urgent help needed

[nuru]

Where can I find a textual description of the Java programming setup
of the FRC project? i.e., an English language description of the physical system
and its association with Java classes and methods. e.g., I encounter
source code referring to (say) joystick and jaguar --- how do I know
how the Java class jaguar relates to a physical entity in the robot's
world (Is a jaguar the java counterpart of the physical arm of the robot
or of a certain motor that drives the robot)?
I am confused -- I think I am asking for something like the 10-page
textual description (published by APcentral) of the "Gridworld"
case study in AP Computer sc. I do know where to find the Java source
code of the project and I have read the "Getting started with Java
for FRC" manual from WPI and the "Getting started with the 2012 FRC control system" manual. Also I know how to code in Java.

I need your urgent help, please.
Thank you for any pointers.