Beginner module

Module 6: Inheritance and Polymorphism

Learn how related classes can share behavior through inheritance and how polymorphism lets one interface work with many object types.

Module lessons

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Create a subclass that reuses fields and methods from a parent class when there is a true “is-a” relationship.

Change inherited behavior in a subclass while keeping the same method contract as the parent class.

Use one parent type to work with many child objects while Java chooses the correct overridden method at runtime.

Create parent classes that define shared structure and required behavior without allowing direct object creation.

Use interfaces to define a shared capability that many unrelated classes can implement.