如何在AKKA java中创建多个角色并保存它们的列表？

public class MyRole {
    private String name;
    
    public MyRole(String name) {
        this.name = name;
    }
    
    public void doSomething() {
        // 角色的行为逻辑
    }
}

import akka.actor.ActorRef;
import akka.actor.ActorSystem;
import akka.actor.Props;
import java.util.ArrayList;
import java.util.List;

public class RoleManager {
    private List<ActorRef> roles;
    
    public RoleManager() {
        roles = new ArrayList<>();
    }
    
    public void createRole(String name) {
        ActorSystem system = ActorSystem.create("MySystem");
        ActorRef role = system.actorOf(Props.create(MyRole.class, name));
        roles.add(role);
    }
    
    public List<ActorRef> getRoles() {
        return roles;
    }
}

public class Main {
    public static void main(String[] args) {
        RoleManager roleManager = new RoleManager();
        
        roleManager.createRole("Role1");
        roleManager.createRole("Role2");
        roleManager.createRole("Role3");
        
        List<ActorRef> roles = roleManager.getRoles();
        
        // 对角色列表进行操作
        for (ActorRef role : roles) {
            role.tell("doSomething", ActorRef.noSender());
        }
    }
}