Question

How do you write the constructor for the three private fields?


public class Student implements Named {
   private Person asPerson;
   private String major;
   private String universityName;

   @Override
   public String name() {
      return asPerson.name();
   }

Answer 1

The constructor can be written as follows. The comments are provided for the better understanding of the logic.

public class Student implements Named {
   private Person asPerson;
   private String major;
   private String universityName;

   //The constructor can be written as follows
   //There should be 3 paramters one each representing the private variable
   public Student(Person asPerson, String major, String universityName) {
           //In the below lines of code "this.asPerson" points to the class level private variable
           //The variable "asPerson" points to the incoming paramter.
           this.asPerson = asPerson;
           this.major = major;
           this.universityName = universityName;
   }

   @Override
   public String name() {
      return asPerson.name();
   }
}

The screenshots of the code is provided below.