Introduction to Object Oriented Programming

Timothy A. Budd

Chapter 7

Inheritance

Outline

1. Motivation for Inheritance
2. Tension between Generality and Specialization
3. Abstract idea of Inheritance
4. Practical Meaning of Inheritance
5. The Is-a and Has-a rules
6. Idealized Image of Inheritance
7. Subclass, Subtype and Substitutability
8. Forms of Inheritance
   1. Heuristics for Subclassing - Specialization
   2. Heuristics for Subclassing - Specification
   3. Heuristics for Subclassing - Construction
   4. Heuristics for Subclassing - Generalization or Extension
   5. Heuristics for Subclassing - Limitation
   6. Heuristics for Subclassing - Variance
   7. Summary of Forms of Inheritance
9. Trees versus Forests
10. A Portion of the Little Smalltalk Hierarchy
11. Benefits of Inheritance
12. The Costs of Inheritance

Other Material

• Self Assessment Study Guide
• A more Java-centric view of this material.

Intro OOP, Chapter 7, Slide 1