java定时案例

     好久没写笔记了，变懒了！

    java定时运行的三个案例:

一， 通过sleep方法来达到定时任务的效果　

public class testTime {
    public static void main(String[] args) {
        // 设定时间间隔为1秒
        final long timeInterval = 1000;
        Runnable runnable = new Runnable() {
            public void run() {
                while (true) {
                    // 执行任务
                    System.out.println("Hello !!");
                    try {
                        Thread.sleep(timeInterval);
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                }
            }
        };
        Thread thread = new Thread(runnable);
        thread.start();
    }
}

二，TimerTask

public class testTime2 {
    public static void main(String[] args) {  
        TimerTask task = new TimerTask() {   
            public void run() {   
                System.out.println("执行！");  
            }  
        };  
        Timer timer = new Timer();  
        long delay = 0;  
        long intevalPeriod = 1 * 1000;   
        timer.scheduleAtFixedRate(task, delay, intevalPeriod);  
    }    
}

三，ScheduledExecutorService

public class testTime3 {
    public static void main(String[] args) {  
        Runnable runnable = new Runnable() {  
            public void run() {   
                System.out.println("执行!");  
            }  
        };  
        ScheduledExecutorService service = Executors  
                .newSingleThreadScheduledExecutor();  
        // “10”延时时间，“1”为定时执行的间隔时间，  TimeUnit.SECONDS为时间单位
        service.scheduleAtFixedRate(runnable, 10, 1, TimeUnit.SECONDS);  
    }  
}

以上三个案例笔者均已验证！