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.
JavaBeans won't improve the speed of your SQL. You'll use them to store the db records (usually one bean per record), and arrange them a convenient way for you to retrieve them. For example, using a primary key as the key of a Map.