How to handle the Cancel button on JOptionPane.showInputDialog

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Bala - 30 Sep 2004 14:52 GMT

I have a input dialog that gets the password. When i enter a value and
click OK it works fine. But when i click Cancel i get a Null Pointer
Exception. How to handle the Cancel button

Any help in this regard would be greatly apprecialted

thanks in advance
Bala

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Andrew Thompson - 30 Sep 2004 15:22 GMT

> But when i click Cancel i get a Null Pointer
> Exception. How to handle the Cancel button..

Catch it.

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Andrew Thompson
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Dirk Gerrit Oort - 30 Sep 2004 15:26 GMT

The api say:
Returns:
user's input, or null meaning the user canceled the input

so test before use on null

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D.G. Oort

>I have a input dialog that gets the password. When i enter a value and
> click OK it works fine. But when i click Cancel i get a Null Pointer
[quoted text clipped - 4 lines]
> thanks in advance
> Bala

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Paul Lutus - 30 Sep 2004 16:02 GMT

> I have a input dialog that gets the password. When i enter a value and
> click OK it works fine. But when i click Cancel i get a Null Pointer
> Exception. How to handle the Cancel button

Detect the null and deal with it. One way to deal with it is to assume it
meant the user pressed "Cancel".

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Paul Lutus
http://www.arachnoid.com

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How to handle the Cancel button on JOptionPane.showInputDialog

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