一个简单的Timer例子 
山哥 http://csdn.blog.net/duoshan 
有时想要换一定的间隔时间执行重复的任务,java.util.Timer可以很简单的帮你实现。当然你也可以用多线程来实现。下面是用java.util.Timer来实现这个功能。 
//myTask.java  定义TimerTask任务,我们会在doTask中调用. 
//这里只是简单的打印一下任务参数 
public class myTask     extends java.util.TimerTask {   String jobName;   private int i;   public void run() { //run in interface Runnabl     System.out.println(jobName);   } 
  public myTask(String jobName) {     this.jobName = jobName;   } } 
//doTask.java  
import java.util.*; import java.io.*; 
public class doTask {   private java.util.Timer timer;   private java.util.TimerTask task;   public doTask(java.util.TimerTask task) {     this.timer = new Timer();     this.task = task;   }   public void start(int delay, int internal) {     timer.schedule(task, delay * 1000, internal * 1000);//利用timer.schedule方法   } 
  public static void main(String[] args) {     java.util.TimerTask task1 = new myTask("     Job 1");     java.util.TimerTask task2= new myTask("Job 2");     doTask pt = new doTask(task1);     pt.start(1,3);     doTask pt2 = new doTask(task2);     pt2.start(1,1);   } 
} 
结果如下; 
     Job 1 Job 2 Job 2 Job 2      Job 1 Job 2 Job 2 Job 2 . .  
 
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