Havok is a robot made for Robocode which was originally designed for a school project. It was written in Java.
You don't actually have to build a .jar file or similar to get this bot going. Simply add your binary path of the project under Options -> Properties -> Development versions in Robocode, then hit refresh. Everytime you compile the project it will automatically load in.
If you use maven the directory is located at YourProtect/target/classes/