Timer和ScheduledThreadPoolExecutor的区别

参考：http://blog.youkuaiyun.com/masterseventeen/article/details/3443114


ScheduledThreadPoolExecutor scheduler = new ScheduledThreadPoolExecutor(10);


以固定速率执行周期任务
scheduleAtFixedRate(task, delayTime, periodTime, TimeUnit.SECONDS);


执行启动延时任务
schedule(task, delayTime, TimeUnit.SECONDS);


取消定时任务   任务开始前
cancel(false);


去除任务
remove(task);