rect.java

一个applet程序

import java.applet.*;
import java.awt.*;
public class Rect extends Applet
{public void init()
 {
 }
 
 public void paint(Graphics g)
 {Insets insets=this.insets();
  int x=0,y=0;
  int w=size().width-insets.left-insets.right;
  int h=size().height-insets.top-insets.bottom;
  g.setColor(Color.red);
  while(w>0&&h>0)
  {g.clearRect(x++,y++,w,h);
   g.fillRect(x++,y++,w-2,h-2);
   w-=4;
   h-=4;
  }
 }
}