Question

2 Lab5 - Compatibility Mode - Saved to my Mac View Tell me jout References Mailings Review A Аа C 21 पा daBbCode AaBbCcDc AaBbCcDe AaBb CcD ABCDdF Emphasis Heading 1 Heading 2 Heading Heading ANA- Objectives: In this lab, the following topics will be covered 1. Inheritance in Java), 2. Overriding, and Hiding Inheritance (in Java): Inheritance is an important object-oriented concept that allows classes to be reused in order to define similar, but distinct, classes. In this lab we walk through the development of a class hierarchy and a program that makes use of several classes in the hierarchy. We begin by looking at an example of inheritance hierarchy Student Name Id RA Nams BAGDAD Bild SND pinto Graduate Undergrad year ssato RYANTO prini) thesis Thesis Title Rhesis Title The class Student is the parent class. Note that all the variables are private and hence the child classes can only use them through accessor and mutator methods. Also use overloaded constructors. nglish (United States) Focus MacBook Pro

Answer 1

Below are the Undergrad.java and Graduate.java class that extends from the Student.java class. Instance variables are marked as private and constructors are overloaded in both the derived classes.

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public class  Undergrad extends Student{
    
    private int year;

    public Undergrad(int id, String name, double gpa) {
        super(id, name, gpa);
        year = 2020;
    }

    public Undergrad(int id, String name, double gpa, int year) {
        super(id, name, gpa);
        this.year = year;
    }

    public int getYear() {
        return year;
    }

    public void setYear(int year) {
        this.year = year;
    }
    
    // override the print method
    public void print(){
        super.print();
        System.out.println("Year: "+getYear());
    }
}


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public class Graduate extends Student{
    
    private String thesisTitle;

    public Graduate(int id, String name, double gpa) {
        super(id, name, gpa);
        thesisTitle = "";
    }

    public Graduate(int id, String name, double gpa, String thesisTitle) {
        super(id, name, gpa);
        this.thesisTitle = thesisTitle;
    }

    public String getThesisTitle() {
        return thesisTitle;
    }

    public void setThesisTitle(String thesisTitle) {
        this.thesisTitle = thesisTitle;
    }

         // override the print method
    public void print() {
        super.print();
        System.out.println("Thesis title: "+ thesisTitle);
    }
}

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