Hi,
Still i can see some classes like serverconnection, servercontext..etc in the javadoc. I think these classes cannot be used in 10.1 server as per the new ArcGIS Server architecture.
I found one more interesting point.
I installed eclipse plugin for Arcobjects. Still it is giving old style of connecting to server code snippet.
It is the same case with ArcGIS SOAP API for Java also.
I was unable to get the reference for AOSerializerUtil class available in wsruntime.util.