I am trying to understand chatter Rest api from months, I have only understood the flow.

Before coding in any new language, we understand the primitive data types, simple hello world example, use of methods, return types etc.

I am good at Java.

My question is to how to use classes of chatter REST api in Java.

Rest api returns information in JSON/XML format, but how to store such a format in Java made grasping difficult for me.

I have already referred salesforce chatter api documentatn a lot, but i found it complete but at very top level( i.e- they have only given classes and code snippets to follow,post,delete etc)

Where can i get an easy tutorial for implementing chatter rest api applications in Java from scratch??