Mjsip startup problem

Hi i am new to SIP.I am intrested in learning about it.I am trying to use mjua_1.6 to have an audio conversation between two user agents in the same network.

My problem is that, i am not provided with a proper TODO list to communicate between two UA. the querys are as follows:-

1.In what version of JDK will this mjua_1.6 run.
2.what are the things to be done to communicate between two UA in the same network.
3.is it possible to call between two PC’s in a network.