java再次设置Timer的schedule

来源：互联网发布：node.js代替php 编辑：程序博客网时间：2024/04/29 22:48

Timer定时器启动以后需要更改定时器的执行频率，可以使用如下方法：

package test;import java.util.Date;import java.util.Timer;import java.util.TimerTask;import common.util.DateTimeFormatUtil;import common.util.P;public class TimerUpdate {static int time = 1000;static int i=0; static Timer t = new Timer();public static void main(String[] args) {t.schedule(new TimerUpdate().init(),new Date(),time);//这里的3000是毫秒}private myTask init() {return new myTask();}class myTask  extends TimerTask{private int time; // 定时执行时间public myTask() {super();}public myTask(int time) {this.time = time;}@Overridepublic void run() {P.print(i++ + " -- " + Thread.currentThread().getName() + " ^^^^^^^^^^^^ " + DateTimeFormatUtil.format(new Date()));if(i % 5 == 0){t.cancel();t = null;t = new Timer();t.schedule(new myTask(5000), time);}else{t.cancel();t = null;t = new Timer();t.schedule(new myTask(3000), time);}}}}

执行结果：

0 -- Timer-0 ^^^^^^^^^^^^ 2016-04-11 17:15:10

1 -- Timer-1 ^^^^^^^^^^^^ 2016-04-11 17:15:10

2 -- Timer-2 ^^^^^^^^^^^^ 2016-04-11 17:15:13

3 -- Timer-3 ^^^^^^^^^^^^ 2016-04-11 17:15:16

4 -- Timer-4 ^^^^^^^^^^^^ 2016-04-11 17:15:19

5 -- Timer-5 ^^^^^^^^^^^^ 2016-04-11 17:15:22

6 -- Timer-6 ^^^^^^^^^^^^ 2016-04-11 17:15:27

7 -- Timer-7 ^^^^^^^^^^^^ 2016-04-11 17:15:30

8 -- Timer-8 ^^^^^^^^^^^^ 2016-04-11 17:15:33

9 -- Timer-9 ^^^^^^^^^^^^ 2016-04-11 17:15:36

10 -- Timer-10 ^^^^^^^^^^^^ 2016-04-11 17:15:39

11 -- Timer-11 ^^^^^^^^^^^^ 2016-04-11 17:15:44

12 -- Timer-12 ^^^^^^^^^^^^ 2016-04-11 17:15:47

13 -- Timer-13 ^^^^^^^^^^^^ 2016-04-11 17:15:50

14 -- Timer-14 ^^^^^^^^^^^^ 2016-04-11 17:15:53

15 -- Timer-15 ^^^^^^^^^^^^ 2016-04-11 17:15:56

16 -- Timer-16 ^^^^^^^^^^^^ 2016-04-11 17:16:01

17 -- Timer-17 ^^^^^^^^^^^^ 2016-04-11 17:16:04

18 -- Timer-18 ^^^^^^^^^^^^ 2016-04-11 17:16:07

0 0