Other Swing Changes

Add EXIT_ON_CLOSE defaultCloseOperation Constant

JFrame provides the setDefaultCloseOperation method which can be used to configure the default action when a JFrame is closed. For single framed applications it often the case that closing the frame will exit the application. Previously, developers had to add a WindowListener and do this themselves. To make this common case easier for developers to accomplish, a constant has been added to JFrame that specifies when the frame closes the application should exit: See:

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