clock.java

提供了常用的JAVA技术的示例

// 11-2  通 过 接 口 实 现 线 程 体 。
package Clock;

import java.util.*;
import java.awt.Graphics;
import java.lang.ThreadGroup;

public class Clock extends java.applet.Applet implements Runnable{
  Thread clockThread;
  public void start(){
    if(clockThread==null){
      clockThread=new Thread(this);
      clockThread.setName("clock");
      clockThread.start();
    }
  }
  public void run(){
    for(int i=0;i<2;i++){
      System.out.println(i+this.getName());
      try{
        clockThread.sleep(1000);
      }
      catch(InterruptedException e){  }
    }
    System.out.println("done!"+this.getName());
  }

  public void repaint(Graphics g){
    Date now=new Date();
    g.drawString(now.getHours()+":"+now.getMinutes()+":"+now.getSeconds(),5,10);
    //System.out.print(now.getHours()+":"+now.getMinutes()+":"+now.getSeconds());
  }
  public void stop(){
    clockThread.stop();
    clockThread=null;
  }

  public static void main(String a[])throws InterruptedException{

    Thread t=new Thread();
    System.out.println("t.isAlive()=  "+t.isAlive());
    System.out.println("t.currentThread()=  "+t.currentThread());
    System.out.println("t.getClass()=  "+t.getClass());
    System.out.println("t.getName()=  "+t.getName());
    System.out.println("t.getPriority()=  "+t.getPriority());
    System.out.println("t.getContextClassLoader()=  "+t.getContextClassLoader());
    System.out.println("t.interrupted()=  "+t.interrupted());
    System.out.println("t.activeCount()=  "+t.activeCount());
    System.out.println("t.isDaemon()=  "+t.isDaemon());
    System.out.println("t.toString()=  "+t.toString());

    System.out.println();
    Clock c=new Clock();
    c.start();

  }
}