Q) What is java?

Java is more than a programming language called as Technology. 
JAVA Mainly three things

1.    Object oriented programming language

2.    Platform

3.    Technology

Java is just a small, simple, secure, portable, object-oriented, interpreted, byte coded, architectural-neutral(platform independent), garbage collected, multithreaded programming language with strongly typed exception handling mechanism for writing distributed, dynamically extensible programs. 

Platform Any hardware or software environment in which a program runs, known as a platform. Since Java has its own Runtime Environment (JRE) and API, it is called platform.

  Ex:

class Simple

{  

    public static void main(String args[]){  

     System.out.println("Hello Java");  

    }  

}