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execute a class Before Window is shutting down

Posted on 2002-06-21
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Last Modified: 2010-03-31
Hi, as question title, how do i execute a class before Window is shutting down? Can i do that? Thanks
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Question by:chencc77
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Expert Comment

by:googlyralph
ID: 7098322
You can add code to the window adapter that handles events connected with closing a window. This allows things like "are you sure you want to exit" type dialogs, as well as any other code. Look up the class, WindowAdapter in the Java API documentation.

GR.
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by:chencc77
ID: 7098350
Hi, I don't mean my java program can shut down the pc. But the program itself only auto execute when the pc is going to shut down.
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by:googlyralph
ID: 7098361
From Java im not sure. You will need to register an interest with the system for an on shutdown event. Check the Microsoft Java API, but i doubt there will be anything there. Failing that look up on MSDN (msdn.microsoft.com) about registering an interest in system shutdown event. Then you will need to write some jni code that watchs for a system shutdown and passes on the information to the Java code.

(Assuming you are talking about Windows that is)

GR.
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objects earned 50 total points
ID: 7098369
Try using addShutdownHook() method in runtime class:

Runtime.getRuntime().addShutdownHook(mythread);
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by:chencc77
ID: 7098377
i see. Thanks googlyralph. ^-^
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by:googlyralph
ID: 7098378
If the JVM is running all the time, the go for Objects idea.

GR.
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Expert Comment

by:CEHJ
ID: 7098414
listening...
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by:chencc77
ID: 7098525
Thanks, it works.
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by:objects
ID: 7099700
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