例12-2.txt

Java大学实用教程 耿祥义编著 课件 PPT

import java.applet.*;
import java.awt.*;
public class Boy extends Applet  
{  
    int x=5;
    public void paint(Graphics g) 
    {  
      x=x+12;
      if(x>=200)
        x=5;
      g.drawString("我们在学习repaint方法",20,x); 
      try {
            Thread.sleep(1000);
          }
      catch(InterruptedException ee)
          {
          }
      repaint();
    } 
   public void update(Graphics g)
    {
       g.clearRect(40,x-10,100,40);
       paint(g);
    }  
}