Re: Currency Input Validation

From:

Nigel Wade <nmw@ion.le.ac.uk>

Newsgroups:

comp.lang.java.programmer

Date:

Mon, 30 Jul 2007 09:50:53 +0100

Message-ID:

<f8k8pd$9b$1@south.jnrs.ja.net>

Dean wrote:

On Jul 28, 3:19 am, Arne Vajh??j <a...@vajhoej.dk> wrote:

Dean wrote:

On Jul 28, 12:56 am, Arne Vajh??j <a...@vajhoej.dk> wrote:

Dean wrote:

I apologise if this has already been covered.
How would I validate currency input from a JTextField. For example, to
ensure that a currency value was input in a currency format ##.##
instead of ####.
I've tried using matching with regex's but that didnt work very well.
It was able to ensure that the dot (.) was entered but allow more that
2 numbers after the dot.
    private String currencyFormat()
    {
        return "[\\d]+[.][\\d][\\d]";
    }

Try:

"^[ ]*[\\d]+[.][\\d][\\d]$"

I made the change you suggested but unfortunately it still doesn't
work.

Can you give a short working example that shows the problem ?

Arne- Hide quoted text -

- Show quoted text -

Sorry mate, I was being an arse when I ran a test. Your solution works
perfectly. Thanks for your help mate.

You might also want to consider a JFormattedTextField with a MaskFormatter.

There is a page on how to use these together to validate input in the Swing
tutorial:
<http://java.sun.com/docs/books/tutorial/uiswing/components/formattedtextfield.html>

--
Nigel Wade, System Administrator, Space Plasma Physics Group,
University of Leicester, Leicester, LE1 7RH, UK
E-mail : nmw@ion.le.ac.uk
Phone : +44 (0)116 2523548, Fax : +44 (0)116 2523555