java学习—— Timer执行定时任务

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简单Timer使用实例，

import java.util.TimerTask;/** * timer演示 */public class TimerDemo {public static void main(String[] args) {System.out.println("currentThread id " + Thread.currentThread().getId());//创建一个定时器Timer timer = new Timer();//启动定时器 执行定时任务， 启动时间是1s后，每隔1s执行一次 timer.schedule(new RemindTask(), 1000 , 1000); //timer.cancel(); //终止定时器}/** * 继承TimerTask 定时任务  */static class RemindTask extends TimerTask {        public void run() {        System.out.println("currentThread id " + Thread.currentThread().getId());            System.out.println("Time's up!");            //timer.cancel(); //Terminate the timer thread        }    } }

Timer是线程安全的。

测试结果：

currentThread id 1currentThread id 8Time's up!currentThread id 8Time's up!currentThread id 8Time's up!currentThread id 8Time's up!currentThread id 8Time's up!currentThread id 8Time's up!

简单Timer使用实例，

import java.util.TimerTask;/** * timer演示 */public class TimerDemo {public static void main(String[] args) {System.out.println("currentThread id " + Thread.currentThread().getId());//创建一个定时器Timer timer = new Timer();//启动定时器 执行定时任务， 启动时间是1s后，每隔1s执行一次 timer.schedule(new RemindTask(), 1000 , 1000); //timer.cancel(); //终止定时器}/** * 继承TimerTask 定时任务  */static class RemindTask extends TimerTask {        public void run() {        System.out.println("currentThread id " + Thread.currentThread().getId());            System.out.println("Time's up!");            //timer.cancel(); //Terminate the timer thread        }    } }

Timer是线程安全的。

测试结果：

currentThread id 1currentThread id 8Time's up!currentThread id 8Time's up!currentThread id 8Time's up!currentThread id 8Time's up!currentThread id 8Time's up!currentThread id 8Time's up!

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