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+package com.colt.WorldEffects;%0A%0Aimport java.util.List;%0A%0Aimport org.bukkit.Bukkit;%0Aimport org.bukkit.entity.Player;%0Aimport org.bukkit.event.EventHandler;%0Aimport org.bukkit.event.Listener;%0Aimport org.bukkit.event.player.PlayerInteractEvent;%0Aimport org.bukkit.plugin.java.JavaPlugin;%0Aimport org.bukkit.potion.PotionEffect;%0Aimport org.bukkit.potion.PotionEffectType;%0A%0Apublic class WorldEffects extends JavaPlugin implements Listener %7B%0A%09%0A%09public void onEnable() %7B%0A%09%09    saveDefaultConfig();%0A        Bukkit.getPluginManager().registerEvents(this, this);%0A%09%7D%0A%09%0A%09@EventHandler%0A%09public void move(PlayerInteractEvent e) %7B%0A%09%09Player p = e.getPlayer();%0A%09%09List%3CString%3E worlds = getConfig().getStringList(%22worlds%22);%0A%09%09for(String w : worlds) %7B%0A%09%09%09if(p.getWorld().equals(w) &&%0A%09%09%09%09(!p.hasPotionEffect(PotionEffectType.JUMP) %7C%7C (!p.hasPotionEffect(PotionEffectType.JUMP)))) %7B%0A%09%09%09%09%09PotionEffect jump = new PotionEffect(PotionEffectType.JUMP, 100000000, getConfig().getInt(%22jumpamp%22));%0A%09%09%09%09%09p.addPotionEffect(jump);%0A%09%09%09%09%09PotionEffect speed = new PotionEffect(PotionEffectType.SPEED, 100000000, getConfig().getInt(%22speedamp%22));%0A%09%09%09%09%09p.addPotionEffect(speed);%0A%09%09%09%7D%0A%09%09%7D%0A%09%7D%0A%7D%0A

Create WorldEffects.java