Preface

This book was written to provide software engineers, system architects, and software developers a timeless reference and guide on over 60 design patterns. While the examples are provided in Java, the explanations and examples are programming language-agnostic. 

In addition to covering behavioral, creational, structural, architectural, functional, and reactive design patterns, this book provides the reader with an introduction to the Unified Modeling Language (UML) and Object-Oriented Programming (OOP). UML is covered with specific focus on behavioral and structural diagrams, as they are used throughout the book to provide a deeper understanding of the featured design-pattern implementations. OOP is covered to provide the reader with an overview or refresher, depending on their experience. Understanding OOP principles is key to understanding how to program in Java.