Graphic Java 2: Mastering the Jfc, By Geary, 3Rd Edition, Volume 2: Swing

Buttons are very useful, but even with great images forming the buttons, they still lack a certain glamour every application has buttons. For the next example, let's take a look at JInternalFrame, which allows you to create free-standing frames with menus, title bars, and everything else a Frame needs right inside your application.