Right .. as languages, Java seems like an extension of C++, with a few minor-to-moderate differences (like Java's lack of pointers). The main difference seems to be that in C++, object-oriented design/development was optional, but in Java it's pretty much required. You'll certainly get a LOT more out of Java if you use good OO principles.
Just installed Motodev myself, and started reading the Droid developer reference materials. Moto seems to have done a good job bundling everything with Eclipse.