Hi,

I'm trying to extend the JTextField class to a JNumField subclass in
which only numeric key-in would be accepted.
This is probably a very common problem, but I could not find a simple
solution to it yet.

I tried with a MaskFormatter, as explained here (see pjstroh's
message) but encountered problems when trying to compile the code.
http://forum.java.sun.com/thread.jspa?t ... ID=1876495

So, I tried somehting different by checking the keyTyped key event.
But this does not work. Does someone know why ?

Here's some code from my JNumField class:

Thanks for any help.

Solved. The problem was that I adding the key listener from within the
init() function which is -I assume- called only for applets.
As my class is not an applet, the init() function was not called.
I can now catch key events as I moved addKeyListener(this) in the
class constructor.