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
About the Author
About the Reviewer
Customer Feedback
Taking Notes with Monumentum

Chapter 4. Date Calculator

If you've been developing in Java for any serious length of time, you know one thing to be true--working with dates is awful. The java.util.Date class, with its related classes, shipped with 1.0, and Calendar and its related classes coming along in 1.1. Even early on, problems were apparent. For example, the Javadoc on Date says this--Unfortunately, the API for these functions was not amenable to internationalization. As a result, Calendar was introduced in 1.1. Sure, there have been other enhancements down through the years, but given Java's strict adherence to backwards compatibility, there's only so much the language architects can do. As much as they may want to fix those APIs, their hands are tied.

Fortunately, Java Specification Request (JSR 310) was filed. Led by Stephen Colebourne, an effort was begun to create a new API, based on the very popular open source library, Joda-Time. In this chapter, we'll take an in-depth look at this new API, then build a simple...