FAQ: Inheritance and Polymorphism - Child Classes in Method Parameters

Frequently Asked Questions Java FAQ
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This community-built FAQ covers the “Child Classes in Method Parameters” exercise from the lesson “Inheritance and Polymorphism”.

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This exercise can be found in the following Codecademy content:

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FAQs on the exercise Child Classes in Method Parameters

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why should tellStory method be a static one ? As far as i know static methods doesn t support non static variable field … in this case “monster.name”

3

Hi,
How do you know that monster.name is static? We don’t have that class described in this chapter, do we?

4

Hello,
In the exercise of the Child Classes in Method Parameters chapter, we need to do this in main()

  Noodle ramen, pho;
    ramen = new Ramen();
    pho = new Pho();
    
    NoodleRestaurant customer1 = new NoodleRestaurant("Sagirah");
    NoodleRestaurant customer2 = new NoodleRestaurant("Maritza");

    // Add your code here
  customer1.order(pho);
  customer2.order(ramen);

Why do we need to set the type Noodle? Doing the code below seems to work:

    Ramen ramen = new Ramen();
    Pho pho = new Pho();
    
    NoodleRestaurant customer1 = new NoodleRestaurant("Sagirah");
    NoodleRestaurant customer2 = new NoodleRestaurant("Maritza");

    // Add your code here
  customer1.order(pho);
  customer2.order(ramen);

Thank you!

5

Yeah, i don’t think it matters that much. In the first example you’re setting the type to it’s super class, and in the second example you’re being a bit more specific with the type.