How to get the value from a cell in jTable without click "enter" or "tab"

Hi guys,
I have a simple question. I have a jTable in my screen and when editing a value, but without click "enter" or "tab" I want to get the new value. I have a button update and after editing the value I click the button "update" and I want the new value to be store in my table. If try to get the selected value it is giving the old value. How can I implement this? Any idea? I hope I was clear.
Thanks

[Table Stop Editing|http://www.camick.com/java/blog.html?name=table-stop-editing]

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[cut]
i am executing an sql query which return a union of
values from two tables.
the problem here is how do i read the values from the
resultset.[cut]
When the error occours?
1) Executing query ?
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