Conventions

In this book, you will find a number of styles of text that distinguish between different kinds of information. Here are some examples of these styles, and an explanation of their meaning.

Code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles are shown as follows: "Now we can try to change the code inside the HellovaadinUI class, so the application prints out the name of the system user."

A block of code is set as follows:

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">
    <display-name>Vaadin Web Application</display-name>
    <context-param>
        <description>Vaadin production mode</description>
        <param-name>productionMode</param-name>
        <param-value>false</param-value>
    </context-param>
    <servlet>
     <servlet-name>Vaadin Application Servlet</servlet-name>
     <servlet-class>com.vaadin.server.VaadinServlet</servlet-class>
     <init-param>
        <description>Vaadin UI to display</description>
        <param-name>UI</param-name>
        <param-value>app.MyVaadinUI</param-value>
     </init-param>
    </servlet>
    <servlet-mapping>
      <servlet-name>Vaadin Application Servlet</servlet-name>
      <url-pattern>/*</url-pattern>
    </servlet-mapping>
</web-app>

New terms and important words are shown in bold. Words that you see on the screen, in menus or dialog boxes for example, appear in the text like this: "There should be a few Vaadin wizards listed. Choose Vaadin 7 Project and click on the Next button."

Note

Warnings or important notes appear in a box like this.

Tip

Tips and tricks appear like this.