BlockPlace.java 文件源码

@EventHandler
public void onBlockPlace(BlockPlaceEvent event) {

    if (event.getItemInHand().getType() != Material.MOB_SPAWNER)
        return;

    ItemStack is = event.getItemInHand();
    if (!is.hasItemMeta())
        return;

    ItemMeta im = is.getItemMeta();

    if (!im.hasLore())
        return;

    String lore = im.getLore().toString();

    if (!lore.contains("Spawner:"))
        return;

    EntityType entity = getEntity(lore);

    if (entity == EntityType.AREA_EFFECT_CLOUD) {
        event.setCancelled(true);
        return;
    }

    setSpawner(event.getBlock(), entity);
}