Java :Setter Getter and constructor

Question

I\'m a bit confused about the use of getter/setters and constructors (see the below code for an example)

    public class ExampleClass {

        private in         


        

Answer 1

this is purely upto your coding style. But IMO, I would use parametrized constructor:

1. to initialize those values which should not be changed. (like username parameter for a person object)

2. to initialize those values, without setting which, the object will be in invalid state.

Say, you are sending login parameters to a method. You can use in these to ways

Login obj = new Login();
obj.setUsername("user");
obj.setPassword("pw")// what if someone commented this out, or you forget to call it


and otherway,
Login obj = new Login("user", "pw");

while you can send Login object just after setting username in 1st case, it would be invalid at recieving end. but the second method is less prone to bugs, bcz it becomes necessary to pass all the required parameters.