Inheritance (Multi-Level Hierarchies)

Objective

Students must create class hierarchies with 2+ levels of inheritance to demonstrate understanding of inheritance chains.

Evidence

Multi-level class hierarchy demonstrated:

• Ghost extends Enemy (base game engine class)
• DeathBarrier extends Barrier (base game engine class)
• SpriteSheetCoin extends Coin (base game engine class)

Implementation Details

• Each custom class extends a game engine base class
• Base classes provide core functionality (position, velocity, rendering)
• Custom classes add specialized behavior
• Demonstrates proper use of inheritance to reduce code duplication

Key Concepts

• Inheritance hierarchy (parent → child)
• Code reuse through inheritance
• Specialization of generic base classes
• The extends keyword