JtextField - only numerical input

[thesti]

hi,

i wonder a way to validate a JTextField to only receive numerical input. i've tried with the KeyListener and consumer() but it doesn't work. i've tried InputVerifier but it also doesn't work, maybe that because i don't really understand how inputVerifier works.

is there another way?
thx

[N002199B]

hi,

i wonder a way to validate a JTextField to only receive numerical input. i've tried with the KeyListener and consumer() but it doesn't work. i've tried InputVerifier but it also doesn't work, maybe that because i don't really understand how inputVerifier works.

is there another way?
thx

Are you using a rich application or a web application? Web applications can be handled via some javascript

[heat84]

you can get the character and then check if its non-numeric , if not , you call consume(). e.g

char c=ke.getKeyChar();
if(!Character.isDigit(c)){
ke.consume(); // ignore the input
}

[thesti]

hi,

no it's not a web app.
and yes i've tried consume(); but still the char appear in te textfield. here's the code of my action key listener

private class ValueKeyListener extends KeyAdapter{
        public void keyPressed(KeyEvent e){
 
            if(e.getKeyCode() < KeyEvent.VK_1 && e.getKeyCode() > KeyEvent.VK_9){                
                e.consume();
            }
        }
    }
 

[JosAH]

Don't use low level KeyEvents for that, e.g. a paste operation (a ^V gesture) ruins
that entire little scenario. Use a JFormattedTextField instead (read the API
documentation).

kind regards,

Jos