What is the difference between an Object , Reference ID , and Reference Variable in Java?

Question

What is difference between the following in java :

1. Object

2. Reference ID

3. Reference Variable

When I see sta

Answer 1

Emp e

This statement creates a reference variable 'e' in the stack.

    new Emp()

This statement creates an object in the heap. An object is just a buffer or we can say "a chunk of memory". Hence , a buffer gets reserved in the heap. Thus the statement,

   Emp e=new Emp() 

passes the reference id of that object created in the heap to the reference variable 'e'.