When confronted with a new API I often google for "java something tutorial" and almost always get a hit at Sun and a few others from university courses. Do you have particular areas you want to study? Or just a running start at the language? Thinking In Java referenced above is very readable. The "Head First" books are good, too, and some of the authors hang out here.
A good question is never answered. It is not a bolt to be tightened into place but a seed to be planted and to bear more seed toward the hope of greening the landscape of the idea. John Ciardi