java - 当 Bukkit 中一匹马死亡时停止 Bukkit 循环并记录

Question

今天我正在尝试制作一个插件，它可以生成一匹骷髅马，并且马周围有火焰粒子。我把那部分拿下来了，但是每当有人杀死骨马时，火粒子就会留在那里。有人请帮忙吗？

还有我的代码(2类):

package survivalcraft.FireHorse;
import java.util.logging.Logger;
import org.bukkit.plugin.java.JavaPlugin;
import org.bukkit.plugin.PluginDescriptionFile;
import org.bukkit.command.CommandSender;
import org.bukkit.command.Command;
import org.bukkit.entity.EntityType;
import org.bukkit.entity.Horse.Variant;
import org.bukkit.entity.Player;
import org.bukkit.entity.Horse;
import org.bukkit.inventory.HorseInventory;
import org.bukkit.inventory.ItemStack;
import org.bukkit.ChatColor;
import org.bukkit.Bukkit;
import org.bukkit.Material;

public class Main extends JavaPlugin{
public static Main plugin;
public final Logger logger = Logger.getLogger("Minecraft");

@Override
public void onDisable(){
    PluginDescriptionFile pdf = this.getDescription();
    this.logger.info(pdf.getName() + " version " + pdf.getVersion() + " has been disabled! Neigh! ;D");
}

@Override
public void onEnable(){
    PluginDescriptionFile pdf = this.getDescription();
    this.logger.info(pdf.getName() + " version " + pdf.getVersion() + " has been enabled! Neigh! ;D");
}

@Override
public boolean onCommand(CommandSender sender, Command cmd, String commandLabel, String[] args){
    Player player = (Player) sender;
    if(sender instanceof Player){
        if(player.hasPermission("firehorse.spawn")){
            if(commandLabel.equalsIgnoreCase("firehorse") || commandLabel.equalsIgnoreCase("fh")){
                if(args.length == 0){
                    Horse horse = (Horse) player.getWorld().spawnEntity(player.getLocation(), EntityType.HORSE);
                    HorseInventory horseinv = null;
                    ItemStack saddle = new ItemStack(Material.SADDLE);
                    horse.setVariant(Variant.SKELETON_HORSE);
                    horse.setCustomName(player.getDisplayName() + "'s Fire Horse");                     
                    horse.setTamed(true);
                    horseinv.setSaddle(saddle);
                    Bukkit.getScheduler().scheduleSyncRepeatingTask(this, new HorseTimer(horse), 0l, 5l);
                }else{
                    player.sendMessage(ChatColor.RED + "Usage: /firehorse");
                }
            }
        }else{
            player.sendMessage(ChatColor.RED + "You can't spawn a fire horse!");
        }
    }else{
        player.sendMessage(ChatColor.RED + "You must be a player in order to spawn a fire horse!");
    }   
    return false;
}   
}

二等:

package survivalcraft.FireHorse;

import org.bukkit.Effect;
import org.bukkit.entity.Horse;

public class HorseTimer implements Runnable{
private Horse horse;

public HorseTimer(Horse horse){
    this.horse = horse;
}

@Override
public void run(){
    horse.getWorld().playEffect(horse.getLocation(), Effect.MOBSPAWNER_FLAMES, 0);
}
}

Answer 1

第一:检查一匹马是否还活着，就像 @Momo 发布的那样，并由 @CrypticStorm 进行了小修正

第二:HorseTimer 类应该扩展 BukkitRunnable 而不是实现 Rumnable，这样它就可以自行取消请参阅http://wiki.bukkit.org/Scheduler_Programming#Self-Canceling_Example_2