尝试 运行 我的服务器上的脚本时发生错误

Question

我正在尝试开发一个派系插件，运行每个命令都有一个脚本 运行。所以我有一个 CommandListner 脚本，它由 onEnable 中的 Main.java 激活，监听器使用参数来确定哪个命令是 运行 和 运行 执行该命令的脚本。

我用的API可以在这里找到：https://www.spigotmc.org/wiki/buildtools/ （这是1.8版本）

我尝试了很多方法来解决这个问题，我记得错误是 worse/bigger，但我已经解决了一部分。但我似乎无法找到解决方案。

package net.evolvedmc.evolvedfactions.commands;

import java.awt.Color;

import org.bukkit.command.Command;
import org.bukkit.command.CommandExecutor;
import org.bukkit.command.CommandSender;
import org.bukkit.entity.Player;

import net.evolvedmc.evolvedfactions.Main;

public class CommandListner implements CommandExecutor {
    
    private Main plugin;
    
    public CommandListner(Main plugin) {
        
        //Listens for the /f command
        this.plugin = plugin;
        String STRBaseCMD = "f";
        System.out.println("[EvolvedFactions] Listning for command '" + STRBaseCMD + "' with executor " + this);
        plugin.getCommand(STRBaseCMD).setExecutor(this);
        
    }
    
    @Override
    public boolean onCommand(CommandSender sender, Command cmd, String label, String[] args) {
        
        //Defines our player
        Player player = (Player) sender;
        
        //checks if the player has given enough arguments
        if(args.length == 0) {
            player.sendMessage(Color.RED + "Correct usage: /f <arg>");
            return false;
        }
        
        //checks if our argument is help
        if(args[0].equalsIgnoreCase("help")) {
            
            //checks if the player has the permission to execute this command
            if(player.hasPermission("evolvedfactions.default.help")) {
                
                //loads the script which executes the command
                player.sendMessage("BomPom");
                new HelpCommand(this, player);
                return true;
                
            } else {
                player.sendMessage("You do not have permission to execute this command.");
            }
            
            
        }
        
        return false;
    }

}

[23:59:56 INFO]: [EvolvedFactions] Enabling EvolvedFactions v0.1
[23:59:56 INFO]: [EvolvedFactions] Activating CommandListner script
[23:59:56 INFO]: [EvolvedFactions] Listning for command 'f' with executor net.evolvedmc.evolvedfactions.commands.CommandListner@6a47bd0b
[23:59:56 ERROR]: Error occurred while enabling EvolvedFactions v0.1 (Is it up to date?)
java.lang.NullPointerException
        at net.evolvedmc.evolvedfactions.commands.CommandListner.<init>(CommandListner.java:22) ~[?:?]
        at net.evolvedmc.evolvedfactions.Main.onEnable(Main.java:14) ~[?:?]
        at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:321) ~[server.jar:git-Spigot-c3c767f-33d5de3]
        at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:335) [server.jar:git-Spigot-c3c767f-33d5de3]
        at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:405) [server.jar:git-Spigot-c3c767f-33d5de3]
        at org.bukkit.craftbukkit.v1_8_R1.CraftServer.loadPlugin(CraftServer.java:356) [server.jar:git-Spigot-c3c767f-33d5de3]
        at org.bukkit.craftbukkit.v1_8_R1.CraftServer.enablePlugins(CraftServer.java:316) [server.jar:git-Spigot-c3c767f-33d5de3]
        at net.minecraft.server.v1_8_R1.MinecraftServer.q(MinecraftServer.java:402) [server.jar:git-Spigot-c3c767f-33d5de3]
        at net.minecraft.server.v1_8_R1.MinecraftServer.k(MinecraftServer.java:370) [server.jar:git-Spigot-c3c767f-33d5de3]
        at net.minecraft.server.v1_8_R1.MinecraftServer.a(MinecraftServer.java:325) [server.jar:git-Spigot-c3c767f-33d5de3]
        at net.minecraft.server.v1_8_R1.DedicatedServer.init(DedicatedServer.java:211) [server.jar:git-Spigot-c3c767f-33d5de3]
        at net.minecraft.server.v1_8_R1.MinecraftServer.run(MinecraftServer.java:505) [server.jar:git-Spigot-c3c767f-33d5de3]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_221]

Answer 1

您忘记将命令添加到您的 plugin.yml（这导致 getCommand("f") 到 return null）：

main: ...
version: ...
name: ...

commands:
  f:

请阅读the documentation。