To get the most out of this book

To run examples from this book, you will need a computer running Windows, Linux, or macOS. You will also need IntelliJ IDEA (the Ultimate edition version is preferable), and Android Studio. You will need a basic knowledge of GitHub and Git to clone a project with examples.

Since Kotlin is an official language of Android development, Android Studio supports this language out of the box. For IntelliJ IDEA, you need to install a plugin that is available for download from https:/​/​plugins.​jetbrains.​com/​plugin/​6954-​kotlin.

Download the example code files

You can download the example code files for this book from your account at www.packt.com. If you purchased this book elsewhere, you can visit www.packt.com/support and register to have the files emailed directly to you.

You can download the code files by following these steps:

1. Log in or register at www.packt.com.
2. Select the SUPPORT tab.
3. Click on Code Downloads & Errata.
4. Enter the name of the book in the Search box and follow the onscreen instructions.

Once the file is downloaded, please make sure that you unzip or extract the folder using the latest version of:

• WinRAR/7-Zip for Windows
• Zipeg/iZip/UnRarX for Mac
• 7-Zip/PeaZip for Linux

The code bundle for the book is also hosted on GitHub at https://github.com/PacktPublishing/Hands-On-Object-Oriented-Programming-with-Kotlin. In case there's an update to the code, it will be updated on the existing GitHub repository.

We also have other code bundles from our rich catalog of books and videos available at https://github.com/PacktPublishing/. Check them out!

Conventions used

There are a number of text conventions used throughout this book.

CodeInText: Indicates code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles. Here is an example: "The Builder pattern assumes that we use the nested Builder class that obtains all arguments and creates a new instance."

A block of code is set as follows:

val range = 1..10
for (value in range){
     println(value)
}

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

User(preferences=User Preference Node: /User, id=1, firstName=Igor, lastName=Kucherenko)

Bold: Indicates a new term, an important word, or words that you see on screen. For example, words in menus or dialog boxes appear in the text like this. Here is an example: "In the IntelliJ IDEA menu, click on Tools | Kotlin | Show Kotlin Byte code, and press Decompile."

Warnings or important notes appear like this.

Tips and tricks appear like this.