如何在Java中使用Executor执行返回不同对象的方法

import java.util.concurrent.Callable;

public class MyTask implements Callable<String> {
    @Override
    public String call() throws Exception {
        // 执行业务逻辑
        return "Hello World";
    }
}

import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

public class Main {
    public static void main(String[] args) {
        // 创建一个固定大小的线程池
        ExecutorService executorService = Executors.newFixedThreadPool(5);
        
        // 提交任务并获取Future对象
        MyTask task = new MyTask();
        Future<String> future = executorService.submit(task);
        
        try {
            // 获取任务执行结果
            String result = future.get();
            System.out.println(result);
        } catch (InterruptedException | ExecutionException e) {
            e.printStackTrace();
        }
        
        // 关闭线程池
        executorService.shutdown();
    }
}