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Java Projects

By : Peter Verhas

1.9 (9)

Buy this Book

Java Projects

1.9 (9)

By: Peter Verhas

Buy this Book

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

Get in touch

Free Chapter

Getting Started with Java 11

Getting started with Java

Installing Java

Executing jshell

Packaging classes into a JAR file

Managing the running Java application

Using an IDE

Summary

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

Summary

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

Generics

Test-Driven Development

Implementing QuickSort

Creating modules

Summary

Mastermind - Creating a Game

The game

The model of the game

Java collections

Dependency injection

Implementing the game

The Game class

Creating an integration test

Summary

Extending the Game - Run Parallel, Run Faster

How to make Mastermind parallel

Refactoring

Processes

Threads

Fibers

java.lang.Thread

Pitfalls

ExecutorService

Variable access

The CPU heartbeat

Volatile variables

Synchronized block

Wait and notify

Lock

Atomic variables

BlockingQueue

IntervalGuesser

ParallelGamePlayer

Microbenchmarking

Summary

Making Our Game Professional - Do it as a Web App

Web and network

The HTTP protocol

HTTP/2

Client server and web architecture

Writing a servlet

JavaServer Pages

HTML, CSS, and JavaScript

Mastermind servlet

Running the Jetty web servlet

Logging

Other technologies

Summary

Building a Commercial Web Application Using REST

The MyBusiness web shop

Sample business architecture

Microservices

Service interface design

JSON

REST

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

Summary

Extending Our E-Commerce Application

The MyBusiness ordering

Setting up the project

Order controller and DTOs

Consistency checker

Annotations

Using reflection

Functional programming in Java

Scripting in Java

Summary

Building an Accounting Application Using Reactive Programming

Reactive... what?

Reactive programming in a nutshell

Reactive systems

Reactive streams

Reactive programming in Java

Summary

Finalizing Java Knowledge to a Professional Level

Java deep technologies

Programming in the enterprise

Summary

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The First Real Java Program - Sorting Names

In the previous chapter, we got acquainted with Java, and especially with using the REPL tool and interactively executing some simple code. That is a good start, but we need more. In this chapter, we will develop a simple program. Using this code as an example, we will look at different build tools, which are frequently used for Java projects, and learn the basic features of the Java language.

This chapter will cover the following topics: