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.
They were just talking about an objects size in Beginner yesterday. You might try using the search link at under the two buttons above. There have been LOTS of conversations on this topic in Beginner as well as Intermediate.
"JavaRanch, where the deer and the Certified play" - David O'Meara