[Bryan Herbst]

In FRC, most of the differences between the two languages are irrelevant. Both languages can accomplish anything you want to do in FRC. Unless you are doing some particularly intense programming, efficiency shouldn't be a concern.

As drakesword said, it should come down to what language you and your team are more comfortable with. If you want to learn a different language during the off season, go ahead. During build season you should stick to what you know.

That being said, java and C++ have very similar syntax, as you will find many high-level languages do. The key difference you will run into in FRC is that C++ uses pointers, whereas java does not.