How can I put validation for JTextField when gotfocus and lostfocus

Hi,
How can I put validation for JTextField when gotfocus and lostfocus ?
Thanks
Wilson

You add a focusListener to the control you wish to monitor. In the focusLost() handler you do whatever, in the focusGained() handler you do whatever.

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How can I put validation for JTextField when gotfocus and lostfocus

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