package me.MrConHD.goldenheads;

import org.bukkit.Bukkit;
import org.bukkit.ChatColor;
import org.bukkit.Material;
import org.bukkit.inventory.ItemStack;
import org.bukkit.inventory.ShapedRecipe;
import org.bukkit.inventory.meta.ItemMeta;
import org.bukkit.plugin.java.JavaPlugin;

import me.MrConHD.goldenheads.listener.OnConsume;

public class Core extends JavaPlugin {

    @Override
    public void onEnable() {
        getServer().getPluginManager().registerEvents(new OnConsume(), this);

        setupHeads();
    }

    @Override
    public void onDisable() {

    }

    public void setupHeads() {
        ItemStack goldenHead = new ItemStack(Material.GOLDEN_APPLE);
        ItemMeta gMeta = goldenHead.getItemMeta();
        gMeta.setDisplayName(ChatColor.AQUA + "Golden Head");
        goldenHead.setItemMeta(gMeta);

        ShapedRecipe goldenHeadRecipe = new ShapedRecipe(goldenHead);
        goldenHeadRecipe.shape(
                "@@@",
                "@#@" ,
                "@@@");
        goldenHeadRecipe.setIngredient('@', Material.GOLD_INGOT);
        goldenHeadRecipe.setIngredient('#', Material.SKULL_ITEM, (short) 3);
        Bukkit.getServer().addRecipe(goldenHeadRecipe);
    }
}



---------------------------

package me.MrConHD.goldenheads.listener;

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

public class OnConsume implements Listener {

	@EventHandler
    public void onConsume(PlayerItemConsumeEvent e) {
        if (e.getItem().getType() == Material.GOLDEN_APPLE) {
            ItemStack goldenHead = e.getItem();
            if (goldenHead!= null && goldenHead.getItemMeta().getDisplayName().contains("Golden Head")) {
                Player p = e.getPlayer();
                PotionEffect pe = new PotionEffect(PotionEffectType.ABSORPTION, 120*20, 1);
                PotionEffect re = new PotionEffect(PotionEffectType.REGENERATION, 10*20, 1);
                pe.apply(p);
                re.apply(p);
            }

        }
    }
}