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

I just made a program for displaying reference ID of an object.

class abc
{

   int a=10;
   int b;
}

class t extends abc
{

   public static void main(String args[])
   {
     abc A=new abc();
     System.out.println(""+A);
   }
}

output : shockingly a hex string :

"abc@52e922"

Java maps the actual location of an object at a separate place in form of a hex string which is known as reference ID. It never displays actual location of it's object stored in the memory.