[s-taylor]

System.out will go to the console.
There is a view you can add in Eclipse that will display the RoboRio console in the same frame area that the compilation logs show up. In eclipse, it's window->show view -> other... -> Riolog. Works great, as long as the compilation laptop is connected to the robot. I have found that sometimes the connection is broken and re-deploying the program to the robot gets the console connection back.

"New for 2016" they also shunt the system.out to the DriverStation console window for you... but I have determined over time that not all messages actually end up there-- it seems that if there is enough output flowing in, it gets overwhelmed and drops messages. Thus, if you are printing a value every command iteration (20ms) don't expect to see everything show up cleanly on the DS. It works for the most part for occasional messages (like invoking a command, or reporting an error condition).