[java] Java Internal Frames

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

public class DesktopTest extends JFrame {
    
    public DesktopTest()
    {
        super( "Using a Desktop" );
        
        JMenuBar bar = new JMenuBar( );
        
        JMenu addMenu = new JMenu( "Add" );
        
        JMenuItem newFrame = new JMenuItem( "Internal Frame");
        addMenu.add( newFrame );
        bar.add( addMenu );
        setJMenuBar( bar );
        
        
        final JDesktopPane theDesktop = new JDesktopPane( );
        getContentPane( ).add( theDesktop );
        
        newFrame.addActionListener(
            new ActionListener( ){
                public void actionPerformed( ActionEvent e )
                {
                    JInternalFrame frame = 
                        new JInternalFrame( "Internal Frame" , true, true, true, true );
                    
                    Container c = frame.getContentPane( );
                    MyJPanel panel = new MyJPanel( );
                    
                    c.add( panel , BorderLayout.CENTER );
                    frame.setSize(
                        panel.getImageWidthHeight().width,
                        panel.getImageWidthHeight( ).height );
                    frame.setOpaque( true );
                    theDesktop.add( frame );
                }
        }
        );
        
        setSize( 640, 480 );
        show( );
    }
    
    public static void main( String args[ ] )
    {
        DesktopTest app = new DesktopTest();
        app.addWindowListener(
            new WindowAdapter( ){
                public void windowClosing( WindowEvent e )
                {
                    System.exit( 0);
                }
        }
        );
    }
    
    public class MyJPanel extends JPanel{ 
        
        private ImageIcon imgIcon;
        
        public MyJPanel( )
        {
            imgIcon = new ImageIcon( "E:\\Java\\bug.gif" );
        }
        
        public void paintComponent( Graphics g )
        {
            imgIcon.paintIcon( this , g , 0  , 0 );
        }
        
        public Dimension getImageWidthHeight( )
        {
            return new Dimension( imgIcon.getIconWidth(), imgIcon.getIconHeight() );
        }
    }
}