This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
I don't have OS X but this is what I would try:
edit Constructing a JSpinner.NumberEditor for jSpinnerQuantity doesn't automagically set the editor to the spinner. You would have to use setEditor(...) for that to happen.
There are no new questions, but there may be new answers.