Book Image

Java Projects - Second Edition

By : Peter Verhas

Book Image

Java Projects - Second Edition

By: Peter Verhas

Overview of this book

Java is one of the most commonly used software languages by programmers and developers. In this book, you’ll learn the new features of Java 11 quickly and experience a simple and powerful approach to software development. You’ll see how to use the Java runtime tools, understand the Java environment, and create a simple namesorting Java application. Further on, you'll learn about advanced technologies that Java delivers, such as web programming and parallel computing, and will develop a mastermind game. Moving on, we provide more simple examples, to build a foundation before diving into some complex data structure problems that will solidify your Java 11 skills. With a special focus on the features of new projects: Project Valhalla, Project Panama, Project Amber, and Project Loom, this book will help you get employed as a top-notch Java developer. By the end of the book, you’ll have a firm foundation to continue your journey toward becoming a professional Java developer.

Preface

Who this book is for

What this book covers

To get the most out of this book

Free Chapter

Getting Started with Java 11

Getting Started with Java 11

Getting started with Java

Installing Java

Executing jshell

Packaging classes into a JAR file

Managing the running Java application

The First Real Java Program - Sorting Names

The First Real Java Program - Sorting Names

Getting started with sorting

Getting started with project structure and build tools

Setting up the project with Maven

Coding the sort

Understanding the algorithm and language constructs

Compiling and running the program

Optimizing the Sort - Making Code Professional

Optimizing the Sort - Making Code Professional

The general sorting program

A brief overview of various sorting algorithms

Project structure and build tools

Coding the sort

Creating unit tests

Collections with wrong elements

Handling exceptions

Test-Driven Development

Implementing QuickSort

Creating modules

Mastermind - Creating a Game

Mastermind - Creating a Game

The model of the game

Java collections

Dependency injection

Implementing the game

Creating an integration test

Extending the Game - Run Parallel, Run Faster

Extending the Game - Run Parallel, Run Faster

How to make Mastermind parallel

java.lang.Thread

ExecutorService

Variable access

The CPU heartbeat

Volatile variables

Synchronized block

Wait and notify

Atomic variables

IntervalGuesser

ParallelGamePlayer

Microbenchmarking

Making Our Game Professional - Do it as a Web App

Making Our Game Professional - Do it as a Web App

Web and network

The HTTP protocol

Client server and web architecture

Writing a servlet

JavaServer Pages

HTML, CSS, and JavaScript

Mastermind servlet

Running the Jetty web servlet

Other technologies

Building a Commercial Web Application Using REST

Building a Commercial Web Application Using REST

The MyBusiness web shop

Sample business architecture

Service interface design

Model View Controller

Spring framework

Service classes

Compiling and running the application

Testing the application

Servlet filters

Audit logging and AOP

Dynamic proxy-based AOP

Extending Our E-Commerce Application

Extending Our E-Commerce Application

The MyBusiness ordering

Setting up the project

Order controller and DTOs

Consistency checker

Using reflection

Functional programming in Java

Scripting in Java

Building an Accounting Application Using Reactive Programming

Building an Accounting Application Using Reactive Programming

Reactive... what?

Reactive programming in a nutshell

Reactive systems

Reactive streams

Reactive programming in Java

Finalizing Java Knowledge to a Professional Level

Finalizing Java Knowledge to a Professional Level

Java deep technologies

Programming in the enterprise

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Making Our Game Professional - Do it as a Web App

In this chapter, we will program a web application. We will build on what we have achieved already and create a web version of the Mastermind game. This time, it will not only run alone, guessing and answering the number of positions and matched colors, but also communicate with the user, asking for the answers to the guesses. This will be a real game that you can play with. Web programming is extremely important for Java developers. Most of the programs are web applications. The universal client available on the internet is the web browser. The thin-client, web browser-based architecture is widely accepted in enterprises as well. There are only a few exceptions when the architecture has something apart from the web client. If you want to become a professional Java developer, you must be familiar with web programming. And it is...