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Hands-On Design Patterns with Java
Hands-On Design Patterns with Java

Hands-On Design Patterns with Java: Learn design patterns that enable the building of large-scale software architectures

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Hands-On Design Patterns with Java

Unified Modeling Language Primer

This book features several design patterns and covers their implementation using Java. We can use Unified Modeling Language (UML) to help communicate class structures, objects, and interactions. This chapter provides an overview of UML, with a specific focus on diagrams applicable to the hands-on activities in this book.

The following topics will be covered in this chapter:

  • Introducing UML
  • Behavior diagrams
  • Structural diagrams

Technical requirements

This chapter does not have any technical requirements. In order to create UML diagrams, the following open source software tool is recommended:

Modelio can be run on systems with any of the following operating systems:

  • Debian/Ubuntu
  • macOS X
  • RedHat/CentOS
  • Windows 7
  • Windows 8
  • Windows 10

Introducing UML

UML was developed in 1994 to document object-oriented systems. Since that time, UML has become a standard tool for software engineers, software developers, and businesses. UML is used to design software and, after programming, also provides a visual record for the system which can be included as part of formal software documentation.

There are two types of UML diagrams—behavioral and structural. Both are described in the sections that follow.

Understanding behavioral UML diagrams

Behavioral diagrams illustrate how system components interact to form a system. The four diagrams listed here are behavioral, and are briefly described in the subsections that follow:

  • Activity diagrams
  • Interaction diagrams
  • State machine diagrams
  • Use case diagrams

Activity diagrams

Activity diagrams illustrate the flow of processes in a system. This type of diagram is used to visually document activities within a system, also referred to as a system's procedures or dynamic components.

The following activity diagram shows the activities involved when a coffee shop customer places an order. The starting point is the top black circle. From there, an order is received. Beneath the Receive...

Understanding structural UML diagrams

Structural diagrams illustrate components of a system. The six diagrams listed here are structural, and are briefly described in the subsections that follow:

  • Class diagrams
  • Component diagrams
  • Composite structure diagrams
  • Deployment diagrams
  • Object diagrams
  • Package diagrams

Class diagrams

The class diagram is the most commonly used UML diagram, as it provides a visual description of a system's objects. Consider that, in Java, everything is an object, so you can see the relevance and reason as to why this particular diagram is so widely used. Class diagrams do more than just display objects—they visually depict their construction and relationships with other classes.

As you...

Summary

The Universal Modeling Language (UML) is used to create visual documentation of our systems. This can be used to design a system as well as document a system. UML is widely used by software engineers, software developers, and other professionals.

Two of the 14 UML diagrams are behavioral and structural. Behavioral diagrams illustrate how system components interact to form a system and include activity diagrams, interaction diagrams, state machine diagrams, and use case diagrams. There are several types of interaction UML diagrams, including sequence diagrams, communication diagrams, and timing diagrams.

Structural diagrams illustrate components of a system and include class diagrams, component diagrams, composite structure diagrams, deployment diagrams, object diagrams, and package diagrams.

In the next chapter, Object-Oriented Design Patterns, we will explore intermediate...

Questions

  1. What are the two basic types of UML diagrams?
  2. Why was UML initially created?
  3. List four behavioral UML diagrams.
  4. Which UML diagram provides a system's process flow?
  5. Which UML diagram documents the interactions between a system and its users?
  6. What is a UML actor?
  7. What type of UML diagram illustrates system components?
  8. What is the most commonly used UML diagram?
  9. Which UML diagram shows the runtime structure of a system?
  10. Which UML diagram visually documents a system's hardware and software?

Further reading

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Key benefits

  • Learn OOP, functional, and reactive patterns for creating readable and maintainable code
  • Explore architectural patterns and practices for building scalable and reliable applications
  • Tackle all kinds of performance-related issues and streamline development using design patterns

Description

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.

Who is this book for?

If you are a developer who wants to learn how to write clear, concise, and effective code for building production-ready applications, this book is for you. Familiarity with the fundamentals of Java is assumed.

What you will learn

  • Understand the significance of design patterns for software engineering
  • Visualize software design with UML diagrams
  • Strengthen your understanding of OOP to create reusable software systems
  • Discover GOF design patterns to develop scalable applications
  • Examine programming challenges and the design patterns that solve them
  • Explore architectural patterns for microservices and cloud development
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Publication date, Length, Edition, Language, ISBN-13
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Length: 360 pages
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Language : English
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Table of Contents

14 Chapters
Section 1: Introducing Design Patterns Chevron down icon Chevron up icon
Unified Modeling Language Primer Chevron down icon Chevron up icon
Object-Oriented Design Patterns Chevron down icon Chevron up icon
Section 2: Original Design Patterns Chevron down icon Chevron up icon
Behavioral Design Patterns Chevron down icon Chevron up icon
Creational Design Patterns Chevron down icon Chevron up icon
Structural Design Patterns Chevron down icon Chevron up icon
Section 3: New Design Patterns Chevron down icon Chevron up icon
Architectural Patterns - Part I Chevron down icon Chevron up icon
Architectural Patterns - Part II Chevron down icon Chevron up icon
Functional Design Patterns Chevron down icon Chevron up icon
Reactive Design Patterns Chevron down icon Chevron up icon
Assessments Chevron down icon Chevron up icon
Other Books You May Enjoy Chevron down icon Chevron up icon

Customer reviews

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Cliente de Amazon Dec 01, 2019
Full star icon Full star icon Empty star icon Empty star icon Empty star icon 2
Otra decepción de Packt publications, a veces no entiendo como es que dejan publicar este tipo de libros donde el contenido es a lo mucho regular. Explicaciones escuetas, ejemplos nada practicos. El autor trata de abarcar tantos pratones de diseño que el libro termina siendo más una lista de nombres de patrones con una breve descripción de ellos.
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