打字猴:1.700451689e+09
1700451689
1700451690 @Override
1700451691
1700451692 public Integer call()throws Exception{
1700451693
1700451694 //跑步的成绩
1700451695
1700451696 int score=new Random().nextInt(25);
1700451697
1700451698 //等待发令枪响起
1700451699
1700451700 begin.await();
1700451701
1700451702 //跑步中……
1700451703
1700451704 TimeUnit.MILLISECONDS.sleep(score);
1700451705
1700451706 //跑步者已经跑完全程
1700451707
1700451708 end.countDown();
1700451709
1700451710 return score;
1700451711
1700451712 }
1700451713
1700451714 }
1700451715
1700451716 public static void main(String[]args)throws Exception{
1700451717
1700451718 //参加赛跑人数
1700451719
1700451720 int num=10;
1700451721
1700451722 //发令枪只响一次
1700451723
1700451724 CountDownLatch begin=new CountDownLatch(1);
1700451725
1700451726 //参与跑步有多个
1700451727
1700451728 CountDownLatch end=new CountDownLatch(num);
1700451729
1700451730 //每个跑步者一个跑道
1700451731
1700451732 ExecutorService es=Executors.newFixedThreadPool(num);
1700451733
1700451734 //记录比赛成绩
1700451735
1700451736 List<Future<Integer>>futures=new ArrayList<Future<Integer>>();
1700451737
1700451738 //跑步者就位,所有线程处于等待状态
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