import org.bukkit.entity.TippedArrow; //导入依赖的package包/类
@EventHandler
public void onShootBow(EntityShootBowEvent e){
	if (e.isCancelled() || !(e.getEntity() instanceof Player)){
		return;
	}
	
	Player p = (Player) e.getEntity();		
	Entity proj = e.getProjectile();
	List<String> Pots = RPConfig.getStringList("server-protection.deny-potions");
	
	if (proj != null && (proj instanceof TippedArrow)){
		TippedArrow arr = (TippedArrow) proj;
		if (Pots.contains(arr.getBasePotionData().getType().name())){
			RPLang.sendMessage(p, "playerlistener.denypotion");
			e.setCancelled(true);
		}
	}
}
 

import org.bukkit.entity.TippedArrow; //导入依赖的package包/类
@Nullable
@Override
protected PotionEffect[] get(Event e) {
	Entity ent = entity.getSingle(e);
	if (ent == null) {
		return null;
	}
	if (ent instanceof ThrownPotion) {
		return ((ThrownPotion) ent).getEffects().stream().toArray(PotionEffect[]::new);
	} else if (ent instanceof TippedArrow) {
		return ((TippedArrow) ent).getCustomEffects().stream().toArray(PotionEffect[]::new);
	}
	return null;
}
 

import org.bukkit.entity.TippedArrow; //导入依赖的package包/类
public static Collection<PotionEffect> effects(TippedArrow arrow) {
    return effects(arrow.getBasePotionData(), arrow.getCustomEffects());
}
 

import org.bukkit.entity.TippedArrow; //导入依赖的package包/类
@Override
public void change(Event e, Object[] delta, @NotNull Changer.ChangeMode mode) {
	Entity ent = entity.getSingle(e);
	if (ent == null) {
		return;
	}
	if (PotionUtils.isEntityThrownPotion(ent)) {
		ItemStack item = ((ThrownPotion) ent).getItem();
		PotionMeta potionMeta = ((PotionMeta) ((ThrownPotion) ent).getItem().getItemMeta());
		switch (mode) {
			case ADD:
				Arrays.asList((PotionEffect[]) delta).forEach(eff -> potionMeta.addCustomEffect(eff, true));
				break;
			case SET:
				potionMeta.clearCustomEffects();
				Arrays.asList((PotionEffect[]) delta).forEach(eff -> potionMeta.addCustomEffect(eff, true));
				break;
			case REMOVE:
				potionMeta.removeCustomEffect((PotionEffectType) delta[0]);
				break;
			case DELETE:
				potionMeta.clearCustomEffects();
				break;
		}
		item.setItemMeta(potionMeta);
		((ThrownPotion) ent).setItem(item);
	} else if (ent.getType() == EntityType.TIPPED_ARROW) {
		TippedArrow tippedArrow = (TippedArrow) ent;
		switch (mode) {
			case ADD:
				Arrays.asList(((PotionEffect[]) delta)).forEach(eff -> tippedArrow.addCustomEffect(eff, true));
				break;
			case SET:
				tippedArrow.clearCustomEffects();
				Arrays.asList(((PotionEffect[]) delta)).forEach(eff -> tippedArrow.addCustomEffect(eff, true));
				break;
			case REMOVE:
				tippedArrow.removeCustomEffect((PotionEffectType) delta[0]);
				break;
			case DELETE:
				tippedArrow.clearCustomEffects();
				break;
		}
	}
}