如何从返回User的函数返回Future<User>？

import java.util.concurrent.CompletableFuture;

public class User {
    private String name;
    
    public User(String name) {
        this.name = name;
    }
    
    public String getName() {
        return name;
    }
}

public class UserService {
    public CompletableFuture<User> getUser() {
        CompletableFuture<User> future = new CompletableFuture<>();
        
        // 模拟异步操作，比如从数据库中获取用户信息
        new Thread(() -> {
            try {
                // 模拟耗时操作
                Thread.sleep(1000);
                
                // 创建User对象
                User user = new User("John");
                
                // 完成Future并返回结果
                future.complete(user);
            } catch (InterruptedException e) {
                // 异常处理
                future.completeExceptionally(e);
            }
        }).start();
        
        return future;
    }
}

public class Main {
    public static void main(String[] args) {
        UserService userService = new UserService();
        
        CompletableFuture<User> future = userService.getUser();
        
        future.thenApply(user -> {
            System.out.println("User name: " + user.getName());
            return null;
        });
    }
}