object a = object b; what happens to object a?

Question

One of my professor has given us a few practice questions for an exam, and one of the questions is something like the below (psuedocode):

a.setColor(blue);
b         


        

Answer 1

The important thing to realize is, after the line a = b, you don't have two objects anymore. You have two variables, both referring to the same object. So when you change that object's color, both variables reflect it. the line b = a actually doesn't do anything.