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Fast Track to OOP - Classes and Interfaces

In this chapter, we will cover the following recipes:

Implementing Object-Oriented Design (OOD)
Using inner classes
Using inheritance and aggregation
Coding to an interface
Creating interfaces with default and static methods
Creating interfaces with private methods
A better way to work with nulls using Optional
Using the utility class Objects

The recipes in this chapter do not require any prior knowledge of OOD. However, some experience of writing code in Java would be beneficial. The code samples in this chapter are fully functional and compatible with Java 11. For better understanding, we recommend that you try to run the presented examples.

We also encourage you to adapt the tips and recommendations in this chapter to your needs in the context of your team experience. Consider sharing your newfound knowledge with your colleagues...

Key benefits

Explore the latest features of Java 11 to implement efficient and reliable code

Develop memory-efficient applications, understanding new garbage collection in Java 11

Create restful webservices and microservices with Spring boot 2 and Docker

Description

For more than three decades, Java has been on the forefront of developing robust software that has helped versatile businesses meet their requirements. Being one of the most widely used programming languages in history, it’s imperative for Java developers to discover effective ways of using it in order to take full advantage of the power of the latest Java features. Java 11 Cookbook offers a range of software development solutions with simple and straightforward Java 11 code examples to help you build a modern software system. Starting with the installation of Java, each recipe addresses various problem by explaining the solution and offering insights into how it works. You’ll explore the new features added to Java 11 that will make your application modular, secure, and fast. The book contains recipes on functional programming, GUI programming, concurrent programming, and database programming in Java. You’ll also be taken through the new features introduced in JDK 18.3 and 18.9. By the end of this book, you’ll be equipped with the skills required to write robust, scalable, and optimal Java code effectively.

What you will learn

Set up JDK and understand what s new in the JDK 11 installation

Implement object-oriented designs using classes and interfaces

Manage operating system processes

Create a modular application with clear dependencies

Build graphical user interfaces using JavaFX

Use the new HTTP Client API

Explore the new diagnostic features in Java 11

Discover how to use the new JShell REPL tool

What do you get with Print?

Instant access to your digital eBook copy whilst your Print order is Shipped

Paperback book shipped to your preferred address

Download this book in EPUB and PDF formats

Access this title in our online reader with advanced features

DRM FREE - Read whenever, wherever and however you want

Frequently bought together

Java 11 Cookbook

Sep 2018 802 pages

1 (1)

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Can$38.99 ~~Can$55.99~~

Mastering Java 11

Sep 2018 462 pages

1 (2)

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Java Projects

Aug 2018 524 pages

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Total Can$ 193.97

JK Oregon Dec 07, 2019

I don't understand how this book made it into print. It is filled with errors and awful advice. Almost ever few pages I want to set the book on fire.For example, let's look at the treatment of 'var' which was added in Java 10. The authors list all the different ways you can use var, including (cover your eyes):var var = 1:andpackage com.packt.cookbook.var:Why would you even suggest the first example or include the completely irrelevant second one?Next example: They discuss the Epsilon garbage collector (which is used for tuning and actually never collects garbage). They write an overly complex loop to allocate 4GB and they run it with a 4GB heap. When the allocations cause a memory error, they simply assert that is what they were expecting. That a reader unfamiliar with GC would want to know why allocating the full available space would cause an error apparently doesn't cross their minds. The reader is left to guess why they were expecting it. To top it off, as printed, the command-line options to run Epsilon contain a typo.Their discussion of Optional: "It was intended to help avoid the dreaded NullPointerException. But so far, the introduction of Optional helped to accomplish it only to a degree and mostly in the area of streams" They later repeat that it's not terribly useful when not used in streams. But they don't understand that *the whole intent* of Optional was precisely to be used in collections and streams. So the repeated complaints and general dismissal of Optional demonstrate ignorance rather than insight. Optional is a super-useful tool when working with streams.Even facts that would have been trivial to check are wrong (and this is a second edition!). For example, the first sentence on the back cover: "For more than three decades, Java has been at the forefront..." Java is about to celebrate its 25th birthday. More than three decades?The whole book is like this. I can't say that every page has a technical problem, but many sections do.Finally, there is the language. Neither author is a native speaker nor is the technical editor. And apparently no editor cleaned up the language after the authors turned in the drafts. There are many twisted sentences, others where subjects or verbs are missing, others where an expression is misused--all leading to frustrating lack of clarity at crucial points.Top to bottom, this book should be avoided.If you're looking for a good recipe book, I recommend Ken Kousen's "Modern Java Recipes" It doesn't go through Java 11, but everything in it is technically correct and the writing is clear.

Amazon Verified review

Java 11 Cookbook: A definitive guide to learning the key concepts of modern application development , Second Edition

What do you get with Print?

Java 11 Cookbook

Fast Track to OOP - Classes and Interfaces

Introduction

Implementing object-oriented design (OOD)

Getting ready

Using inner classes

Using inheritance and aggregation

Getting ready

Coding to an interface

Getting ready

Creating interfaces with default and static methods

Getting ready

Creating interfaces with private methods

Getting ready

A better way to work with nulls using Optional

Getting ready

Introduction

Page 1 of 10

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What you will learn

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Java 11 Cookbook: A definitive guide to learning the key concepts of modern application development , Second Edition

What do you get with Print?

Key benefits

Description

Who is this book for?

What you will learn

Product Details

What do you get with Print?

Product Details

Packt Subscriptions

Frequently bought together

Table of Contents

Recommendations for you

Customer reviews

People who bought this also bought

About the authors

FAQs