ItemRenamer

package rename;

import org.bukkit.ChatColor;
import org.bukkit.Material;
import org.bukkit.command.Command;
import org.bukkit.command.CommandSender;
import org.bukkit.entity.Player;
import org.bukkit.inventory.meta.ItemMeta;
import org.bukkit.plugin.java.JavaPlugin;

public class ItemRenamer extends JavaPlugin{

    @Override
    public boolean onCommand(CommandSender sender, Command cmd, String cmdLabel, String[] args){

        if(!(sender instanceof Player))
            return true;

        Player player = (Player) sender;

        if(cmd.getName().equalsIgnoreCase("rename")){
            if (!sender.hasPermission("rename.use")) return true;
            if(args.length == 0)
                return false;

            String newName = "";

            for(String arg : args){
                if(newName.length() > 0)
                    newName += "";
                newName+= arg;
            }

            newName = ChatColor.translateAlternateColorCodes('&', newName);

            if(player.getItemInHand() == null || player.getItemInHand().getType() == Material.AIR){
                player.sendMessage(ChatColor.RED + "You must hold item that you want to rename!");
                return true;
            }

            ItemMeta meta = player.getItemInHand().getItemMeta();
            meta.setDisplayName(newName);
            player.getItemInHand().setItemMeta(meta);

            player.sendMessage(ChatColor.DARK_AQUA + "Name changed to: " + ChatColor.RESET + newName);
        }
        return true;
    }

}