java中定时器总结_JAVA_编程开发_程序员俱乐部

class="java">/**
	 * 延迟20000毫秒执行 java.util.Timer.schedule(TimerTask task, long delay)
	 */
	public static void timer1() {
		Timer nTimer = new Timer();
		nTimer.schedule(new TimerTask() {
			public void run() {
				System.err.println("-------设定要指定任务--------");
			}
		}, 2000);
	}

/**
	 * java.util.Timer.schedule(TimerTask task, long delay)
	 */
	public static void timer2() {
		Timer timer = new Timer();
		timer.schedule(new TimerTask() {
			public void run() {
				System.out.println("-------延迟5000毫秒，每1000毫秒执行一次--------");
			}
		}, 5000, 1000);
	}

/**
	 * java.util.Timer.schedule(TimerTask task, long delay)
	 */
	public static void timer3() {
		Timer timer = new Timer();
		timer.scheduleAtFixedRate(new TimerTask() {
			public void run() {
				System.err.println("-------延迟5000毫秒，每1000毫秒执行一次--------");
			}
		}, 5000, 1000);
	}

/**
	 * 设置17：56执行任务
	 * java.util.Timer.scheduleAtFixedRate(TimerTask task, Date firstTime, long period)
	 */
	public static void timer4() {
		Calendar calendar = Calendar.getInstance();
		calendar.set(Calendar.HOUR_OF_DAY, 17);
		calendar.set(Calendar.MINUTE, 56);
		calendar.set(Calendar.SECOND, 0);

		Date time = calendar.getTime();

		Timer timer = new Timer();
		timer.scheduleAtFixedRate(new TimerTask() {
			public void run() {
				System.out.println("-------设定要指定任务--------");
			}
		}, time, 1000 * 60 * 60 * 24);// 这里设定将延时每天固定执行
	}