22.7. JDesktopPane and JInternalFrame
Many of today’s applications use a multiple-document interface (MDI)—a main window (called the parent window) containing other windows (called child windows), to manage several open documents that are being processed in parallel. For example, many e-mail programs allow you to have several windows open at the same time, so you can compose or read multiple e-mail messages simultaneously. Similarly, many word processors allow the user to open multiple documents in separate windows, making it possible to switch between them without having to close one to open another. The application in Figs. 22.11–22.12 demonstrates Swing’s JDesktopPane and JInternalFrame classes for implementing multiple-document interfaces. ...
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