Annotations are used with the @
character in front of them and can be attached to packages, classes, interfaces, fields, methods, method parameters, generic type declaration and use, and, finally, to annotations. Annotations can be used almost everywhere and they are used to describe some program meta information. For example, the @RestController
annotation does not directly alter the behavior of the OrderController
class. The behavior of the class is described by the Java code that is inside. The annotation helps Spring to understand what the class is and how it can and should be used. When Spring scans all the packages and classes to discover the different Spring beans, it sees the annotation on the class and takes it into account. There can be other annotations on the class that Spring does not understand. They may be used by some other framework or program code. Spring ignores them as any well-behaving framework. For example, as we will see later, we have in our code base...
Java 9 Programming By Example
By :
Java 9 Programming By Example
By:
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
Credits
About the Author
About the Reviewer
www.PacktPub.com
Customer Feedback
Preface
Free Chapter
Getting Started with Java 9
The First Real Java Program - Sorting Names
Optimizing the Sort - Making Code Professional
Mastermind - Creating a Game
Extending the Game - Run Parallel, Run Faster
Making Our Game Professional - Do it as a Webapp
Building a Commercial Web Application Using REST
Extending Our E-Commerce Application
Building an Accounting Application Using Reactive Programming
Finalizing Java Knowledge to a Professional Level
Customer Reviews