Set a property name based on instance name in java

I have a class like this (which I am developing)-

public class Comp { private String name; }

It is used in some other classes(which will be used by others and not in my control), like this

Comp username; 
Comp password;

What I want is, to set the name of the Comp object automatically same as the name of the instance created. That is in my case, it should return like this -

username.getName() -> "username"
password.getName() -> "password"

I need to do this on my side(that is, in the Comp class). Is this possible to achieve ?