This week's book giveaways are in the iOS and Features new in Java 8 forums. We're giving away four copies each of Barcodes with iOS: Bringing together the digital and physical worlds and Core Java for the Impatient and have the authors on-line! See this thread and this one for details.
There are zillions of places that you can get source code. When you download the SDK you get the source in a file called src.zip. For applets try javaboutique.com. For J2EE Sun provides the PetStore application source. The Jakarta project is all open source. SourceForge is all open source. etc
"JavaRanch, where the deer and the Certified play" - David O'Meara