在 Bukkit 中为命令使用多个类？

【问题标题】：Using multiple classes for commands in Bukkit?在 Bukkit 中为命令使用多个类？
【发布时间】：2017-03-27 12:26:54
【问题描述】：

最近我启动了一个 Bukkit 插件，但我在使用两个类（main 和 CommandExecutor）时遇到了麻烦。我已经尝试了所有方法，但是当我加载我的插件时，它会在帖子末尾抛出一个错误。

主要（称为ekits.java）：

package me.mucapapipa.ekits;

import org.bukkit.Bukkit;
import org.bukkit.ChatColor;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.player.PlayerJoinEvent;
import org.bukkit.plugin.java.JavaPlugin;

public class ekits extends JavaPlugin implements Listener {


@Override
public void onEnable() {
    System.out.println("Main plugin enabled");
    getCommand("pvp").setExecutor(new NormalPlayer(this));
    getServer().getPluginManager().registerEvents(this, this);
}
@Override
public void onDisable() {
    System.out.println("Main plugin disabled");
}


}

CommandExecutor（称为 NormalPlayer）：

package me.mucapapipa.ekits;

import org.bukkit.ChatColor;
import org.bukkit.Material;
import org.bukkit.command.Command;
import org.bukkit.command.CommandExecutor;
import org.bukkit.command.CommandSender;
import org.bukkit.entity.Player;
import org.bukkit.inventory.ItemStack;
import org.bukkit.plugin.java.JavaPlugin;

public class NormalPlayer extends JavaPlugin implements CommandExecutor {

@SuppressWarnings("unused")
private ekits core;
public NormalPlayer(ekits core) {
        this.core = core;
}

private String kit;

public boolean onCommand(CommandSender sender, Command cmd, String CommandLabel, String[] args) {

    if (sender instanceof Player) {
        Player player = (Player) sender;
        if (cmd.getName().equalsIgnoreCase("pvp")) {
            kit = "PvP";
            player.getInventory().clear();
            player.getInventory().addItem(new ItemStack(Material.DIAMOND_SWORD));
            player.getInventory().addItem(new ItemStack(Material.MUSHROOM_SOUP));
            player.getInventory().addItem(new ItemStack(Material.MUSHROOM_SOUP));
            player.getInventory().addItem(new ItemStack(Material.MUSHROOM_SOUP));
            player.getInventory().addItem(new ItemStack(Material.MUSHROOM_SOUP));
            player.getInventory().addItem(new ItemStack(Material.MUSHROOM_SOUP));
            player.getInventory().addItem(new ItemStack(Material.MUSHROOM_SOUP));
            player.getInventory().addItem(new ItemStack(Material.MUSHROOM_SOUP));
            player.getInventory().addItem(new ItemStack(Material.MUSHROOM_SOUP));
            player.getInventory().addItem(new ItemStack(Material.MUSHROOM_SOUP));
            player.getInventory().addItem(new ItemStack(Material.MUSHROOM_SOUP));
            player.getInventory().addItem(new ItemStack(Material.MUSHROOM_SOUP));
            player.getInventory().addItem(new ItemStack(Material.MUSHROOM_SOUP));
            player.getInventory().addItem(new ItemStack(Material.MUSHROOM_SOUP));
            player.getInventory().addItem(new ItemStack(Material.MUSHROOM_SOUP));
            player.getInventory().addItem(new ItemStack(Material.MUSHROOM_SOUP));
            player.getInventory().addItem(new ItemStack(Material.MUSHROOM_SOUP));
            player.getInventory().addItem(new ItemStack(Material.MUSHROOM_SOUP));
            player.getInventory().addItem(new ItemStack(Material.MUSHROOM_SOUP));
            player.getInventory().addItem(new ItemStack(Material.MUSHROOM_SOUP));
            player.getInventory().addItem(new ItemStack(Material.MUSHROOM_SOUP));
            player.getInventory().addItem(new ItemStack(Material.MUSHROOM_SOUP));
            player.getInventory().addItem(new ItemStack(Material.MUSHROOM_SOUP));
            player.getInventory().addItem(new ItemStack(Material.MUSHROOM_SOUP));
            player.getInventory().addItem(new ItemStack(Material.MUSHROOM_SOUP));
            player.getInventory().addItem(new ItemStack(Material.MUSHROOM_SOUP));
            player.getInventory().addItem(new ItemStack(Material.MUSHROOM_SOUP));
            player.getInventory().addItem(new ItemStack(Material.MUSHROOM_SOUP));
            player.getInventory().addItem(new ItemStack(Material.MUSHROOM_SOUP));
            player.getInventory().addItem(new ItemStack(Material.MUSHROOM_SOUP));
            player.getInventory().addItem(new ItemStack(Material.MUSHROOM_SOUP));
            player.getInventory().addItem(new ItemStack(Material.MUSHROOM_SOUP));
            player.getInventory().addItem(new ItemStack(Material.MUSHROOM_SOUP));
            player.getInventory().addItem(new ItemStack(Material.MUSHROOM_SOUP));
            player.getInventory().addItem(new ItemStack(Material.MUSHROOM_SOUP));
            player.getInventory().addItem(new ItemStack(Material.MUSHROOM_SOUP));
            /* We then set the armor */
            player.getInventory().setBoots(new ItemStack(Material.IRON_BOOTS));
            player.getInventory().setHelmet(new ItemStack(Material.IRON_HELMET));
            player.getInventory().setLeggings(new ItemStack(Material.IRON_LEGGINGS));
            player.getInventory().setChestplate(new ItemStack(Material.IRON_CHESTPLATE));

            player.sendMessage(ChatColor.GRAY + "~ " + ChatColor.AQUA + "Kit: " + kit);
        }
        else {
            sender.sendMessage("The console should not play. It would be so OP.");
        }
    }

    return true; }
}

plugin.yml:

name: EKits
author: Mucapapipa
main: me.mucapapipa.ekits.ekits
version: 1.0
description: The server's main plugin.

commands:
  pvp:
    usage: /<command>
    aliases: [kitpvp]
    description: Uses the kit PvP.

错误：

[19:19:01 ERROR]：启用 EKits v1.0 时出错（它是最新的吗？） java.lang.IllegalArgumentException：插件已经初始化！ 在 org.bukkit.plugin.java.PluginClassLoader.initialize(PluginClassLoader.java:98) ~[craftbukkit.jar:git-Bukkit-7019900] 在 org.bukkit.plugin.java.JavaPlugin.(JavaPlugin.java:66) ~[craftbukkit.jar:git-Bukkit-7019900] 在 me.mucapapipa.ekits.NormalPlayer.(NormalPlayer.java:16) ~[?:?] 在 me.mucapapipa.ekits.ekits.onEnable(ekits.java:16) ~[?:?] 在 org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:321) ~[craftbukkit.jar:git-Bukkit-7019900] 在 org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:327) [craftbukkit.jar:git-Bukkit-7019900] 在 org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:404) [craftbukkit.jar:git-Bukkit-7019900] 在 org.bukkit.craftbukkit.v1_8_R1.CraftServer.loadPlugin(CraftServer.java:341) [craftbukkit.jar:git-Bukkit-7019900] 在 org.bukkit.craftbukkit.v1_8_R1.CraftServer.enablePlugins(CraftServer.java:313) [craftbukkit.jar:git-Bukkit-7019900] 在 net.minecraft.server.v1_8_R1.MinecraftServer.q(MinecraftServer.java:394) [craftbukkit.jar:git-Bukkit-7019900] 在 net.minecraft.server.v1_8_R1.MinecraftServer.k(MinecraftServer.java:362) [craftbukkit.jar:git-Bukkit-7019900] 在 net.minecraft.server.v1_8_R1.MinecraftServer.a(MinecraftServer.java:317) [craftbukkit.jar:git-Bukkit-7019900] 在 net.minecraft.server.v1_8_R1.DedicatedServer.init(DedicatedServer.java:190) [craftbukkit.jar:git-Bukkit-7019900] 在 net.minecraft.server.v1_8_R1.MinecraftServer.run(MinecraftServer.java:484) [craftbukkit.jar:git-Bukkit-7019900] 在 java.lang.Thread.run(Unknown Source) [?:1.8.0_101] 引起：java.lang.IllegalStateException：初始初始化 在 org.bukkit.plugin.java.PluginClassLoader.initialize(PluginClassLoader.java:101) ~[craftbukkit.jar:git-Bukkit-7019900] 在 org.bukkit.plugin.java.JavaPlugin.(JavaPlugin.java:66) ~[craftbukkit.jar:git-Bukkit-7019900] 在 me.mucapapipa.ekits.ekits.(ekits.java:10) ~[?:?] 在 sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[?:1.8.0_101] 在 sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source) ~[?:1.8.0_101] 在 sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source) ~[?:1.8.0_101] 在 java.lang.reflect.Constructor.newInstance(Unknown Source) ~[?:1.8.0_101] 在 java.lang.Class.newInstance(Unknown Source) ~[?:1.8.0_101] 在 org.bukkit.plugin.java.PluginClassLoader.(PluginClassLoader.java:52) ~[craftbukkit.jar:git-Bukkit-7019900] 在 org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:129) ~[craftbukkit.jar:git-Bukkit-7019900] 在 org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:328) ~[craftbukkit.jar:git-Bukkit-7019900] 在 org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:251) ~[craftbukkit.jar:git-Bukkit-7019900] 在 org.bukkit.craftbukkit.v1_8_R1.CraftServer.loadPlugins(CraftServer.java:288) ~[craftbukkit.jar:git-Bukkit-7019900] 在 org.bukkit.craftbukkit.v1_8_R1.CraftServer.(CraftServer.java:250) ~[craftbukkit.jar:git-Bukkit-7019900] 在 net.minecraft.server.v1_8_R1.PlayerList.(PlayerList.java:69) ~[craftbukkit.jar:git-Bukkit-7019900] 在 net.minecraft.server.v1_8_R1.DedicatedPlayerList.(SourceFile:14) ~[craftbukkit.jar:git-Bukkit-7019900] 在 net.minecraft.server.v1_8_R1.DedicatedServer.init(DedicatedServer.java:133) ~[craftbukkit.jar:git-Bukkit-7019900] ... 2 更多

【问题讨论】：

    标签： java minecraft bukkit


    【解决方案1】：

    public class NormalPlayer extends JavaPlugin implements CommandExecutor

    为什么你的命令执行器扩展了主插件类？这就是导致双重初始化的原因，删除该超类可能会修复代码。

    【讨论】：

    • 哇！谢谢，我什至没有注意到有一个扩展。谢谢！
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