How to fire "table change" once click other regions outside the table erea?

I have a JTable created with DefaultTableModel. Usually the edit behavior of table cell is like this:
1) Select one cell, it is highlighted in blue.
2) Double click the cell, it's made editable with white background.
3) Two scenarios
(a) Once finish edit, press "Enter", the cell background turns from white to blue. At the same time, the table change is "fired" .
(b) Once finish edit, click another cell, the originall cell turns white, and the new-clicked cell is highlighted in blue. At the same time, the table change is "fired".
4) While editing one cell, and click somewhere OUTSIDE the table area. In this case, the table change is NOT fired.
[This cause a confusion, user sees the changed text in table cell, but actually it is not stored and will not be stored in the table.]
So what I want to implement is: once click the region outside the table, the text in that editabe cell (where you are just editing) is stored and fired.
Can you help me? Thanks in advance!

sabre150 & other experts,
[see background in my first message]
User is still not completely satisfied with the current behavior, though "table changed" can be fired when clicking other controls(eg. buttons or checkboxes).
If I click a panel region(instead of a particular control), the "table changed" can not be fired. However, it is expected.
I guess the reason is:
a panel doesn't has a focus. so when clicking panel, the focus is not "lost" to the table cell.
Any hints?

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How to fire "table change" once click other regions outside the table erea?

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