多线程执行任务等待所有任务执行完毕

来源：互联网发布：java工程师薪资待遇编辑：程序博客网时间：2024/04/30 01:30

@Test    public void testMultiThread(){        try {            final CountDownLatch countDownLatch = new CountDownLatch(2);//计数器            ExecutorService executorService = Executors.newCachedThreadPool();            Future<Boolean> work1 =  executorService.submit(new Callable<Boolean>() {                @Override                public Boolean call() throws Exception {                    System.out.println("线程1开始执行..........");                    Thread.sleep(5000);                    System.out.println("线程1执行完了............");                    countDownLatch.countDown();                    return true;                }            });            Future<Boolean> work2 = executorService.submit(new Callable<Boolean>() {                @Override                public Boolean call() throws Exception {                    System.out.println("线程2开始执行..........");                    Thread.sleep(5000);                    System.out.println("线程2执行完了............");                    countDownLatch.countDown();                    return true;                }            });            Boolean work1Flag =  work1.get();//线程1返回值            Boolean work2Flag = work2.get();//线程2返回值            System.out.println("运行结果：线程1=" + work1Flag + "线程2=" + work2Flag);            countDownLatch.await();            System.out.println("执行结束");        } catch (InterruptedException e) {            e.printStackTrace();        } catch (ExecutionException e) {            e.printStackTrace();        }    }

执行结果如下：

线程1开始执行..........
线程2开始执行..........
线程2执行完了............
线程1执行完了............
运行结果：线程1=true线程2=true
执行结束

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