如何在JDA中获取我不一致的机器人的所有服务器名称

import net.dv8tion.jda.api.JDABuilder;
import net.dv8tion.jda.api.events.guild.GuildJoinEvent;
import net.dv8tion.jda.api.events.guild.GuildLeaveEvent;
import net.dv8tion.jda.api.events.guild.member.GuildMemberJoinEvent;
import net.dv8tion.jda.api.hooks.ListenerAdapter;

import javax.security.auth.login.LoginException;
import java.util.HashSet;
import java.util.Set;

public class Bot extends ListenerAdapter {

    private Set<String> serverNames = new HashSet<>();

    public static void main(String[] args) throws LoginException {
        // 创建JDA实例
        JDABuilder builder = JDABuilder.createDefault("YOUR_BOT_TOKEN");
        
        // 设置事件监听器
        builder.addEventListeners(new Bot());
        
        // 启动机器人
        builder.build();
    }

    @Override
    public void onGuildJoin(GuildJoinEvent event) {
        // 获取加入的服务器名称并存储
        String serverName = event.getGuild().getName();
        serverNames.add(serverName);
    }

    @Override
    public void onGuildLeave(GuildLeaveEvent event) {
        // 获取离开的服务器名称并移除
        String serverName = event.getGuild().getName();
        serverNames.remove(serverName);
    }
}