Using Oracle's Java Documentation as a Teaching Tool
One obvious benefit, which is really a good goal in and of itself, is that students get used to utilizing documentation.  Many students don't use the internet as a resource at all, and those that do often wind up on StackOverflow.  It has been my experience that the very basic searches that those students often perform wind up at SO pages that are rather too complex.  If they want to know how to find a subset of a String in Java, the Oracle documentation is really a better place to begin than Google.

Being able to read and understand documentation gives them a powerful research tool that they can utilize for future explorations.