Book Image

Practical Design Patterns for Java Developers

By : Miroslav Wengner
Book Image

Practical Design Patterns for Java Developers

By: Miroslav Wengner

Overview of this book

Design patterns are proven solutions to standard problems in software design and development, allowing you to create reusable, flexible, and maintainable code. This book enables you to upskill by understanding popular patterns to evolve into a proficient software developer. You’ll start by exploring the Java platform to understand and implement design patterns. Then, using various examples, you’ll create different types of vehicles or their parts to enable clarity in design pattern thinking, along with developing new vehicle instances using dedicated design patterns to make the process consistent. As you progress, you’ll find out how to extend vehicle functionalities and keep the code base structure and behavior clean and shiny. Concurrency plays an important role in application design, and you'll learn how to employ a such design patterns with the visualization of thread interaction. The concluding chapters will help you identify and understand anti-pattern utilization in the early stages of development to address refactoring smoothly. The book covers the use of Java 17+ features such as pattern matching, switch cases, and instances of enhancements to enable productivity. By the end of this book, you’ll have gained practical knowledge of design patterns in Java and be able to apply them to address common design problems.
Table of Contents (14 chapters)
1
Part 1: Design Patterns and Java Platform Functionalities
4
Part 2: Implementing Standard Design Patterns Using Java Programming
8
Part 3: Other Essential Patterns and Anti-Patterns

Decoupling and developing objects independently with the bridge pattern

The goal of this pattern is to separate the abstraction from its implementation so that both can change independently. The bridge pattern was described by the GoF.

Motivation

The bridge pattern is about prioritizing composition over inheritance. The implementation details are moved from the hierarchy to another object with a separate hierarchy. The bridge pattern uses encapsulation and aggregation, and may use inheritance to separate responsibilities into different classes.

Finding it in the JDK

Uses of the bridge pattern can be found in the java.util.logging package and the implementation of the Logger class. The class is located in the java.logging module. It implements the Filter interface. This interface is used to gain additional control over logged content beyond the standard log level.

Sample code

Let us see an example of two types of vehicles: a sport car and a pickup. The vehicles vary...