Chapter 7. Members Inheritance and Polymorphism
In this chapter, we will learn about one of the most exciting features of object-oriented programming in Java 9: polymorphism. We will code many classes and then we will work with their instances in JShell to understand how objects can take many different forms. We will:
- Create concrete classes that inherit from abstract superclasses
- Work with instances of subclasses
- Understand polymorphism
- Control whether subclasses can or cannot override members
- Control whether classes can be subclassed
- Use methods that perform operations with instances of different subclasses
