This week's book giveaway is in the OCPJP forum. We're giving away four copies of OCA/OCP Java SE 7 Programmer I & II Study Guide and have Kathy Sierra & Bert Bates on-line! See this thread for details.
You need to keep an association between the JLabels and the array indexes. Storing the JLabels in their own array would be easiest. After retrieving the index as I have already shown, you simply retrieve the JLabel and change its text: