Question

Let’s say I have two objects, A and B where..

Object A=new Object();
Object B=A;

These objects by default each have two ints: int X and int Y. First, in both A and B,

(X == 0) && (Y == 0)

So, you would say those two are equal, as would Java. Now, let’s say we change A.X so that A.X=2. Now, A and B are no longer equal since

A.X==2

..but..

B.X==0

Java, however, still says they are equal.

(A.equals(B)) == true
(B.equals(A)) == true

So, how do you get around that?

Answer 1

By doing this Object B=A;, you are not creating a new object, but B is pointing to A only. So its only one object.

So when you change A.X = 2, B.X is also 2 at its referring the same variable and hence equal.

You may verify this by printing B.X value.