11. Animal
Animal and CarnivoreAnimal.
11. Classes
Interfaces and abstract classes.
Additional resources
- The Java Tutorials have a discussion of abstract classes vs interfaces.
Contents
11. Candy
Food interface, Candy class, ComboCandy subclass.
11. Inheritance 1
Animal. Dog. Cat. Borzoi. Boxer. Abstract example: A, B, C.
11. Inheritance 2
Noisy, Colorable, Cat, RandomCat. Practice with classes, abstract classes, and interfaces.
Abstract Classes
When are abstract classes useful? A discussion of a few examples.
Interfaces
Concrete examples of interfaces.
11. AQuiz IAnswers
A quiz asking you to write an interface, an abstract class, and more.
11. Inheritance Calls I
Approaching AP MCQ-type problems by thinking about functions.
11. Inheritance Calls II
When a method is overridden, it can be tricky to figure out which method is called. We give an example to show why it is not possible to call the non-overriden method.