Creating an Internal Frame

 
 boolean resizable = true;
 boolean closeable = true;
 boolean maximizable  = true;
 boolean iconifiable = true;
 int width = 200;
 int height = 50;
 JInternalFrame iframe = 
   new JInternalFrame("", resizable, closeable,
     maximizable, iconifiable);
 iframe.setSize(width, height);
     
 // Add component to internal frame.
     
 // Add internal frame to desktop.
 JDesktopPane desktop = new JDesktopPane();
 desktop.add(iframe);