Java Minecraft插件EventHandler？

Question

我在做一个服务器插件，可以在玩家死的时候踢他们。我已经解决了所有的问题，但我希望能够切换它。我看过使用布尔值，但当我将@EventHandler放在一个布尔值中时，它会对我大喊大叫，我认为我做得不对……所以我想问题是，有没有办法在执行"/kdoff“时，@EventHandler只有在执行"/kd”之后才会执行。我觉得你可以用onDisable()做一些事情，但老实说，我不完全确定它们是如何工作的。

package me.Cats.KickDead;

import org.bukkit.ChatColor;
import org.bukkit.command.Command;
import org.bukkit.command.CommandSender;
import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.entity.EntityDeathEvent;
import org.bukkit.plugin.java.JavaPlugin;

public class Main extends JavaPlugin
    implements Listener {

    @Override
    public void onEnable() { // on server start-up
        System.out.println("Death Kick is enabled");
        getServer().getPluginManager().registerEvents(this, this);
        
    }
    
    
    @Override
    public void onDisable() {
        
    }
    
    public boolean onCommand(CommandSender sender, Command cmd, String label, String[] args) { // enables command
        if (label.equalsIgnoreCase("kd")) {
            if (sender instanceof Player) { //player
                Player player = (Player) sender;
                if (player.hasPermission("kickdead.use")) {
                player.sendMessage(ChatColor.translateAlternateColorCodes('&', "&bPlayers will now be sent to the &8&lShadow Realm&b. &r(&0&aOn&r)")); // Yu-gi-oh Reference
                
                return true;
                }
                player.sendMessage(ChatColor.translateAlternateColorCodes('&', "&cYour deck lacks the power to send someone to the &8&lShadow Realm&r&b.")); // Yet another Yu-gi-oh reference

            }
            
        if(label.equalsIgnoreCase("kdoff")) {
            if(sender instanceof Player) {
                Player player = (Player) sender;
                if (player.hasPermission("kickdead.use")) {
                player.sendMessage(ChatColor.translateAlternateColorCodes('&', "&bPlayers will be allowed on the &a&lMoral Plane&r&b. &r(&0&4Off&r)")); // Yu-gi-oh Reference
                
                return false;
            }
                player.sendMessage(ChatColor.translateAlternateColorCodes('&', "&cYour deck lacks the power to allow people to walk this &a&lMoral Plane&r&b.")); 
        }
            
            
        else { //console
            sender.sendMessage("Currently only works if ran by a player. I'm a bit lazy..."); 
            return true;
                }
            }
        }
        return false;
    }
    
    @EventHandler // if a player dies they're kicked
    public void onDeath(EntityDeathEvent event) {
        Player player = (Player)event.getEntity();
        player.kickPlayer(ChatColor.RED + "" + ChatColor.BOLD + "You Died"); 
    
    }
    
}

Answer 1

我认为最简单的方法就是在某个地方存储一个布尔值，以确定是否启用了kick on death。/kd和/kdoff命令可以设置它，只要有人死了，你只要检查它是否被启用，就可以决定是否应该踢他们。

OnDisabled是当插件被禁用时调用的事件，通常是指服务器关闭时(尽管也有其他时间！)。您不希望完全禁用该插件，因为那样您将无法捕获/kd命令。

public class Main extends JavaPlugin
    implements Listener {
    public static boolean kickOnDeath = true;

    @Override
    public void onEnable() { // on server start-up
        if (kickOnDeath) {
            System.out.println("Death Kick is enabled");
        }
        getServer().getPluginManager().registerEvents(this, this);
        
    }
    
    
    @Override
    public void onDisable() {
        
    }
    
    public boolean onCommand(CommandSender sender, Command cmd, String label, String[] args) { // enables command
        if (label.equalsIgnoreCase("kd")) {
            if (sender instanceof Player) { //player
                Player player = (Player) sender;
                if (player.hasPermission("kickdead.use")) {
                    player.sendMessage(ChatColor.translateAlternateColorCodes('&', "&bPlayers will now be sent to the &8&lShadow Realm&b. &r(&0&aOn&r)")); // Yu-gi-oh Reference
                    kickOnDeath = true;
                    return true;
                }
                player.sendMessage(ChatColor.translateAlternateColorCodes('&', "&cYour deck lacks the power to send someone to the &8&lShadow Realm&r&b.")); // Yet another Yu-gi-oh reference
            } else { //console
                sender.sendMessage("Currently only works if ran by a player. I'm a bit lazy..."); 
                return true;
            }
        } else if (label.equalsIgnoreCase("kdoff")) {
            if (sender instanceof Player) {
                Player player = (Player) sender;
                if (player.hasPermission("kickdead.use")) {
                    player.sendMessage(ChatColor.translateAlternateColorCodes('&', "&bPlayers will be allowed on the &a&lMoral Plane&r&b. &r(&0&4Off&r)")); // Yu-gi-oh Reference
                    kickOnDeath = false;
                    return true;
                }
                player.sendMessage(ChatColor.translateAlternateColorCodes('&', "&cYour deck lacks the power to allow people to walk this &a&lMoral Plane&r&b."));
            } else { //console
                sender.sendMessage("Currently only works if ran by a player. I'm a bit lazy..."); 
                return true;
            }
        }
        return false;
    }
    
    @EventHandler // if a player dies they're kicked
    public void onDeath(EntityDeathEvent event) {
        if (kickOnDeath) {
            Player player = (Player)event.getEntity();
            player.kickPlayer(ChatColor.RED + "" + ChatColor.BOLD + "You Died"); 
        }
    }
    
}

这个实现有一个全局标志，只启用和禁用，但我相信你可以让它持久化或特定于玩家。

Answer 2

如果您想要全局启用/禁用kicking on death事件，则可以使用布尔值。

你只需要把它作为一个字段添加到类中：

public class Main extends JavaPlugin
    implements Listener {

    private boolean enabled = true; // Added this line.

    @Override
    public void onEnable() { // on server start-up
        System.out.println("Death Kick is enabled");
        getServer().getPluginManager().registerEvents(this, this);
        
    }

    ...

现在，您可以在调用命令时设置enabled字段的值：

if (label.equalsIgnoreCase("kd")) {
    if (sender instanceof Player) { //player
      Player player = (Player) sender;
      if (player.hasPermission("kickdead.use")) {
        player.sendMessage(ChatColor.translateAlternateColorCodes('&', "&bPlayers will now be sent to the &8&lShadow Realm&b. &r(&0&aOn&r)")); // Yu-gi-oh Reference
        
        enabled = true; // Added this line to set the enable flag.

        return true;
      }
      player.sendMessage(ChatColor.translateAlternateColorCodes('&', "&cYour deck lacks the power to send someone to the &8&lShadow Realm&r&b.")); // Yet another Yu-gi-oh reference
    }
    
else if(label.equalsIgnoreCase("kdoff")) {
    if(sender instanceof Player) {
        Player player = (Player) sender;
      if (player.hasPermission("kickdead.use")) {
          player.sendMessage(ChatColor.translateAlternateColorCodes('&', "&bPlayers will be allowed on the &a&lMoral Plane&r&b. &r(&0&4Off&r)")); // Yu-gi-oh Reference
          
          enabled = false; // Added this line to set the enable flag.

          return false;
      }
        player.sendMessage(ChatColor.translateAlternateColorCodes('&', "&cYour deck lacks the power to allow people to walk this &a&lMoral Plane&r&b.")); 
}

现在，您可以检查onDeath侦听器中enabled字段的值，并执行相应的操作：

@EventHandler
public void onDeath(EntityDeathEvent event) {
   if (enabled) {
       // Kill player.
   }
}