ScheduledThreadPoolExecutor周期性执行线程任务scheduleAtFixedRate

ScheduledThreadPoolExecutor mScheduledThreadPoolExecutor = new ScheduledThreadPoolExecutor(1);        mScheduledThreadPoolExecutor.scheduleAtFixedRate(new Runnable() {            @Override            public void run() {                System.out.println("线程id:" + Thread.currentThread().getId() + "\t" + System.currentTimeMillis());            }        }, 0, 3, TimeUnit.SECONDS);        new Thread(new Runnable() {            @Override            public void run() {                try {                    TimeUnit.SECONDS.sleep(12);                } catch (InterruptedException e) {                    e.printStackTrace();                }                System.out.println("关闭ScheduledThreadPoolExecutor");                mScheduledThreadPoolExecutor.shutdown();            }        }).start();

ScheduledThreadPoolExecutor每隔3秒周期性的在线程中打印当前时间。同时另起一个线程，12秒后关闭ScheduledThreadPoolExecutor。

输出：

06-19 15:55:41.469 27469-27499/zhangphil.test I/System.out: 线程id:12150	152939494146906-19 15:55:44.467 27469-27499/zhangphil.test I/System.out: 线程id:12150	152939494446706-19 15:55:47.467 27469-27499/zhangphil.test I/System.out: 线程id:12150	152939494746706-19 15:55:50.468 27469-27499/zhangphil.test I/System.out: 线程id:12150	152939495046706-19 15:55:53.466 27469-27499/zhangphil.test I/System.out: 线程id:12150	152939495346606-19 15:55:53.468 27469-27500/zhangphil.test I/System.out: 关闭ScheduledThreadPoolExecutor