Hi,

I have the following code which complains with 'Cannot refer to a
non-final variable controlPanel inside an inner class defined in a
different method':

private void addPanelListeners(PanelAddRemove controlPanel) {
  controlPanel.getPrintButton().setText("Move up");
  controlPanel.getPreviewButton().setText("Move down");
  controlPanel.getPrintButton().addActionListener(new
MenuActionListener(frame) {
     public void actionExecuted(ActionEvent e) throws Exception {
       int position = controlPanel.getSelectedIndex();
     }
  });
}

If however I change the parameter to be final

private void addPanelListeners(final PanelAddRemove controlPanel) {

it no longer complains.  I must confess I used to create a private
variable in the class as a work around which worked but was ugly.  Now
are there any detrimental side effects to making the object final - I
assume it means dont point controlPanel to another value - but
otherwise it is fine?

thanks

Aron