Chapter 1, Installation and Sneak Peek into Java 9, helps you to set up the development environment for running your Java programs and gives a brief overview of the new features and tools in Java 9

Chapter 2, Fast Track to OOP - Classes and Interfaces, covers object-oriented programming principles and design solutions, including inner classes, inheritance, composition, interfaces, enumerations, and the Java 9 changes to Javadocs.

Chapter 3, Modular Programming, introduces jigsaw as a major feature and a huge leap for the Java ecosystem. This chapter demonstrates how to use tools, such as jdeps and jlink, to create simple modular applications, and related artifacts such as modular JARs, and finally how to modularize your pre-Java 9 applications.

Chapter 4, Going Functional, introduces a programming paradigm called functional programming and its applicability in Java 9. Topics covered include functional interfaces, lambda expressions, and lambda-friendly APIs.

Chapter 5, Stream Operations and Pipelines, shows how to leverage streams and chain multiple operations on a collection to create a pipeline, use factory methods to create collection objects, create and operate on streams, and create an operation pipeline on streams, including parallel computations.

Chapter 6, Database Programming, covers both basic and commonly used interactions between a Java application and a database, right from connecting to the database and performing CRUD operations to creating transactions, storing procedures, and working with large objects.

Chapter 7, Concurrent and Multithreaded Programming, presents different ways of incorporating concurrency and some best practices, such as synchronization and immutability. We will also discuss the implementation of some commonly used patterns, such as divide-conquer and publish-subscribe, using the constructs provided by Java.

Chapter 8, Better Management of the OS Process, elaborates on the new API enhancements around the Process API.

Chapter 9, GUI Programming Using JavaFX, shows how to get started with creating JavaFX applications, leverage CSS styling into your applications, build a GUI in a declarative way using FXML, and use the graph, media, and browser components of JavaFX.

Chapter 10, RESTful Webservices Using Spring Boot, deals with creating simple RESTful webservices using Spring boot, deploying them to Heroku, and finally dockerizing Spring boot-based RESTful webservice applications.

Chapter 11, Networking, shows you how to use different HTTP client API libraries, namely the API provided in Java 9 as an incubator module, the Apache HTTP client, and the Unirest HTTP client API.

Chapter 12, Memory Management and Debugging, explores managing the memory of a Java application, including an introduction to the garbage collection algorithm used in Java 9, and some new features, which help in advanced application diagnostics. We'll also show how to manage resources by using the new try-with-resources construct and the new stack walking API.

Chapter 13, The Read-Evaluate-Print Loop (REPL) Using JShell, shows you how to work with the new REPL tool and JShell, provided as part of the JDK.

Chapter 14, Scripting Using Oracle Nashorn, shows how to interoperate between JavaScript and Java using the Oracle Nashorn JavaScript engine and how to use the jjs command-line tool to run JavaScript. It also explores Oracle Nashorn's support for the new ECMAScript 6.

Chapter 15, Testing, explains how to unit-test your APIs before they are integrated with other components, including stubbing dependencies with some dummy data and mocking dependencies. We will also show you how to write fixtures to populate the test data and then how to test your application behavior by integrating different APIs and testing them.

To run the code examples, you will need a computer with 2GB RAM at least, 10GB free disk space, and Windows or Linux OS. The following software/libraries are required:

The book is for intermediate to advanced Java programmers who want to make their applications fast, secure, and scalable.

In this book, you will find several headings that appear frequently (Getting ready, How to do it…, How it works…, There's more…, and See also). To give clear instructions on how to complete a recipe, we use these sections as follows:

In this book, you will find a number of text styles that distinguish between different kinds of information. Here are some examples of these styles and an explanation of their meaning. Code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles are shown as follows: "When run, it produces the same value as with an object of the Vehicle class." A block of code is set as follows:

module newfeatures{
  requires jdk.incubator.httpclient;
}

Any command-line input or output is written as follows:

$> vim ~/.bash_aliases

New terms and important words are shown in bold. Words that you see on the screen, for example, in menus or dialog boxes, appear in the text like this: "Right-click on My Computer and then click on Properties."

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Now that you are the proud owner of a Packt book, we have a number of things to help you to get the most from your purchase.