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Home > Java > Java Fundamentals > Design Patterns in Java Software

Design Patterns in Java Software

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Class Description

Class Overview

This course seeks to develop, for the experienced Java programmer, a strong, shared vocabulary of design patterns and best practices. The course begins with a discussion of how to recognize and apply design patterns - that is, how to incorporate pattern awareness into one's own analysis, design, and implementation practices. The main body of the course focuses on the Gang of Four design patterns, with a chapter each on creational, behavioral, and structural patterns. Classroom time is about evenly split between discussion, group design exercises, and coding labs to reinforce finer points of important patterns.

This is not a patterns catalog: it is as much a study of how to "think in patterns" as it is an introduction to several of the most important patterns. Students will be challenged to bring their own previous development experience to the discussion, to see the patterns in everyday design and coding solutions. The course puts more emphasis on some patterns than others. We believe that students will be better served by going into a few patterns in depth, with lively discussions of several others, than by following a regular routine of discussion and examples over every GoF pattern.

Class Goals

  • Start to think in terms of design patterns.
  • Recognize and apply patterns to specific software development problems.
  • Use known patterns as a shared vocabulary in designing and discussing solutions.
  • Use Factories and Singletons to control object creation, for a variety of reasons.
  • Use Observers, Observables, and Model/View/Controller systems to decouple application behavior and preserve code scalability.
  • Understand the full motivation for the Command pattern and take advantage of Command frameworks in JFC.
  • Implement Adapters, rather than building redundant classes or creating intermediate data structures for consumption by existing code.
  • Understand and apply a range of other J2SE and J2EE patterns to improve code quality and scalability, and to produce high-quality solutions right off the bat.

Class Outline

  1. Recognizing and Applying Patterns
    1. Design Patterns
    2. Defining a Pattern
    3. Unified Modeling Language
    4. Seeing Patterns
    5. Warning Signs and Pitfalls
  2. Creational Patterns
    1. Factory Patterns
    2. The Singleton Pattern
    3. APIs and Providers
    4. Cascading Factories
  3. Behavioral Patterns
    1. The Strategy Pattern
    2. The Template Method Pattern
    3. The Observer Pattern
    4. The Model/View/Controller Pattern
    5. The Command Pattern
    6. The Chain of Responsibility Pattern
  4. Structural Patterns
    1. The Composite Pattern
    2. The Adapter Pattern
    3. The Decorator Pattern
    4. The Façade Pattern
    5. The Flyweight Pattern
  5. J2EE Patterns
    1. Model/View/Controller, Redux
    2. The Intercepting Filter Pattern
    3. The Front and Application Controller Patterns
    4. The Business Delegate Pattern
    5. The Service Locator Pattern
    6. The Transfer Object Pattern
    7. The Composite Entity Pattern
    8. The Data Access Object Pattern

Class Materials

Each student in our Live Online and our Onsite classes receives a comprehensive set of materials, including course notes and all the class examples.

Class Prerequisites

Experience in the following areas is required:

  • Solid Java programming experience is essential - especially object-oriented use of the language. Language features and techniques that are integral to some lab exercises include interfaces and abstract classes, threading, generics and collections, and recursive methods.
  • Previous experience with UML (Unified Modeling Language) will be helpful, but is not critical. The course uses UML class diagrams extensively but keeps notation fairly simple, and also includes a quick-reference appendix.

Technical Requirements

Our computer technical requirements and setup process is easy, with support just a click away.

  • Java ®, all Java-based marks, Hibernate ®, and all Hibernate-based marks are trademarks or registered trademarks of Sun Microsystems, Inc. or its subsidiaries in the U.S. and other countries.
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