I am using Java NetBeans. I want that if a user enters numeric value in text field of "Name", it must show an error using dialog box. How?

Asked Jun 16 '17 at 06:39

Active Jun 16 '17 at 06:48

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I am using Java NetBeans. I want that if a user enters numeric value in text field of "Name", it must show an error using dialog box. How do I do it?

asked Jun 16 '17 at 06:39

DK Devesh

You can use a `DocumentFilter` to perform real time validation or you can use a regular expression to perform post validation – MadProgrammer Jun 16 '17 at 06:44
Welcome to StackOverflow, please read the guides on [How to ask](https://stackoverflow.com/help/asking) in order to understand your question better and provide you with better answers. – Paul Karam Jun 16 '17 at 06:44

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