2 occupants in a room

Hi community,

not know how they can get two users in a room and they can talk properly, with the same java

with the same java I mean, the 2 users have exactly the same code as if they have the same code.

If you do not have the same code does not work in java.

I have worked with QUICKBLOX.

http://stackoverflow.com/questions/16658663/thread-nullpointerexception-quickblo x-muc-chat

Someone could show me an example please?