logo CodeStepByStep logo

Main Page → Exercises → Java → Solve an Exercise

inheritanceMystery2

Language/Type: Java inheritance polymorphism

Assume that the following classes have been defined: 

public class Brienne extends Oberyn {
    public void a() {
        System.out.print("Brienne-a   ");
    }
}

public class Arya {
    public void a() {
        System.out.print("Arya-a   ");
    }

    public void b() {
        a();
        System.out.print("Arya-b   ");
    }

    public String toString() {
        return "Arya";
    }
}

public class Tyrion extends Arya {
    public void a() {
        super.a();
        System.out.print("Tyrion-a   ");
    }
}

public class Oberyn extends Arya {
    public void b() {
        System.out.print("Oberyn-b   ");
        super.b();
    }

    public String toString() {
        return "Oberyn";
    }
}

Given the classes above, what output is produced by the following code? (Since the code loops over the elements of an array of objects, write the output produced as the loop passes over each element of the array separately.) 

Arya[] thrones = { new Oberyn(), new Arya(), new Brienne(), new Tyrion() };
for (int i = 0; i < thrones.length; i++) {
    thrones[i].a();
    System.out.println();
    System.out.println(thrones[i]);
    thrones[i].b();
    System.out.println();
    System.out.println();
}
element 0
element 1
element 2
element 3

You must log in before you can solve this problem.

Log In

Need help?

Stuck on an exercise? Contact your TA or instructor.

If something seems wrong with our site, please

Is there a problem? Contact us.