Book Image

Java 9: Building Robust Modular Applications

By : Dr. Edward Lavieri, Peter Verhas, Jason Lee
Book Image

Java 9: Building Robust Modular Applications

By: Dr. Edward Lavieri, Peter Verhas, Jason Lee

Overview of this book

Java 9 and its new features add to the richness of the language; Java is one of the languages most used by developers to build robust software applications. Java 9 comes with a special emphasis on modularity with its integration with Jigsaw. This course is your one-stop guide to mastering the language. You'll be provided with an overview and explanation of the new features introduced in Java 9 and the importance of the new APIs and enhancements. Some new features of Java 9 are ground-breaking; if you are an experienced programmer, you will be able to make your enterprise applications leaner by learning these new features. You'll be provided with practical guidance in applying your newly acquired knowledge of Java 9 and further information on future developments of the Java platform. This course will improve your productivity, making your applications faster. Next, you'll go on to implement everything you've learned by building 10 cool projects. 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 just a few. By the end of this course, you will be well acquainted with Java 9 features and able to build your own applications and projects. This Learning Path contains the best content from the following two recently published Packt products: • Mastering Java 9 • Java 9 Programming Blueprints
Table of Contents (33 chapters)
Title Page - Courses
Packt Upsell - Courses
Preface
25
Taking Notes with Monumentum
Bibliography
Index

A brief look at the history of email protocols


Like many great computing concepts, email--electronic mail--was first introduced in the 1960s, though it looked much different then. A thorough history of email, while certainly a great technical curiosity, is beyond the scope of our purposes here, but I think it would be helpful to take a look at a few of the email protocols still relevant today, those being SMTP for sending mail, and POP3 and IMAP for (from your email client's perspective) receiving mail. (Technically, the email is received by the server via SMTP as that is the on-the-wire protocol used by Mail Transfer Agents (MTAs), to transfer mail from one server to another. We non-MTA authors never think of it in those terms, so we need not be overly concerned by that distinction).

We'll start with sending an email, as our focus in this chapter will be more on folder management. SMTP (Simple Mail Transport Protocol), created in 1982 and last updated in 1998, is the dominant protocol to...