Key Event refusal to recognise backspace

Question

Hello,
I have used a key listener to ensure that the characters entered into a text area are numbers only. to do this i have an if statement to check that the event character is not a number, and is not a delete or backspace
However when run, the backspace characters are not getting caught. print outs show that a blank char is written when e.getKeyChar() is called, 0 is written when e.getKeyCode() is called, and Unknown keyCode: 0x0 is written when e.getKeyText(e.getKeyCode()) is called.
Is there any other way to check for a backspace character?
Thanks for your help! :)

Answer 1

Fillis52 wrote:
..Is there any other way to check for a backspace character?There is of course, the right way. This code works here.
import java.awt.event.*;
import javax.swing.*;
class TestBackSpace {
    public static void main(String[] args) {
        JTextField tf = new JTextField();
        tf.addKeyListener( new KeyListener() {
            public void keyPressed(KeyEvent ke) {
                System.out.println( ke.getKeyCode()==KeyEvent.VK_BACK_SPACE );
            public void keyReleased(KeyEvent ke) {}
            public void keyTyped(KeyEvent ke) {}
        JOptionPane.showMessageDialog(null, tf);
Thanks for your help! :)You might look to post an SSCCE (http://pscode.org/sscce.html) in future, then you will likely get more help.