Java KeyListener not firing on JSpinner

Question

Hi, have tried a few different approaches to this but with no success so far. Just wondered if I'm missing anything. I have a JSpinner which is a component of a DateSelector widget alongside a Calendar. I am trying to fire a validation method if the user changes any text in the JSpinner instead of using the Calendar control or the JSpinner up and down arrows.

Here are the different approaches I have tried:

jSpinner1.addKeyListener(kl);

jSpinner1.getEditor().addKeyListener(kl);

((JSpinner.DefaultEditor) jSpinner1.getEditor().getTextField().addKeyListener(kl);

Anyone out there got any ideas as to what I'm doing wrong? Thanks

UPDATE Apologies, I should have said that I have already added a ChangeListener to the JSpinnerDateModel which is attached to the JSpinner. Like so:

ChangeListener changeListener = new ChangeListener() {
        @Override
        public void stateChanged(ChangeEvent e) {
            dateChanged();
        }
    };

    jSpinnerDateModel.addChangeListener(changeListener);

    KeyListener keyListener = new KeyListener() {

        @Override
        public void keyTyped(KeyEvent e) {
            // TODO Auto-generated method stub

        }

        @Override
        public void keyPressed(KeyEvent e) {
            System.out.println(e.getKeyChar());
            dateChanged();
        }

        @Override
        public void keyReleased(KeyEvent e) {
            // TODO Auto-generated method stub

        }

    };
    ((JSpinner.DefaultEditor) jSpinner1.getEditor()).getTextField().addKeyListener(
            keyListener);

Thanks

Frank

Answer 1

If you want to disable keyboard editing do this:

JFormattedTextField tf = ((JSpinner.DefaultEditor)spinner.getEditor()).getTextField();
tf.setEditable(false);

To listen for key events you need to add a listener to the text field. This works for me:

((JSpinner.DefaultEditor)spinner.getEditor()).getTextField().addKeyListener(new KeyListener(){

            @Override
            public void keyPressed(KeyEvent e) {                    
            }

            @Override
            public void keyReleased(KeyEvent e) {
                System.out.println("PRESSED!");                    
            }

            @Override
            public void keyTyped(KeyEvent e) {                    
            }

        });

Answer 2

JSpinners handle KeyEvents themselves, but they fire ChangeEvents to the outside world. Adding a ChangeListener should allow you to perform the validation you wish.

See also: Detecting Spinner Value Changes (Java Tutorials)