Book Image

Java 9 Programming Blueprints

By : Jason Lee
Book Image

Java 9 Programming Blueprints

By: Jason Lee

Overview of this book

Java is a powerful language that has applications in a wide variety of fields. From playing games on your computer to performing banking transactions, Java is at the heart of everything. The book starts by unveiling the new features of Java 9 and quickly walks you through the building blocks that form the basis of writing applications. There are 10 comprehensive projects in the book that will showcase the various features of Java 9. You will learn to build an email filter that separates spam messages from all your inboxes, a social media aggregator app that will help you efficiently track various feeds, and a microservice for a client/server note application, to name a few. The book covers various libraries and frameworks in these projects, and also introduces a few more frameworks that complement and extend the Java SDK. Through the course of building applications, this book will not only help you get to grips with the various features of Java 9, but will also teach you how to design and prototype professional-grade applications with performance and security considerations.
Table of Contents (19 chapters)
Title Page
Credits
About the Author
About the Reviewer
www.PacktPub.com
Customer Feedback
Preface
9
Taking Notes with Monumentum

Building the library


The foundational piece of this project is the library which both the CLI and the GUI will consume, so it makes sense to start here. When designing the library--its inputs, outputs, and general behavior--it helps to understand what exactly do we want this system to do, so let's take some time to discuss the functional requirements.

As stated in the introduction, we'd like to be able to search for duplicate files in an arbitrary number of directories. We'd also like to be able to restrict the search and comparison to only certain files. If we don't specify a pattern to match, then we want to check every file.

The most important part is how to identify a match. There are, of course, a myriad of ways in which this can be done, but the approach we will use is as follows:

  • Identify files that have the same filename. Think of those situations where you might have downloaded images from your camera to your computer for safekeeping, then, later, perhaps you forgot that you had already...