
                        {
                            player.sendMessage("§4Bitte benutze /clearslot Helmet/Chestplate/Leggings/Helmet/[Nummer]");
                            player.sendMessage("§6http://redditpublic.com/images/b/b2/Items_slot_number.png");
                        }
                    }
                }
                else
                {
                    player.sendMessage("Bitte benutze: /clearslot [Nr]");
                }
            }
            else
            {
                player.sendMessage("§4Dazu hast du keine Berechtigungen!");
            }
        }
        return false;
    }
}