Preface Acknowledgments Section 1 What Are Design Patterns? Chapter 1 Introduction Defining Design Patterns The Learning Process Studying Design Patterns Notes on Object-Oriented Approaches The Java Foundation Classes Java Design Patterns Chapter 2 UML Diagrams Inheritance Interfaces Composition Annotation JVISION UML Diagrams Visual SlickEdit Project Files Section 2 Creational Patterns Chapter 3 The Factory Pattern How a Factory Works Sample Code The Two Subclasses Building the Simple Factory Factory Patterns in Math Computation Thought Questions Programs on the CD-ROM Chapter 4 The Factory Method The Swimmer Class The Event Classes Straight Seeding Our Seeding Program Other Factories When to Use a Factory Method Thought Question Programs on the CD-ROM Chapter 5 The Abstract Factory Pattern A GardenMaker Factory How the User Interface Works Adding More Classes Consequences of the Abstract Factory Pattern Thought Question Programs on the CD-ROM Chapter 6 The Singleton Pattern Creating a Singleton Using a Static Method Exceptions and Instances Throwing an Exception Creating an Instance of the Class Providing a Global Point of Access to a Singleton Pattern The javax.comm Package as a Singleton Other Consequences of the Singleton Pattern Thought Question Programs on the CD-ROM Chapter 7 The Builder Pattern An Investment Tracker Calling the Builders The List Box Builder The Check Box Builder Consequences of the Builder Pattern Thought Questions Programs on the CD-ROM Chapter 8 The Prototype Pattern Cloning in Java Using the Prototype Using the Prototype Pattern Prototype Managers Cloning Using Serialization Consequences of the Prototype Pattern Thought Question Programs on the CD-ROM Summary of Creational Patterns Section 3 Structural Patterns Chapter 9 The Adapter Pattern Moving Data between Lists Using the JFC JList Class Two-Way Adapters Pluggable Adapters Adapters in Java Thought Question Programs on the CD-ROM Chapter 10 The Bridge Pattern The Class Diagram Extending the Bridge Java Beans as Bridges Consequences of the Bridge Pattern Thought Question Programs on the CD-ROM Chapter 11 The Composite Pattern An Implementation of a Composite Computing Salaries The Employee Classes The Boss Class Building the Employee Tree Self-Promotion Doubly Linked List Consequences of the Composite Pattern A Simple Composite Composites in Java Other Implementation Issues Thought Questions Programs on the CD-ROM Chapter 12 The Decorator Pattern Decorating a CoolButton Using a Decorator The Class Diagram Decorating Borders in Java Nonvisual Decorators Decorators, Adapters, and Composites Consequences of the Decorator Pattern Thought Questions Programs on the CD-ROM Chapter 13 The Facade Pattern Building the Facade Classes Consequences of the Facade Pattern Notes on Installing and Running the dbFrame Program Thought Question Programs on the CD-ROM Chapter 14 The FI)weight Pattern Discussion Example Code Flyweight Uses in Java Sharable Objects Copy-on-Write Objects Thought Question Programs on the CD-ROM Chapter 15 The Proxy Pattern Sample Code Copy-on-Write Enterprise Java Beans Comparison with Related Patterns Thought Question Programs on the CD-ROM Summary of Structural Patterns Section 4 Behavioral Patterns Chapter 16 Chain of Responsibility Pattern Applicability Sample Code The List Boxes Programming a Help System A Chain or a Tree? Kinds of Requests Examples in Java Consequences of the Chain of Responsibility Thought Questions Programs on the CD-ROM Chapter 17 The Command Pattern Motivation Command Objects Building Command Objects The Command Pattern The Command Pattern in the Java Language Consequences of the Command Pattern Providing Undo Thought Questions Programs on the CD-ROM Chapter 18 The Interpreter Pattern Motivation Applicability Simple Report Example Interpreting the Language Objects Used in Parsing Reducing the Parsed Stack Implementing the Interpreter Pattern Consequences of the Interpreter Pattern Thought Question programs on the CD-ROM Chapter 19 The Iterator Pattern Motivation Enumerations in Java Sample Code Filtered Iterators Consequence of the Iterator Pattern Composites and Iterators Iterators in Java 1.2 Thought Question Programs on the CD-ROM Chapter 20 The Mediator Pattern An Example System Interactions between Controls Sample Code Mediators and Command Objects Consequences of the Mediator Pattern Single Interface Mediators Implementation Issues Programs on the CD-ROM Chapter 21 The Memento Pattern Motivation Implementation Sample Code Consequences of the Memento Pattern Thought Question Programs on the CD-ROM Chapter 22 The Observer Pattern Watching Colors Change The Message to the Media The JList as an Observer The MVC Architecture as an Observer The Observer Interface and Observable Class Consequences of the Observer Pattern Thought Questions Programs on the CD-ROM Chapter 23 The State Pattern Sample Code Switching between States How the Mediator Interacts with the StateManager State Transitions Mediators and the God Class Consequences of the State Pattern Thought Questions Programs on the CD-ROM Chapter 24 The Strategy Pattern Motivation Sample Code The Context Class The Program Commands The Line and Bar Graph Strategies Drawing Plots in Java Consequences of the Strategy Pattern Thought Question Programs on the CD-ROM Chapter 25 The Template Pattern Motivation Kinds of Methods in a Template Class Template Method Patterns in Java Sample Code Templates and Callbacks Consequences of the Template Pattern Thought Question Programs on the CD-ROM Chapter 26 The Visitor Pattern Motivation When to Use the Visitor Pattern Sample Code Visiting the Classes Visiting Several Classes Bosses are Employees, Too Catch-All Operations Using Visitors Double Dispatching Traversing a Series of Classes Consequence of the Visitor Pattern Thought Question Programs on the CD-ROM Section 5 Design Patterns and the Java Foundation Classes Chapter 27 The JFC, or Swing Installing and Using Swing Ideas behind Swing The Swing Class Hierarchy Chapter 28 Writing a Simple JFC Program Setting the Look and Feel Setting the Window Close Box Making a JxFrame Class A Simple Two-Button Program More on JButton Programs on the CD-ROM Chapter 29 Radio Buttons and Toolbars Radio Buttons The JToolBar JToggleButton A Sample Button Program Programs on the CD-ROM Chapter 30 Menus andActions Action Objects Design Patterns in the Action Object Programs on the CD-ROM Chapter 31 The JList Class List Selections and Events Changing a List Display Dynamically A Sorted JList with a ListModel Sorting More-Complicated Objects Getting Database Keys Adding Pictures in List Boxes Programs on the CD-ROM Chapter 32 The JTable Class A Simple JTable Program Cell Renderers Rendering Other Kinds of Classes Selecting Cells in a Table Patterns Used in This Image Table Programs on the CD-ROM Chapter 33 The JTree Class The TreeModel Interface Programs on the CD-ROM Summary Section 6 Case Studies Chapter 34 Sandy and the Mediator Chapter 35 Herb's Text Processing Tangle Chapter 36 Mary's Dilemma Bibliography