clock.java

很好得jbuilder100例源代码

import java.awt.*;
import java.awt.event.*;
import java.applet.*;
import  java.util.Date;

public class clock extends java.applet.Applet implements Runnable{
   Font myfont=new Font("TimesRoman",Font.BOLD,18);
   Color mycolor=new Color(255,0,0);
   Date mydate;
   Thread runner;
  boolean isStandalone = false;
  /**Get a parameter value*/
  public String getParameter(String key, String def) {
    return isStandalone ? System.getProperty(key, def) :
      (getParameter(key) != null ? getParameter(key) : def);
  }
  public void start(){
   if(runner==null){
      runner=new Thread(this);
      runner.start();
      }
  }
  public void stop(){
   if(runner!=null){
       runner.stop();
       runner=null;
   }
  }
   public void run(){
      while(true){
        mydate=new Date();
        repaint();
        try{
           Thread.sleep(1000); }
        catch(InterruptedException e){}
      }
   }
   public void paint(Graphics g)
   {g.setFont(myfont);
   g.setColor(mycolor);
   g.drawString(mydate.toString(),20,100);
   }
  /**Construct the applet*/
  public clock() {
  }
  /**Initialize the applet*/
  public void init() {
    try {
      jbInit();
    }
    catch(Exception e) {
      e.printStackTrace();
    }
  }
  /**Component initialization*/
  private void jbInit() throws Exception {
  }
  /**Get Applet information*/
  public String getAppletInfo() {
    return "Applet Information";
  }
  /**Get parameter info*/
  public String[][] getParameterInfo() {
    return null;
  }
}