Immutable and pass by value

Question

I have the following code which has
a mutable Person class, String and a method to modify the instances of String and Person

    class Person{

int a = 8         


        

Answer 1

Sometimes people get confused when passing by reference. It's possible to change the object that the reference refers to (giving the impression of pass-by-reference), but it is not possible to modify reference itself. So it still remains pass-by-value.