Head_First_Design_Patterns.pdf (英文版)

x

Intro

Your brain on Design Patterns. Here you are trying to learn something, while

here your brain is doing you a favor by making sure the learning doesn’t stick. Your brain’s

thinking, “Better leave room for more important things, like which wild animals to avoid and

whether naked snowboarding is a bad idea.” So how do you trick your brain into thinking

that your life depends on knowing Design Patterns?

Who is this book for? xxvi

We know what your brain is thinking xxvii

1 Welcome to Design Patterns: an introduction 1

2 Keeping your Objects in the know: the Observer Pattern 37

3 Decorating Objects: the Decorator Pattern 79

4 Baking with OO goodness: the Factory Pattern 109

5 One of a Kind Objects: the Singleton Pattern 169

6 Encapsulating Invocation: the Command Pattern 191

7 Being Adaptive: the Adapter and Facade Patterns 235

8 Encapsulating Algorithms: theTemplate Method Pattern 275

9 Well-managed Collections: the Iterator and Composite Patterns 315

10 The State of Things: the State Pattern 385

table of contents

xi

1

Welcome to Design Patterns

Someone has already solved your problems. In this chapter,

Encapsulated quack behavior

Client

b

xii

2

Keeping your Objects in the Know

Don’t miss out when something interesting happens!

c

xiii

3

Decorating Objects

Just call this chapter “Design Eye for the Inheritance

Welcome to Starbuzz Coffee 80

The Open-Closed Principle 8

6

Meet the Decorator Pattern 88

Writing the Starbuzz code 95

Real World Decorators: Java I/O 10

Writing your own Java I/O Decorator 10

Tools for your Design Toolbox 10

Exercise Solutions 1

06

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4

Baking with OO Goodness

Get ready to cook some loosely coupled OO designs.