java中常见的3种自动任务

一、线程循环

package com.test.timetask;

public class ThreadLine {

@SuppressWarnings("deprecation")

public static void gorun(int i) {

final long timeInterval = 5 * 1000;

Runnable runnable = new Runnable() {

@Override

public void run() {

int j = 1;

while (true) {

System.out.println("某某第" + j++ + "次循环！");

try {

Thread.sleep(timeInterval);

} catch (InterruptedException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

}

};

Thread thread = new Thread(runnable);

if (i > 0) {

thread.stop();

} else {

thread.start();

}

}

public static void test() {

while (true) {

System.out.println("nihao");

try {

Thread.sleep(7000);

} catch (InterruptedException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

}

public static void main(String[] args) {

test();

}

}

二、TimerTask

package com.test.timetask;

import java.util.Timer;

import java.util.TimerTask;

public class TimerTask1 extends TimerTask {

@Override

public void run() {

// TODO Auto-generated method stub

System.out.println("cencen");

}

public static void main(String[] args) {

TimerTask1 task1 = new TimerTask1();

Timer timer = new Timer(false);

long delay = 0;

long intevalPeriod = 3 * 1000;

// schedules the task to be run in an interval

timer.schedule(task1, delay, intevalPeriod);

// timer.cancel();

}

// end of main

}

三、scheduleAtFixedRate

package com.test.timetask;

import java.util.concurrent.Executors;

import java.util.concurrent.ScheduledExecutorService;

import java.util.concurrent.TimeUnit;

public class TimerTask3{

public static void main(String[] args) {

Runnable runnable = new Runnable() {

public void run() {

// task to run goes here

System.out.println("Hello !!");

}

};

ScheduledExecutorService service = Executors.newSingleThreadScheduledExecutor();

//任务，启动多久开始执行，执行的时间间隔，时间单位

service.scheduleAtFixedRate(runnable, 6, 5, TimeUnit.SECONDS);

}

}