Verbesserung Plugin

package xtra.armor;

import org.bukkit.Material;
import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.inventory.InventoryCloseEvent;
import org.bukkit.inventory.ItemStack;
import org.bukkit.inventory.PlayerInventory;
import org.bukkit.potion.PotionEffect;
import org.bukkit.potion.PotionEffectType;

import flo.xtraitems.XtraMain;

public class PistonBoots implements Listener
{

    private XtraMain plugin;

    public PistonBoots(XtraMain plugin)
    {
        this.plugin = plugin;
        this.plugin.getServer().getPluginManager().registerEvents(this, plugin);
    }

    @EventHandler
        public void armourcheck(InventoryCloseEvent e){
            Player p = (Player) e.getPlayer();
            PlayerInventory pinv = p.getInventory();
            ItemStack boots = pinv.getBoots();
            PotionEffectType peffecttype = PotionEffectType.JUMP;
            final PotionEffect dresist = new PotionEffect(peffecttype, 1000000000, 1);

            if(boots.getType() == Material.LEATHER_BOOTS){
                if(boots.getItemMeta().getDisplayName() == "§0Leather Piston Boots") {
                     p.sendMessage("§2Piston Boots Enabled.");
                     p.addPotionEffect(dresist);
                }

            }else
                if(boots.getType() != Material.LEATHER_BOOTS && boots.getItemMeta().getDisplayName().equalsIgnoreCase("§0Leather Piston Boots")){
                    for (PotionEffect effect : p.getActivePotionEffects()){
                        p.removePotionEffect(effect.getType());
                    }

            }
     }
}