Force some statements when exiting program

Hello,
I have created a class,
I want that when the program exits,
it should have a code that will be done before the program exits.
The following is for initialization :
public class myClass {
Static {
... do something
// what should I put here for finalization ?
Thanks :)

addShutdownHook doesn't work for some conditions
(it seems to be work for simple pure java)
If I do :
JOptionPane.showMessageDialog ... - doesn't work
System.out.println ... - work !!!
Thanks :)A quote from one of the references found by the following search
Because shutdown hooks run as threads, you must use thread-safe programming techniques. Otherwise you risk having threads interfere with each other. Also, it's wise to design your application for simple and fast shutdown processing. For example, you might run into trouble if your application uses services during shutdown that are themselves in the processing of being shut down.
http://www.google.com/search?q=java%2bshutdown%2bhook

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We don't know why was this code written. We are just moving the object from R/3 4.7 to ECC 6.0 and fixing the errors.
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My cancel button uses
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protected class QuitListener implements ActionListener, WindowListener {is there a way to disable InputVerifer?
Message was edited by:
ekin_00
add code around setVerifyInputWhenFocusTarget
Message was edited by:
ekin_00

A: InputVerify ... ugly shouldYieldFocus when exit dialog or windows

Works fine in the [url http://java.sun.com/docs/books/tutorial/uiswing/misc/focus.html#inputVerification]Input Verification Demo.
I changed the code to display the panel in a dialog instead of the JFrame.
//        frame.setContentPane(newContentPane);
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Force some statements when exiting program

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