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 have attached a calendar program currently being used in a bigger program. However there is a problem with saving on the component picked. Currently it changes the background colour when the button is clicked but when another square is clicked on then the background colour changes back to normal is there anyway to keep the background colour when another square is clicked on.