Java Development Tools

I just went to a training class 'Jdeveloper ADF BC for 4GL Form,' and thought it would be the best to get a training from the source. I expected that some of ADF BC API would be covered. But, honestly I'm very disappointed with the instructor who didn't know much about any topics but the pre-made powerpoint slides. Everything other than slides was so subjectively and poorly explained, and none of my questions were clearly answered. For example, processScope and code snippet copied into customized methods in application module weren't explained at all. It would be nice if any of your developers could teach us yourself. I feel very bad that my company had to pay all those tuition and travel expenses for something like this. I wouldn't waste my 4-day time go to this class if it was even for a quater of the price locally.

I just don't know where else I can learn quicker than browsing all the posts here.

Thanks!