public class TimerTest01 {
 Timer timer;
 public TimerTest01(int time){
  timer = new Timer();
  timer.schedule(new TimerTaskTest01(), time * 1000);
 }
 
 public static void main(String[] args) {
  System.out.println("timer begin....");
  new TimerTest01(3);
 }
}

public class TimerTaskTest01 extends TimerTask{

 public void run() {
  System.out.println("Time's up!!!!");
 }
}

首先打印：timer begin....

3秒后打印：Time's up!!!!

public class TimerTest02 {
 Timer timer;
 
 public TimerTest02(){
  Date time = getTime();
  System.out.println("指定时间time=" + time);
  timer = new Timer();
  timer.schedule(new TimerTaskTest02(), time);
 }
 
 public Date getTime(){
  Calendar calendar = Calendar.getInstance();
  calendar.set(Calendar.HOUR_OF_DAY, 11);
  calendar.set(Calendar.MINUTE, 39);
  calendar.set(Calendar.SECOND, 00);
  Date time = calendar.getTime();
  
  return time;
 }
 
 public static void main(String[] args) {
  new TimerTest02();
 }
}

public class TimerTaskTest02 extends TimerTask{

 @Override
 public void run() {
  System.out.println("指定时间执行线程任务...");
 }
}

指定时间time=Tue Jun 10 11:39:00 CST 2014
指定时间执行线程任务...

public class TimerTest03 {
 Timer timer;
 
 public TimerTest03(){
  timer = new Timer();
  timer.schedule(new TimerTaskTest03(), 1000, 2000);
 }
 
 public static void main(String[] args) {
  new TimerTest03();
 }
}

public class TimerTaskTest03 extends TimerTask{

 @Override
 public void run() {
  Date date = new Date(this.scheduledExecutionTime());
  System.out.println("本次执行该线程的时间为：" + date);
 }
}

本次执行该线程的时间为：Tue Jun 10 21:19:47 CST 2014
本次执行该线程的时间为：Tue Jun 10 21:19:49 CST 2014
本次执行该线程的时间为：Tue Jun 10 21:19:51 CST 2014
本次执行该线程的时间为：Tue Jun 10 21:19:53 CST 2014
本次执行该线程的时间为：Tue Jun 10 21:19:55 CST 2014
本次执行该线程的时间为：Tue Jun 10 21:19:57 CST 2014
.................

public class TimerTest04 {
 private Timer timer;
 public long start; 
 
 public TimerTest04(){
  this.timer = new Timer();
  start = System.currentTimeMillis();
 }
 
 public void timerOne(){
  timer.schedule(new TimerTask() {
   public void run() {
    System.out.println("timerOne invoked ,the time:" + (System.currentTimeMillis() - start));
    try {
     Thread.sleep(4000); //线程休眠3000
    } catch (InterruptedException e) {
     e.printStackTrace();
    }
   }
  }, 1000);
 }
 
 public void timerTwo(){
  timer.schedule(new TimerTask() {
   public void run() {
    System.out.println("timerOne invoked ,the time:" + (System.currentTimeMillis() - start));
   }
  }, 3000);
 }
 
 public static void main(String[] args) throws Exception {
  TimerTest04 test = new TimerTest04();
  
  test.timerOne();
  test.timerTwo();
 }
}

timerOne invoked ,the time:1001
timerOne invoked ,the time:3001

timerOne invoked ,the time:1000
timerOne invoked ,the time:5000

public class TimerTest04 {
 private Timer timer;
 
 public TimerTest04(){
  this.timer = new Timer();
 }
 
 public void timerOne(){
  timer.schedule(new TimerTask() {
   public void run() {
    throw new RuntimeException();
   }
  }, 1000);
 }
 
 public void timerTwo(){
  timer.schedule(new TimerTask() {
   
   public void run() {
    System.out.println("我会不会执行呢？？");
   }
  }, 1000);
 }
 
 public static void main(String[] args) {
  TimerTest04 test = new TimerTest04();
  test.timerOne();
  test.timerTwo();
 }
}

Exception in thread "Timer-0" java.lang.RuntimeException
 at com.chenssy.timer.TimerTest04$1.run(TimerTest04.java:25)
 at java.util.TimerThread.mainLoop(Timer.java:555)
 at java.util.TimerThread.run(Timer.java:505)

public class ScheduledExecutorTest {
 private ScheduledExecutorService scheduExec;
 
 public long start;
 
 ScheduledExecutorTest(){
  this.scheduExec = Executors.newScheduledThreadPool(2); 
  this.start = System.currentTimeMillis();
 }
 
 public void timerOne(){
  scheduExec.schedule(new Runnable() {
   public void run() {
    System.out.println("timerOne,the time:" + (System.currentTimeMillis() - start));
    try {
     Thread.sleep(4000);
    } catch (InterruptedException e) {
     e.printStackTrace();
    }
   }
  },1000,TimeUnit.MILLISECONDS);
 }
 
 public void timerTwo(){
  scheduExec.schedule(new Runnable() {
   public void run() {
    System.out.println("timerTwo,the time:" + (System.currentTimeMillis() - start));
   }
  },2000,TimeUnit.MILLISECONDS);
 }
 
 public static void main(String[] args) {
  ScheduledExecutorTest test = new ScheduledExecutorTest();
  test.timerOne();
  test.timerTwo();
 }
}

timerOne,the time:1003
timerTwo,the time:2005

public class ScheduledExecutorTest {
 private ScheduledExecutorService scheduExec;
 
 public long start;
 
 ScheduledExecutorTest(){
  this.scheduExec = Executors.newScheduledThreadPool(2); 
  this.start = System.currentTimeMillis();
 }
 
 public void timerOne(){
  scheduExec.schedule(new Runnable() {
   public void run() {
    throw new RuntimeException();
   }
  },1000,TimeUnit.MILLISECONDS);
 }
 
 public void timerTwo(){
  scheduExec.scheduleAtFixedRate(new Runnable() {
   public void run() {
    System.out.println("timerTwo invoked .....");
   }
  },2000,500,TimeUnit.MILLISECONDS);
 }
 
 public static void main(String[] args) {
  ScheduledExecutorTest test = new ScheduledExecutorTest();
  test.timerOne();
  test.timerTwo();
 }
}

timerTwo invoked .....
timerTwo invoked .....
timerTwo invoked .....
timerTwo invoked .....
timerTwo invoked .....
timerTwo invoked .....
timerTwo invoked .....
timerTwo invoked .....
timerTwo invoked .....
........................