Practical Java Programming for IoT, AI, and Blockchain

Perry Xiao

• Publisher: Wiley
• Year: 2019
• Print ISBN: 9781119560012
• eBook ISBN: 9781119560036
• Edition: 1
• Topic: Computer Science
• Subtopic: Programming
• Index: Computer Science

Learn practical uses for some of the hottest tech applications trending among technology professionals

We are living in an era of digital revolution. On the horizon, many emerging digital technologies are being developed at a breathtaking speed. Whether we like it or not, whether we are ready or not, digital technologies are going to penetrate more and more, deeper and deeper, into every aspect of our lives. This is going to fundamentally change how we live, how we work, and how we socialize.

Java, as a modern high-level programming language, is an excellent tool for helping us to learn these digital technologies, as well as to develop digital applications, such as IoT, AI, Cybersecurity, Blockchain and more. Practical Java Programming uses Java as a tool to help you learn these new digital technologies and to be better prepared for the future changes.

• Gives you a brief overview for getting started with Java Programming
• Dives into how you can apply your new knowledge to some of the biggest trending applications today
• Helps you understand how to program Java to interact with operating systems, networking, and mobile applications
• Shows you how Java can be used in trending tech applications such as IoT (Internet of Things), AI (Artificial Intelligence), Cybersecurity, and Blockchain

Get ready to find out firsthand how Java can be used for connected home devices, healthcare, the cloud, and all the hottest tech applications.

Part I

In This Part:

• Chapter 1: Introduction to Java
• Chapter 2: Getting Started with Java Programming

CHAPTER 1
Introduction to Java

“Experience is simply the name we give our mistakes.”

—Oscar Wilde

• 1.1 What Is Java?
• 1.2 Versions of Java
• 1.3 Java Architecture
• 1.4 Editions of Java
• 1.5 The Java Spring Framework
• 1.6 Advantages and Disadvantages of Java
• 1.7 Java Certificates
• 1.8 Summary
• 1.9 Chapter Review Questions

1.1 What Is Java?

Java is a high-level, object-oriented, general-purpose programming language that was originally developed by James Gosling, a Canadian computer scientist, at what was then Sun Microsystems, in the U.S. state of California in 1991. Sun Microsystems was later acquired by Oracle Corporation, also in California, in 2010. Java was a byproduct of Sun's “Green” project, and it was originally designed as a platform-independent language for programming household electronic appliances. However, Java was too advanced for such applications. Gosling designed Java syntax based on the C and C++ languages, but with fewer low-level facilities. Java was named after the popular Indonesian Java coffee. Java first appeared in 1995, through the HotJava and Netscape web browsers, as a plug-in called Java Applets, which could add dynamic content and interactions to static, pale web pages. Java soon became popular with all the major web browsers incorporating the ability to run Java applets. You've probably seen the famous Java logo, a cup of hot coffee, along with the Java mascot, Duke. Today, after decades of effect, Java has been developed into a fully functional, multipurpose, and powerful language suitable for both individual and enterprise users. Java is different from JavaScript, which is a script language that runs only within a web browser.

The Java language has five main principles; it was designed to be all of the following:

• Simple, object-oriented, and familiar
• Robust and secure
• Architecture-neutral and portable
• High-performance
• Interpreted, threaded, and dynamic

The main advantage of Java is its platform independence; that is, programs written in the language can be “write once, run anywhere” (WORA). This independence is achieved through the concept of the Java Virtual Machine (JVM), illustrated in Figure 1.1. With conventional programming languages like C/C++, to run on different operating systems such as Windows, Mac, and Linux, the C/C++ source file needs to be compiled separately on each operating system. Because each executable file runs in its native operating system, the executable files compiled in one operating system cannot run in another operating system. Java works differently. The Java source code (a .java file) is compiled into Java bytecode (a .class file). The bytecode files are not executable files and cannot run directly in the operating system. Instead, they run in the JVM, which handles the differences between operating systems and presents an identical environment for Java programs to run in. JVM is a novel idea that makes Java platform-independent. The drawback of the JVM is that Java pr...

Table of contents

• Cover
• Table of Contents
• Preface
• Introduction
• Part I
• Part II
• Part III
• APPENDIX A: Java Documentation and Archiving Tools and Online Resources
• APPENDIX B: Apache Maven Tutorial
• APPENDIX C: Git and GitHub Tutorial
• Index
• End User License Agreement