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What if the entered character into the textfield is other than the letter
and digit,
something like 'backspace' key or '\' key will not be consumed.

Thanks
Thulasi

Andrew Bennett [ Inprise ] wrote:

> Thulasi Kalahasti wrote:
> >
> > How can I restrict the number of characters that can be entered for a
> > textfield.
> > Say I don't want the user to enter more than 8 characters into a
> > textfield, how do you I do that?
> > I tried setSize() and setColumns() methods, but they don't work.
> > Anyone could you please help me.
>
> Check the API.  setColumns() doesn't do what you think it does.
>
> Try this approach for a KeyHandler.
>
> init or some place:
>
>     textArea1.addKeyListener(new KeyEventHandler());
>
> class KeyEventHandler extends KeyAdapter {
>   public void keyPressed(KeyEvent evt) {
>     char c = evt.getKeyChar();
>     if ((((TextComponent)evt.getComponent()).getText().length() >= 5))
>
>       if (((Character.isDigit(c)) | (Character.isLetter(c))))
>         evt.consume();  // eat it if it's a character or number
>   }
>
> }
>
> This will restrict the field to 5 characters.
>
> Andrew
> --
>   Andrew Bennett
>   abennett@inprise.com
>
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