Linux ps Output Format Spec

Question

I am using Java API to connect my Remote Machine so I can see the running processes.

One of the requirements is to be able to kill any of the processes.

Now I am executing command

ps aux | grep java which return list of the running processes.

eg.

root       330  0.2  0.0     0    0 pts/0    Z    08:42   0:11 [java] 

Does anyone know what is the spec is used for above output ? I'll need to convert above line into an object where 330 will the process id.