Java Design Patterns

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Course Overview

This course offers hands-on practical coverage and grounding in the proper use of design patterns in Java. The content revolves around the use of object-oriented design patterns, these patterns being applicable to many situations and frameworks in the Java marketplace. The course is built around a central practical application, and can be delivered using either Eclipse or Oracle JDeveloper as the IDE.

Audience

• Analyst/Designers
• Analyst/Programmers
• Technicians

Prerequisites

• PC Fundamentals
• Programming Experience

Course Outline

Intro and Web App Architecture

• Layering an Application
• A Logical 3-tier architecture
• Presentation Tier: MVC Pattern
• Data Access Tier: Data Access
• Objects Pattern
• Business Logic Tier: Using Design Patterns

Design by Patterns

• Why do we need Patterns?
• The 'Gang of Four'.
• Common Elements of Object-Oriented Patterns
• Patterns to Aid Encapsulation, Polymorphism, Loose Coupling, Reuse and Maintainability
• Refactoring as a Way of Life
• Why Tests are Important
• Write to Interfaces and NOT to Implementation
• Favour Composition over Inheritance

Creational Patterns

• Replace Constructors with Factory Classes
• Replace Global with Singleton

Structural Patterns

• Adapter Pattern to Aid Code Reuse
• Tree-style Hierarchies with Composite Pattern
• Adding to Functionality with Decorator Pattern
• Controlling Object Access with Proxy Pattern

Behavioural Patterns

• Encapsulate Invocation with Command
• Loose Coupling with Observer
• Exposing Collections with Iterator Pattern
• Controlling Behaviour with State Pattern
• Strategy: Algorithms as Objects

Putting it All Together

• Thinking in Patterns
• Avoid Pattern Overuse
• Anti-Patterns
• Refactoring to Patterns

Java Design Patterns / J012