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.
Welcome to the JavaRanch. As with all things in software, the answer is "it depends". What kind of game are you writing? What platform is it targeted for? Are there better language options out there? There's a forum here for discussing Java game development. Have a browse.