Book Image

Java 9 Programming By Example

By : Peter Verhas
Book Image

Java 9 Programming By Example

By: Peter Verhas

Overview of this book

This book gets you started with essential software development easily and quickly, guiding you through Java’s different facets. By adopting this approach, you can bridge the gap between learning and doing immediately. You will learn the new features of Java 9 quickly and experience a simple and powerful approach to software development. You will be able to use the Java runtime tools, understand the Java environment, and create Java programs. We then cover more simple examples to build your foundation before diving to some complex data structure problems that will solidify your Java 9 skills. With a special focus on modularity and HTTP 2.0, this book will guide you to get employed as a top notch Java developer. By the end of the book, you will have a firm foundation to continue your journey towards becoming a professional Java developer.
Table of Contents (17 chapters)
Title Page
About the Author
About the Reviewer
Customer Feedback

Setting up the project

Since we are still using Spring boot, the build file does not need any modification; we will use it as we will use the same file as in the last chapter. The package structure, however, is a bit different. This time, we do something more complicated than getting a request and responding to whatever the backend services deliver to us. Now, we have to implement complex business logic that, as we will see, needs many classes. When we have more than 10 classes, give or take, in a certain package, it is time to think about putting them into separate packages. The classes that are related to each other and have a similar functionality should be put into one package. This way, we will have a package for the following:

  • The controllers (though we have only one in this example, but usually there are more)
  • Data storing beans that have no more functionality than storing data, thus, fields, setters, and getters
  • Checkers that will help us check power cords when a desk-side lamp is ordered...