Java多线程-有返回值的线程

1、package cn.thread;

import java.util.concurrent.Callable;

import java.util.concurrent.ExecutionException;

import java.util.concurrent.ExecutorService;

import java.util.concurrent.Executors;

import java.util.concurrent.Future;

public class CallableFutureTest {

    public static void main(String[] args) throws ExecutionException, InterruptedException {

        CallableFutureTest test = new CallableFutureTest();

        // 创建一个线程池

        ExecutorService pool = Executors.newFixedThreadPool(2);

        // 创建两个有返回值的任务

        Callable c1 = test.new MyCallable("A");

        Callable c2 = test.new MyCallable("B");

        // 执行任务并获取Future对象

        Future f1 = pool.submit(c1);

        Future f2 = pool.submit(c2);

        // 从Future对象上获取任务的返回值，并输出到控制台

        System.out.println(">>>" + f1.get().toString());

        System.out.println(">>>" + f2.get().toString());

        // 关闭线程池

        pool.shutdown();

    }

    class MyCallable implements Callable {

        private String oid;

        MyCallable(String oid) {

            this.oid = oid;

        }

        public Object call() throws Exception {

            return oid + "任务返回的内容";

        }

    }

}

2、>>>A任务返回的内容

>>>B任务返回的内容