详解JAVA Timer和TimerTask

 import java.util.Timer; 
 import java.util.TimerTask; 
 public class TimerTest { 
   static class MyTimerTask1 extends TimerTask { 
     public void run() { 
       System.out.println("爆炸！！！"); 
     } 
   }   
   public static void main(String[] args) { 
     Timer timer = new Timer(); 
     timer.schedule(new MyTimerTask1(), 2000);// 两秒后启动任务 
   } 
 } 

 import java.util.Date; 
 import java.util.Timer; 
 import java.util.TimerTask; 
 public class TimerTest { 
   static class MyTimerTask1 extends TimerTask { 
     public void run() { 
       System.out.println("爆炸！！！"); 
       new Timer().schedule(new MyTimerTask2(), 2000); 
     } 
   } 
   static class MyTimerTask2 extends TimerTask { 
     public void run() { 
       System.out.println("爆炸！！！"); 
       new Timer().schedule(new MyTimerTask1(), 3000); 
     } 
   } 
   public static void main(String[] args) { 
     Timer timer = new Timer(); 
     timer.schedule(new MyTimerTask2(), 2000); 
     while(true) { 
       System.out.println(new Date().getSeconds()); 
       try { 
         Thread.sleep(1000); 
       } catch (InterruptedException e) { 
         // TODO Auto-generated catch block 
         e.printStackTrace(); 
       } 
     } 
   } 
 }