copy.java

本书结合作者丰富的实践经验和深厚的理论基础

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
 public class copy extends JFrame {
   public copy (){
     super( "copy  area " );
     setSize( 280, 235 );
     setVisible( true );
   }
   public void paint( Graphics g ){
      super.paint(g);
      g.setColor( Color.magenta );
      g.drawOval( 110, 110, 50, 50 );
      g.copyArea(110,110,60,60,70,0);
      g.copyArea(110,110,60,60,-70,0);
      g.copyArea(110,110,60,60,0,-70);
      g.copyArea(110,110,60,60,0,70);
 }
  public static void main( String args[] ){
    copy app = new copy ();
    appDefaultCloseOperation(JFrame.EXIT_ON_CLOSE );
  }
}