// Fig. 22.3: CustomPanel.java // A customized JPanel class. import java.awt.Graphics; import javax.swing.JPanel; public class CustomPanel extends JPanel { public static enum Shape { CIRCLE, SQUARE }; private Shape shape; // type of shape to draw // use shape to draw an oval or rectangle public void paintComponent( Graphics g ) { super.paintComponent( g ); if ( shape == Shape.CIRCLE ) g.fillOval( 50, 10, 60, 60 ); // draw circle else if ( shape == Shape.SQUARE ) g.fillRect( 50, 10, 60, 60 ); // draw square } // end method paintComponent // set shape value and repaint CustomPanel public void draw( Shape shapeToDraw ) { shape = shapeToDraw; // set shape that will be drawn repaint(); // repaint the panel to draw new shape } // end method draw } // end class CustomPanel /************************************************************************** * (C) Copyright 1992-2005 by Deitel & Associates, Inc. and * * Pearson Education, Inc. All Rights Reserved. * * * * DISCLAIMER: The authors and publisher of this book have used their * * best efforts in preparing the book. These efforts include the * * development, research, and testing of the theories and programs * * to determine their effectiveness. The authors and publisher make * * no warranty of any kind, expressed or implied, with regard to these * * programs or to the documentation contained in these books. The authors * * and publisher shall not be liable in any event for incidental or * * consequential damages in connection with, or arising out of, the * * furnishing, performance, or use of these programs. * *************************************************************************/