java - JSpinner Value change Events

Question

How to make the update immediately when the jSpinner value was changed.

ChangeListener listener = new ChangeListener() {
  public void stateChanged(ChangeEvent e) {
    jLabel.setText(e.getSource());
  }
};

spinner1.addChangeListener(listener);

The code above doesnt change the label text automatically, it required you to click again anyplace to update.

question from:https://stackoverflow.com/questions/3949382/jspinner-value-change-events

Answer 1

The answer is to configure the formatter used in the JFormattedTextField which is a child of the spinner's editor:

    formatter.setCommitsOnValidEdit(true);

Unfortunately, getting one's hand on it is as long and dirty as the introductory sentence:

    final JSpinner spinner = new JSpinner();
    JComponent comp = spinner.getEditor();
    JFormattedTextField field = (JFormattedTextField) comp.getComponent(0);
    DefaultFormatter formatter = (DefaultFormatter) field.getFormatter();
    formatter.setCommitsOnValidEdit(true);
    spinner.addChangeListener(new ChangeListener() {

        @Override
        public void stateChanged(ChangeEvent e) {
            LOG.info("value changed: " + spinner.getValue());
        }
    });

A slightly (but not by much) cleaner way might be to subclass NumberEditor and expose a method which allows the config