dataapp.java

方面

package dataapp;

import java.awt.*;
import java.awt.event.*;
import java.lang.Thread;
import java.awt.Font;
import java.applet.*;
import java.util.Date;

/**
 * <p>Title: </p>
 * <p>Description: </p>
 * <p>Copyright: Copyright (c) 2002</p>
 * <p>Company: </p>
 * @author unascribed
 * @version 1.0
 */

public class dataapp extends Applet implements Runnable{
  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);
  }
Font theFont;//文本显示
  Date theDate; //日期变量
   Thread runner; //线程类型
public void run(){
   while(true){
   repaint();
   try {
   Thread.sleep(1000);}
   catch(InterruptedException e){}
   }
}
public void start(){
  if(runner==null){
  runner=new Thread(this);
  runner.start();}
  if(runner!=null)
  {
 runner.stop();
 runner=null;
 }
 }
public void paint(Graphics  g){
   g.setFont(theFont);
   theDate=new Date();
   g.drawString(theDate.toString(),20,50);
}

  //Construct the applet
  public dataapp() {
  }
  //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;
  }
}