What is JAVA?

Java is a programming language which provides us a platform to develop.

Now comes in mind, what is platform. Platform is the combination of hardware & software on which a program runs.

In real world, when we listen about platform the first thing which comes in mind is always a Railway Platform. What are the things which a railway platform needs? Like Shelter, Desk and most important railway line to run train. In java world, also needs something to build a platform and run the programs and these are hardware & JRE (Java Runtime Environment).

As traditionally there are two types of java which are Core Java & Advance Java.  But in Java world there are three types of java which are:

S No.	Java World	Traditional World
1)	J2SE (Java2 Standard Edition)	Core Java
2)	J2EE (Java2 Enterprise Edition)	Advance  Java
3)	J2ME (Java2 Micro Edition)	Mobile Edition

Now, Question is raised why we use always 2 with the name Java as in present the latest version is something else. 2 nothing but known as the generation not as version.