Hat.java

import net.menoni.rd.RuntimeDebugger;
import net.menoni.rd.model.Debugger;
import org.bukkit.command.CommandSender;
import org.bukkit.entity.Player;
import org.bukkit.inventory.ItemStack;

public class Hat implements Debugger {
	@Override
	public void debug(RuntimeDebugger plugin, CommandSender cs) {
		if (!(cs instanceof Player)) {
			return;
		}
		Player p = (Player) cs;
		
		ItemStack hand = p.getInventory().getItemInMainHand();
		ItemStack helmet = p.getInventory().getHelmet();
		p.getInventory().setHelmet(hand);
		p.getInventory().setItemInMainHand(helmet);
	}
}