Java实现定时任务的三种方法（转）

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

public class Task1 {

public static void main(String[] args) {

// run in a second

final long timeInterval = 1000;

Runnable runnable = new Runnable() {

public void run() {

while (true) {

// ------- code for task to run

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

// ------- ends here

try {

Thread.sleep(timeInterval);

} catch (InterruptedException e) {

e.printStackTrace();

}

}

}

};

Thread thread = new Thread(runnable);

thread.start();

}

}

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

import java.util.Timer;

import java.util.TimerTask;

public class Task2 {

public static void main(String[] args) {

TimerTask task = new TimerTask() {

@Override

public void run() {

// task to run goes here

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

}

};

Timer timer = new Timer();

long delay = 0;

long intevalPeriod = 1 * 1000;

// schedules the task to be run in an interval

timer.scheduleAtFixedRate(task, delay,

intevalPeriod);

} // end of main

}

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

import java.util.concurrent.Executors;

import java.util.concurrent.ScheduledExecutorService;

import java.util.concurrent.TimeUnit;

public class Task3 {

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();

service.scheduleAtFixedRate(runnable, 0, 1, TimeUnit.SECONDS);

}

}