java多线程并发executorservice(任务调度)类

 public void beepForAnHour() {
  final Runnable beeper = new Runnable() {
   public void run() {
    System.out.println("beep");
   }
  };
  final ScheduledFuture<?> beeperHandle = scheduler.scheduleAtFixedRate(
    beeper, 2, 10, TimeUnit.SECONDS);
  scheduler.schedule(new Runnable() {
   public void run() {
    beeperHandle.cancel(true);
    scheduler.shutdown();
   }
  }, 60, TimeUnit.SECONDS);