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.
private variables of an object, can't be accessed directly neither by an object of the same class nor different class. Outside world can get access to the private variables of an object using only the non-private methods of that class.