:index-group: Frameworks
:jbake-type: page
:jbake-status: published

== Vaadin V8 (LTS) - Simple WebApp in Java

This demo will show how to start with a simple Vaadin V8 webapp, based
on pure Java API running on TomEE (webprofile)

The Vaadin Framework is OpenSource and available at
https://github.com/vaadin/framework[Github]

=== Build this example

To build this example, just run _mvn clean install tomee:run_ You will
find the app running under http://localhost:8080/

=== Implementation

This implementation is using the https://vaadin.com/framework[Vaadin 8
API].

[source,java]
----
public class HelloVaadin {

    public static class MyUI extends UI {
        @Override
        protected void init(VaadinRequest request) {

            //create the components you want to use
            // and set the main component with setContent(..)
            final Layout layout = new VerticalLayout();
            layout
                .addComponent(new Button("click me",
                                         event -> layout.addComponents(new Label("clicked again"))
                ));

            //set the main Component
            setContent(layout);
        }

        @WebServlet("/*")
        @VaadinServletConfiguration(productionMode = false, ui = MyUI.class)
        public static class MyProjectServlet extends VaadinServlet { }
    }
}
----

The documentation of the Vaadin Framework is available
https://vaadin.com/docs/v8/framework/tutorial.html[here]

=== Support Information’s

Vaadin Framework 8 is the latest version based on GWT. V8 itself is a
LTS version.

The new Vaadin Platform is based on WebComponents. As of Vaadin 10,
Vaadin is moving to a release train model with four major releases every
year. This allows them to ship new features faster to developers. Vaadin
is continuing their commitment to long-term stability with long-term
support (LTS) releases. The LTS releases will come out approximately
every two years and offer 5 years of support.