Contents
Preface
Acknowledgments
Introduction

Chapter 1. The API

• Guideline: Focus on interface, not implementation.
• Guideline: Design for the user, not for yourself.
• Guideline: Keep methods, objects, and packages focused.
• Guideline: Design to prevent client mistakes.
• Guideline: What to leave in, what to leave out.
• Guideline: Make common things easy, rare things possible.
• Guideline: Make the semantic contract as explicit as possible.
• Guideline: Make sure subtypes fulfill the semantic contracts of their supertypes.
• Guideline: Avoid optional clauses in semantic contracts.

Chapter 2. Classes, Inheritance, and Composition

• Guideline 9: Use classes primarily to serve as blueprints for objects.
• Guideline 10: Use concrete classes to say "What objects are."
• Guideline 11: Use composition enlist the help of other objects.
• Guideline 12: Use class extension to model permanent IS-A relationships.
• Guideline 13: Understand the difference between inheritance and composition.

Chapter 3. interfaces and Abstract Classes

• Guideline 14: Appreciate the significance of the interface.
• Guideline 15: Use interfaces to define large families or to say "What objects can do."
• Guideline 16: Use interface extension to decouple services or restrict the semantic contract.
• Guideline 17: Consider creating convenience implementations of your interfaces.
• Guideline 18: Use abstract classes to provide default behavior or establish a small family.

Chapter 4. Design Patterns

• Guideline 19: Understand the role of intent in design patterns.
• Guideline 20: Use Decorators to avoid hierarchy explosion.
• Guideline 21: Use Proxies to control access to objects.
• Guideline 22: Use Iterators to provide access to the elements of a collection.
• Guideline 23: Use Chain of Responsibility to delegate along a linked list of objects.
• Guideline 24: Use Strategies to pass algorithms to objects.
• Guideline 25: Use Commands to pass requests to objects.
• Guideline 26: Use Event Generators for asynchronous notification.
• Guideline 27: Use the Composite Pattern to treat objects and collections uniformly.
• Guideline 28: Use Factories to delegate the production of objects.
• Guideline 29: Use Template Methods to delegate to subclasses.