You'll get the most out of this book if you already have some kind of experience with the Vaadin Framework. If you don't, go through the official online tutorial at https://vaadin.com/docs/v8/framework/tutorial.html before continuing with this book.

In order to use the companion code, you need the Java SE Development Kit and Java EE SDK version 8 or later. You also need Maven version 3 or later. A Java IDE with Maven support, such as IntelliJ IDEA, Eclipse, or NetBeans is recommended.

You can download the example code files for this book from your account at www.packtpub.com. If you purchased this book elsewhere, you can visit www.packtpub.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.packtpub.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/Data-Centric-Applications-with-Vaadin-8. 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: http://www.packtpub.com/sites/default/files/downloads/DataCentricApplicationswithVaadin8_ColorImages.pdf.

Visit the following link to check out videos of the code being run:
https://goo.gl/qFmc3L

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 application should be available at http://localhost:8080."

A block of code is set as follows:

LoginForm loginForm = new LoginForm()
loginForm.addLoginListener(e ->  {
    String password = e.getLoginParameter("password");
    String username = e.getLoginParameter("username");
    ...
});

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

LoginForm loginForm = new LoginForm() {
    @Override
    protected Component createContent(TextField username,
            PasswordField password, Button loginButton) {

        CheckBox rememberMe = new CheckBox();
        rememberMe.setCaption("Remember me");

        return new VerticalLayout(username, password, loginButton,
                rememberMe);
    }
};

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

cd Data-centric-Applications-with-Vaadin-8
mvn install

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: "Select System info from the Administration panel."