The reader should have a familiarity with Java and be capable of writing, compiling, and executing Java applications. In order to execute the examples in this book, the reader should have access to a 64-bit version of Windows 7 (SP1), 8, or 10; a Mac with macOS 10.11 or higher; or a computer running Linux GNOME or KDE desktop.

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-Design-Patterns-with-Java. 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!

We also provide a PDF file that has color images of the screenshots/diagrams used in this book. You can download it here: https://www.packtpub.com/sites/default/files/downloads/9781789809770_ColorImages.pdf.

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: "Next, we have the Mother class, which extends Grandmother and has its own constructor method."

A block of code is set as follows:

    Mother() {
        System.out.println("Mother constructor executed.");
    }
}

When we wish to draw your attention to a particular part of a code block, the relevant lines or items are set in bold:

public abstract class MotorHomeAbstractFactory {
    public abstract Frame createFrame();
    public abstract Style createStyle();
    public abstract Engine createEngine();
    public abstract Kitchen createKitchen();
}

Bold: Indicates a new term, an important word, or words that you see onscreen. For example, words in menus or dialog boxes appear in the text like this. Here is an example: "Beneath the Receive Order node is a horizontal black bar referred to as a fork."