java Timer测试定时调用及固定时间执行代码示例

Z时代
2024-01-10
分类：综合

本文实例主要进行java Timer（定时调用、固定时间执行）测试，具体实现代码如下。

测试1

当任务执行时间小于重复执行的间隔时间

代码：


public class TimerTest2 {
  public static void main(String[] args) throws InterruptedException {
    Timer timer = new Timer();
    timer.schedule(new MyTask(0), 1000, 10000);
    //timer.schedule(new MyTask(1), 1000, 10000);
  }
  static class MyTask extends TimerTask {
    private final int i;
    public MyTask(int i) {
      this.i = i;
    }
    @Override
    public void run() {
      System.out.println(i + "dddd" + DateTimeUtil.getDateTimeString("yyyy-MM-dd HH:mm:ss.SSS"));
      try {
        if (i == 0) {
          Thread.sleep(8000L);
        } else {
          Thread.sleep(13000L);
        }
      } catch (Exception e) {
        e.printStackTrace();
      }
    }
  }
}

结果：

0dddd2018-01-11 15:34:57.826
0dddd2018-01-11 15:35:07.824
0dddd2018-01-11 15:35:17.824
0dddd2018-01-11 15:35:27.824
0dddd2018-01-11 15:35:37.824
0dddd2018-01-11 15:35:47.824
0dddd2018-01-11 15:35:57.824
0dddd2018-01-11 15:36:07.824
0dddd2018-01-11 15:36:17.824
0dddd2018-01-11 15:36:27.824
0dddd2018-01-11 15:36:37.824
0dddd2018-01-11 15:36:47.824
0dddd2018-01-11 15:36:57.824
0dddd2018-01-11 15:37:07.824
0dddd2018-01-11 15:37:17.824
0dddd2018-01-11 15:37:27.824
0dddd2018-01-11 15:37:37.824

测试2

当任务执行时间大于重复执行的间隔时间

代码：


public class TimerTest2 {
  public static void main(String[] args) throws InterruptedException {
    Timer timer = new Timer();
    //timer.schedule(new MyTask(0), 1000, 10000);
    timer.schedule(new MyTask(1), 1000, 10000);
  }
  static class MyTask extends TimerTask {
    private final int i;
    public MyTask(int i) {
      this.i = i;
    }
    @Override
    public void run() {
      System.out.println(i + "dddd" + DateTimeUtil.getDateTimeString("yyyy-MM-dd HH:mm:ss.SSS"));
      try {
        if (i == 0) {
          Thread.sleep(8000L);
        } else {
          Thread.sleep(13000L);
        }
      } catch (Exception e) {
        e.printStackTrace();
      }
    }
  }
}

结果：

1dddd2018-01-11 16:03:07.575
1dddd2018-01-11 16:03:20.601
1dddd2018-01-11 16:03:33.602
1dddd2018-01-11 16:03:46.603
1dddd2018-01-11 16:03:59.604
1dddd2018-01-11 16:04:12.606
1dddd2018-01-11 16:04:25.607
1dddd2018-01-11 16:04:38.608