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.
For Oracle, you can focus on JDBC or Oracle's equivalent. No need for any "distributed java" stuff that this forum talks about. You can pass about any SQL to the JDBC routines and get answers from the database.