public class TimerTest {

    public static void main(String[] args){
           Timer timer = new Timer();
        timer.schedule(new MyTask(), 1000, 2000);//在1秒后執行此任務,每次間隔2秒,如果傳遞一個Data參數,就可以在某個固定的時間執行這個任務.
        while(true){//這個是用來停止此任務的,否則就一直循環執行此任務了
            try {
                int ch = System.in.read();
                if(ch-'c'==0){
                    timer.cancel();//使用這個方法退出任務

                }
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
    }

   
    static class MyTask extends java.util.TimerTask{
        @Override
        public void run() {
            // TODO Auto-generated method stub
            System.out.println("________");
        }
    }
    }

import java.io.IOException;
import java.util.Timer;
/*
 * 本類給出了使用Timer和TimerTaske的主要方法,其中包括定制任務,添加任務
 * 退出任務,退出定時器.
 * 因為TimerTask的status域是包級可訪問的,所以沒有辦法在java.util.包外
 * 得到其狀態,這對編程造成一些不便 .我們不能判斷某個Task的狀態了.
 *
 */

public class TimerTest {

    public static void main(String[] args) {
        Timer timer = new Timer();
        MyTask myTask1 = new MyTask();
        MyTask myTask2 = new MyTask();
        myTask2.setInfo("myTask-2");
        timer.schedule(myTask1, 1000, 2000);
        timer.scheduleAtFixedRate(myTask2, 2000, 3000);
        while (true) {
 try {

                byte[] info = new byte[1024];
                int len = System.in.read(info);
                String strInfo = new String(info, 0, len, "GBK");//從控制臺讀出信息
                if (strInfo.charAt(strInfo.length() - 1) == ' ') {
                    strInfo = strInfo.substring(0, strInfo.length() - 2);
                }
                if (strInfo.startsWith("Cancel-1")) {                     myTask1.cancel();//退出單個任務
                    // 其實應該在這里判斷myTask2是否也退出了,是的話就應該break.但是因為無法在包外得到
                    // myTask2的狀態,所以,這里不能做出是否退出循環的判斷.
                } else if (strInfo.startsWith("Cancel-2")) {
      myTask2.cancel();
                } else if (strInfo.startsWith("Cancel-All")) {
                     timer.cancel();//退出Timer
                    break;
                } else {
                    // 只對myTask1作出判斷,偷個懶^_^
                    myTask1.setInfo(strInfo);
                }
            } catch (IOException e) {                 // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
 }

    static class MyTask extends java.util.TimerTask {
            String info = "^_^";

        @Override
        public void run() {

            // TODO Auto-generated method stub
            System.out.println(info);
        }
  public String getInfo() {
            return info;
        }

        public void setInfo(String info) {

            this.info = info;
        }

    }

}