Time for action – reading request parameters

Follow these steps and see how easy it is to use request parameters in Vaadin:

1. Create a new Vaadin project. We are using website2 as project name.

2. Code your UI class shown as follows:

   public class Website2UI extends UI {
   
     protected void init(VaadinRequest request) {
       final VerticalLayout layout = new VerticalLayout();
       layout.setMargin(true);
       setContent(layout);
   
       String page = request.getParameter("page");
   
       if (page == null) {
         layout.addComponent(new Label("Welcome to Simple Web Site"));
         getPage().setTitle("Simple Web Site");
   
       } else if ("1".equals(page)) {
         layout.addComponent(
             new Label("Oh yeah! You are watching Page 1!"));
         getPage().setTitle("Simple Web Site - Page 1");
   
       } else if ("2".equals(page)) {
         layout.addComponent(new Label("Yay! This is Page 2!"));
         getPage().setTitle("Simple Web Site - Page 2");
   
       } else {
         getPage().setTitle("Simple Web Site - 404!");
    ...