How to check manual edits on a JSpinner field using DefaultEditor approach

Question

I am adapting code from here:

Value Change Listener to JTextField

EDIT 2

The following code gives me an infinite loop of dialogs when I press the up spin

Answer 1

Custom DocumentListeners and formattedTextField don't play nicely with each other, better don't mix. Instead, use a PropertyChangeListener on the text field that listens for changes of its editValid property: whenever that changes to false, you could notify the users

field.addPropertyChangeListener(new PropertyChangeListener() {

    @Override
    public void propertyChange(PropertyChangeEvent evt) {
        LOG.info("" + evt);
        if ("editValid".equals(evt.getPropertyName()) 
            &&  Boolean.FALSE.equals(evt.getNewValue())) {
          SpinnerNumberModel model = (SpinnerNumberModel) spin2.getModel();  
          JOptionPane.showMessageDialog(null,
          "Error: Number must be in range [" + model.getMinimum() + " ..." + model.getMaximum() + "]",
           "Error Massage",
          JOptionPane.ERROR_MESSAGE);

        }

    }
});

BTW, personally, I agree with Mad - such an intrusive notification tends to annoy me and maybe your users as well ..