Allow only numbers?

[Nebojsa Karan]

I have one question.

How to allow only numbers to enter in text box and forbid letters and other non-numeric characters?

[David Newton]

What kind of text box? Swing? If so, I'll move it to the appropriate forum. HTML? If so, I'll move it to another different appropriate forum. If HTML, are you using a framework? If so, I'll move it to possibly yet another different appropriate forum. Using JavaScript?

[Nebojsa Karan]

Swing

[Devaka Cooray]

Welcome to JavaRanch, Nebojsa

As far as I know there is no single method to do that.
You may do it by handling the user input - just have a look at this example.

[Rob Camick]

The above example is an old example.

Use either a JFormattedTextField or add a DocumentFilter to the Document.

More information about both options can be found in the Swing tutorial.

[Devaka Cooray]

Rob Camick wrote:Use either a JFormattedTextField or add a DocumentFilter to the Document.

Something I never used. Great