Please help me developers & fixers because I am a beginner of JSON technology
Well... Here is not much about JSON. And it is not a technology, just data format. You can use jackson library to parse it.
so I am unable to do any development
I'm sorry to say that, but you probably either should learn "any development" or try to change your profession.
If you have troubles with java itself, try books by Schildt or Horstmann - or courses at mooc.fi...
Please give me the correct codes for developing this application because I am a beginner in Java application
You mean, to do your work for you?
I'm afraid there would be not many volunteers moreover that you provided quite insufficient data.
No one is helping me in my company.
Please, avoid blaming your colleagues. This never makes good impression about you.
Please describe about the procedure & coding developers.
Create two applications. One should send HTTP requests, another should listen and respond to them. Googling by "java make http request" will provide you with many examples.
Then you'll need to extract header - I do not understand whether you mean specific HTTP header, or just some logic header in your message. You may use jackson as I told above.
Then simply perform shift of characters by given value... It sounds more like a simple school task, so I do not think it would be hard.