import cn.nukkit.event.server.ServerCommandEvent; //导入依赖的package包/类
@Override
public void onEnable() {
    if (getConfig().getAll().isEmpty()) {
        try {
            getServer().getPluginManager().registerEvent(ServerCommandEvent.class, this, EventPriority.HIGHEST,
                    new MethodEventExecutor(this.getClass().getDeclaredMethod("chooseLanguage", ServerCommandEvent.class)), this);
        } catch (NoSuchMethodException e) {
            e.printStackTrace();
        }

        this.getLogger().notice("欢迎使用本经济插件, 请选择语言: (输入 3 次错误自动选择中文)");
        this.getLogger().notice(
                "Hello. Please choose a language: (It will choose Chinese Simplified automatically when inputting error 3 times)");
        this.getLogger().info(TextFormat.AQUA + "chs: 简体中文");
        this.getLogger().info(TextFormat.AQUA + "cht: 繁體中文");
        this.getLogger().info(TextFormat.AQUA + "eng: English\n");
        chooseLanguage(new ServerCommandEvent(null, ""));
    } else {
        init();
    }

}
 

import cn.nukkit.event.server.ServerCommandEvent; //导入依赖的package包/类
@EventHandler(priority = EventPriority.HIGHEST)
public void onServerCommandEvent(ServerCommandEvent event){
	String command = event.getCommand();
	if(command.startsWith(".")){
		event.setCancelled();
		Server.getInstance().broadcastMessage(PraterConsole.getFormat().replace("{%0}", command.substring(1, command.length())));
	}
}
 

import cn.nukkit.event.server.ServerCommandEvent; //导入依赖的package包/类
@SuppressWarnings("WeakerAccess")
public void chooseLanguage(ServerCommandEvent event) {
    if (getConfig().getAll().isEmpty()) {
        event.setCancelled();

        String language;

        if (errorTimes == 3) {
            language = "chs";
            this.getLogger().info(TextFormat.GREEN + "输入3次无效. 将使用默认设置");
            this.getLogger().notice("已使用 [简体中文] 作为默认语言.");
        } else {
            switch (event.getCommand()) {
                case "":
                    return;
                case "chs":
                    this.getLogger().notice("已使用 [简体中文] 作为默认语言.");
                    language = "chs";
                    break;
                case "eng":
                    this.getLogger().notice("Have chosen [English] as the default language.");
                    language = "eng";
                    break;
                case "cht":
                    this.getLogger().notice("已使用 [繁體中文] 作為默認語言.");
                    language = "cht";
                    break;
                default:
                    this.getLogger().notice("欢迎使用本经济插件, 请选择语言: (输入 3 次错误自动选择中文)");
                    this.getLogger().notice(
                            "Hello. Please choose a language: (It will choose Chinese Simplified automatically when inputting error 3 times)");
                    this.getLogger().info(TextFormat.AQUA + "chs: 简体中文");
                    this.getLogger().info(TextFormat.AQUA + "cht: 繁體中文");
                    this.getLogger().info(TextFormat.AQUA + "eng: English\n");
                    errorTimes++;
                    return;
            }
        }

        saveResource("Language_" + language + ".properties", "Language.properties", true);
        saveResource("Config_" + language + ".yml", "Config.yml", true);
        saveResource("Commands_" + language + ".yml", "Commands.yml", true);

        init();
    }
}
 

import cn.nukkit.event.server.ServerCommandEvent; //导入依赖的package包/类
@EventHandler(priority = EventPriority.HIGHEST)
public void onServerCommandEvent(ServerCommandEvent event){
	if(event.getCommand().toLowerCase().startsWith("save-all")){
		this.saveAll((CommandSender) event.getSender());
	}
}