vineet kumar chaudhry wrote:I would like to be aware of gamut of Java
Could you please help me out...
Well here might be a good place to start, and this page shows Java running about neck-and-neck with C at the top of the heap.
As to the rest of your questions: Google is your friend. Just remember that anything you read is probably biased (as would most likely be the majority of answers you'll get here), so use your own judgement.
Isn't it funny how there's always time and money enough to do it WRONG?
vineet kumar chaudhry wrote:Will Real Time Java be a boom or is it only the web which is earning revenue for java i.e (web is the only sector where it is widely used)
That's a false choice. Java is also used in application servers handling non-UI tasks, and as the backend (not to mention frontend) of desktop apps, in addition to web apps. Real-time Java has limited applications, but then, just about any language's real-time applications are limited :-)