Atan is an interface to the 2D Soccer Server of Robocup's simulation league. It should allow you to concentrate on the job of controlling your clients without worrying about all the behind the scenes stuff between SServer and the clients.
Atan is an easy to use Java library designed to get you started with your first Robocup team.
Atan sorts all this out for you! Connecting to the RoboCup SServer couldn't be easier.
Atan uses JavaCC to parse all the information from the RoboCup SServer and turn this into something easy to understand.
Atan provides you with a way to access the RoboCup SServer API using simple method calls.