CreatureSpawnEvent Custom Name

Hey I writte a Bukkit plugin, I spawn every 15 sek an Zombie and want to kill him 2sek later. here is that what I try but the error says that the CustomName in the CreaturSpawn event is null.

Here the Class:

Code:

public class Main extends JavaPlugin implements Listener {
    ArrayList<Player> canSeeEntitys = new ArrayList<Player>();

    @Override
    public void onEnable() {

        Bukkit.getPluginManager().registerEvents(this, this);

    }

    @EventHandler
    public void OnJoin(PlayerJoinEvent e) {
        final Player p = e.getPlayer();
        Bukkit.getScheduler().scheduleSyncRepeatingTask(this, new Runnable() {

            @Override
            public void run() {

                int x = p.getLocation().getBlockX();
                int y = p.getLocation().getBlockY();
                int z = p.getLocation().getBlockZ();
                double yaw = p.getLocation().getYaw();

                if (yaw >= -45 && yaw < 45) {
                    z = z - 2;
                } else if (yaw >= 45 && yaw < 135) {
                    x = x + 2;
                } else if (yaw >= 135 && yaw < 181 || yaw > 181 && yaw < -135) {
                    z = z + 2;
                } else if (yaw >= -135 && yaw < -45) {
                    x = x - 2;
                }
                y++;
                long l = 20;
                Location loc = new Location(p.getWorld(), x, y, z);
                Zombie zom = (Zombie) p.getWorld().spawnCreature(loc, CreatureType.ZOMBIE);
                zom.setCustomName(p.getName());
                zom.setHealth(1);
                zom.setCanPickupItems(false);

                p.sendMessage(p.getLocation().getYaw() + " ");
            }

        }, 0, 300);

    }

   
    @EventHandler
    public void mob(CreatureSpawnEvent e) {

        if (e.getEntity() instanceof Zombie) {

            Zombie zom = (Zombie) e.getEntity();
            if (zom.getCustomName() != null) {
                for (Player all : Bukkit.getOnlinePlayers()) {
                    if (zom.getCustomName().equalsIgnoreCase(all.getName())) {

                        Bukkit.getScheduler().scheduleAsyncDelayedTask(this, new Runnable() {

                            @Override
                            public void run() {

                                zom.setHealth(0);

                            }

                        }, 20 * 2);
                    }

                }
            }
        }

    }

}

 

@GamingChrisYT
What version of bukkit are you building against?

 

spigot-1.8.8-R0.1-SNAPSHOT-latest.jar

 

@GamingChrisYT
In your OnJoin i suggest using spawnEntity instead of spawnCreature.... that shouldn't make a huge difference. I also suggest when you're checking if zom.getCustomName != null you also && !zom.getCustomName().isEmpty()