Difference between creating a “new object” and “Class objectname”

Question

Say for example I have a class called Phone.

What is the difference between:

Phone p;

and

Phone p = new Phone(200)          


        

Answer 1

Phone p is a reference to a Phone object which has not been initialised.

Phone p = new Phone(200) is a reference to a Phone object which has been initised with the constructor Phone(int var).

new Phone(200) creates a new Phone object with the constructor Phone(int var).