JSON-LD Java implementation example

Hello,

I am new to JSON-LD and Java implementation, but I tried to follow
instructions at https://github.com/tristan/jsonld-java, and managed to
setup everything up and running.
I would appreciate if someone could provide an example of json document
parsing. Actually, what I need is to parse existing JSON-LD document and to
generate Java object(s). I don't want to add triples to Jena nor Sesame,
but just to generate simple objects.

Thank you!
Srecko