How to do housekeeping when an app closes

I am writing an app that needs to know when it has been closed so it can do some housekeeping. How do I know when a JFrame has been closed by the user?

LinuxMercedes wrote:
My apologies. I'm referring to the Runtime.addShutDownHook I noticed that the docs were for Java 6.When I post an API reference, I'm always copying it from another tab where I have the Java 6 doc open. That doesn't mean the reference only applies to java 6, however. Hopefully you, too, always keep a browser tab open to the API (If not, why not?). If you are developing in Java 5, then you must keep the API for Java 5 open. Is there any reason you haven't checked there? Also, new methods (almost always) end with the note (Since: 1.X). In this example, since 1.3.

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http://www.apple.com/support/iphone/assistant/phone/#section_1
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"Try Disk Utility
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PJRS

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How to do housekeeping when an app closes

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