Book Image

Hands-On Design Patterns with Java

By : Dr. Edward Lavieri
2 (1)
Book Image

Hands-On Design Patterns with Java

2 (1)
By: Dr. Edward Lavieri

Overview of this book

Java design patterns are reusable and proven solutions to software design problems. This book covers over 60 battle-tested design patterns used by developers to create functional, reusable, and flexible software. Hands-On Design Patterns with Java starts with an introduction to the Unified Modeling Language (UML), and delves into class and object diagrams with the help of detailed examples. You'll study concepts and approaches to object-oriented programming (OOP) and OOP design patterns to build robust applications. As you advance, you'll explore the categories of GOF design patterns, such as behavioral, creational, and structural, that help you improve code readability and enable large-scale reuse of software. You’ll also discover how to work effectively with microservices and serverless architectures by using cloud design patterns, each of which is thoroughly explained and accompanied by real-world programming solutions. By the end of the book, you’ll be able to speed up your software development process using the right design patterns, and you’ll be comfortable working on scalable and maintainable projects of any size.
Table of Contents (15 chapters)
Free Chapter
Section 1: Introducing Design Patterns
Section 2: Original Design Patterns
Section 3: New Design Patterns

Understanding the template method pattern

The template method design pattern involves creating an algorithm template with processing steps relegated to child classes. The purpose is to give the child classes the ability to specify their own steps while still remaining true to the algorithm structure.

As the design pattern's name suggests, we create a template that can be followed by subordinate classes. An example is a recipe template that has bakers following the steps to create the shell and then adding their own pie filling based on their preference. At the end of the process, all the pies will look similar but will have different fillings.

Another example is creating a syllabus or resume template. Each use of the template can be used for unique content and would still not alter the template.