Swing .............how to undo the changes made by user

Hi,
i have created a form in swing asking for the related information from user whose value i m taking in jformetted textfield.
now i have placed two buttons there.
one is Apply and second is Cancel.
when user pressed Apply button all the changes made by the user must be set where as if user clicks cancel button all the changes made by user should be undo to previously set value.
can anybody help me how this can be done and what code should i write in action performed method
thanks in advance
plz reply

thanx.
one more thing
In my application,there is one Button called Option when u clicked on it.It opens up one internal frame where user is asked to asked to fill some parameters.
1) Now how can i restrict user to create one more internal frame unless first one is closed.
2) suppose i clicked option button and it opens up internal frame where i can set the parameters and closed it.If i again click on option then i want the parameter to have wht i just set.
3) and how can pass those parameters value to my main frame from where i m calling internal frame
Plz reply
Edited by: neel007 on Mar 11, 2009 8:02 PM

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