Ominous Plugin Error

name: Eancraft
main: com.gmail.eanwowmaster.Eancraft
version: 1

package com.gmail.eanwowmaster;

import org.bukkit.plugin.java.JavaPlugin;
import org.bukkit.event.player.PlayerDropItemEvent;
import org.bukkit.potion.PotionEffect;
import org.bukkit.potion.PotionEffectType;
import org.bukkit.Location;
import org.bukkit.entity.Entity;
import org.bukkit.entity.Item;
import org.bukkit.entity.Player;
import org.bukkit.potion.PotionEffectTypeWrapper;
import org.bukkit.potion.PotionType;
import org.bukkit.Material;
import org.bukkit.entity.Item;
import org.bukkit.inventory.ItemStack;
import java.util.Random;

public class Eancraft extends JavaPlugin {
Random randomEancraft = new Random();

@Override
public void onEnable() {
getLogger().info("Eancraft plugin enabled!");
}

@Override
public void onDisable() {
getLogger().info("Eancraft plugin disabled!");
}

public void magicDrop(PlayerDropItemEvent evt) {
PotionEffect speed = new PotionEffect(PotionEffectType.SPEED, 10, 2, true);
PotionEffect strength = new PotionEffect(PotionEffectType.INCREASE_DAMAGE, 10, 1, true);
PotionEffect jump = new PotionEffect(PotionEffectType.JUMP, 10, 3, true);
PotionEffect heal = new PotionEffect(PotionEffectType.HEAL, 1, 5, true);
Player player = evt.getPlayer();
Item item = evt.getItemDrop();
if (player.getLocation().getWorld().getName().equals("superSmashCake") || player.getLocation().getWorld().getName().equals ("superSmashEthereal") || player.getLocation().getWorld().getName ().equals ("superSmashFinal") || player.getLocation().getWorld().getName().equals ("superSmashNether")) {
if (evt.getItemDrop() == item) {
player.sendMessage("You activated your Power Emerald!");
evt.setCancelled(true);
player.addPotionEffect(speed);
player.addPotionEffect(strength);
} else if (evt.getItemDrop() == item) {
int isDiamond = randomEancraft.nextInt(2);

if (isDiamond == 0) {
player.sendMessage("It's just a piece of coal...");
} else if (isDiamond == 1) {
player.sendMessage("You found a diamond within your coal!");
evt.setCancelled(true);
player.addPotionEffect(heal);
}
}
}
}
}