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Homework Help: Determining which method shows polymorphism

  1. Feb 3, 2015 #1
    1. The problem statement, all variables and given/known data

    Which of them is an example of polymorphism?
    Code (Text):
    public Class D extends B

    public void f()
        this.g(); // 1

    public void g()
        super.g(); // 2

    2. Relevant equations

    Polymorphism: The ability of an object to refer to objects of other types. The ability of a method to have different functionalities, depending on the class type invoking it.

    3. The attempt at a solution

    This was what I understood to be my teacher's logic:

    Imagine a class E that extends B
    The class also rewrites method g().

    Code (Text):
    public static void main(String[]args)

    E e = new E ();
    D d = new D ();

    e.f(); // calls the overriden g() method in E
    d.f(); // cals the g() method in D, which calls the g() method in B

    I can understand why method f() shows polymorphism via this example. How is method g() not an
    instance of polymorphism though?
    Last edited: Feb 3, 2015
  2. jcsd
  3. Feb 4, 2015 #2


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