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.
Object, class from which all other java objects are subclassed
Java object, general name for any Java object
JavaBean, a Java object that follows a prescribed pattern that makes it easy to create and instrospect
POJO, plain old Java object (to differentiate it from specialized Java objects such as EJB's)