CraftFirework.java 文件源码

@Override
public void setFireworkMeta(FireworkMeta meta) {
    item.setItemMeta(meta);

    // Copied from EntityFireworks constructor, update firework lifetime/power
    getHandle().lifetime = 10 * (1 + meta.getPower()) + random.nextInt(6) + random.nextInt(7);

    getHandle().getDataWatcher().setObjectWatched(FIREWORK_ITEM_INDEX); // Update
}