Design Patterns Java¿ Workbook

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9780201743975: Design Patterns Java¿ Workbook

This new workbook complements the classic Design Patterns, giving Java developers hands-on experience in transforming pattern concepts into working designs and code. Steven John Metsker presents nearly 90 practical pattern exercises, encompassing all 23 patterns first introduced in Design Patterns, and others that have since been identified. Metsker organizes Java design patterns by five categories of "intent": interfaces, responsibility, construction, operations, and extensions. Each section of the book focuses on one category, identifying the relevant challenges facing Java developers, and showing how specific patterns can be used to solve problems that recur in Java development and cannot easily be solved without their use. A Solutions chapter provides Metsker's detailed solutions to each problem, including -- where necessary -- UML diagrams. The accompanying CD-ROM contains all code from the book, plus additional bonus code not included in the book. For all Java developers who want to use patterns to improve their software.

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Review:

Aimed at the intermediate or advanced Java developer, Design Patterns Java Workbook provides an in-depth and challenging look at 23 "classic" software patterns illustrated with Java examples.

This title fills a valuable niche by reprising the well-known guide to patterns, Addison-Wesley's Design Patterns: Elements of Reusable Software Design. While that earlier book relied on C++ and Smalltalk for its examples, this new volume uses Java code for the discussion of the same 23 design techniques. Many of the explanations draw on the author's custom classes for a hypothetical fireworks company, supplemented by material using "core" classes in standard Java. This text shows how to both recognize patterns in existing code and to incorporate them into new designs.

Early sections look at interfaces, including a standout section on trees and the Composite pattern. For the chapter on responsibility patterns, veteran Java programmers will appreciate the use of JDBC used to explain the Bridge pattern and tips for spotting other patterns in everyday Java. Builder patterns come next, with a full tour of ways to construct objects more flexibly. When it comes to operations patterns, a notable section on the Interpreter pattern presents some challenging material on language parsers.

Final chapters on extension patterns show how Java classes can extend one another using inheritance and other design principles. The discussion here of Java stream classes as examples of decorator patterns can help explain these rich (and sometimes confusing) sets of objects. Another useful section on Iterators shows how to create "type-safe" collections (normally not available in Java). Throughout this text, the author challenges the reader with dozens of easy-to-difficult questions (including actual design exercises). Complete answers are provided at the end of the book.

As a hands-on workbook that will invite you to think about patterns in Java in new ways, this text is an invaluable companion to earlier titles on patterns. Its mix of design smarts and clever examples help make it ideal for the more advanced programmer. Less experienced readers can also benefit from its intelligent presentation of some of the best available thinking in software design today, now tailored to a Java audience. --Richard Dragan

From the Back Cover:

Praise for Design Patterns Java™ Workbook

“An excellent book... I’m incredibly impressed with how readable it is. I understood every single chapter, and I think any reader with any Java familiarity would. This book is going to be required reading in a lot of places, including my office.”

     —Joshua Engel

“Provides a new, more Java-literate way to understand the 23 GoF patterns.”

     —Bob Hanmer

“This book translates Design Patterns into what Java programmers need to know. It is full of short, engaging programming and design problems with solutions—making it easy for programmers to work through solutions and really make patterns ‘stick.’”

     —Rebecca Wirfs-Brock

“This is one exciting book. It’s approachable, readable, interesting, instructive, and just plain valuable. It’ll eclipse all other books purporting to teach people the GoF patterns in Java—and perhaps any other language.”

     —John Vlissides

Java programmers, you now have the resource you need to harness the considerable power of design patterns. This unique book presents examples, exercises, and challenges that will help you apply design pattern theory to real-world problems. Steve Metsker's learn-by-doing approach helps you enhance your practical skills and build the confidence you need to use design patterns effectively in mission-critical applications.

Design Patterns Java™ Workbook features the twenty-three foundational design patterns introduced in the classic book Design Patterns (Addison-Wesley, 1995). In this new, hands-on workbook, the patterns are organized into five major categories: interfaces, responsibility, construction, operations, and extensions. Each category begins with a chapter that reviews and challenges your ability to apply facilities built into Java. These introductory sections are followed by chapters that explain a particular pattern in detail, demonstrate the pattern in use with UML diagrams and Java code, and provide programming problems for you to solve.

With this book you will build expertise in important areas such as:

  • Adapting domain data to Swing components
  • Creating a FACADE for Swing
  • Handling recursion in composites
  • Understanding the role of BRIDGE in Java database connectivity
  • Making the connection between Model/View/Controller and OBSERVER
  • Maintaining relational integrity with a mediator
  • Using proxies to communicate between computers
  • Letting a service provider decide which class to instantiate
  • Supporting undo operations with MEMENTO
  • Prototyping with clones
  • Using COMMAND to supply a service
  • Developing thread-safe iterators
  • Extending classes with DECORATOR and VISITOR

Solutions to the design pattern challenges appear in the back of the book, so you can compare your own work to expert approaches. A brief guide to UML explains the modeling notation, and an accompanying Web site provides all the code examples from the book.

Through the instruction and exercises offered in Design Patterns Java™ Workbook , you can fully understand the role of design patterns in Java application development, and enhance your ability to put design patterns to work.



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