Time for action – using navigators

Let's pour some architectural sugar:

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

2. Implement a view for the Welcome page:

   public class Welcome extends VerticalLayout implements View {
     public Welcome() {
       addComponent(new Label("Welcome"));
     }
   
     @Override
     public void enter(ViewChangeEvent event) {
       Notification.show("Showing Welcome page");
     }
   
   }

3. Implement a view for the Page1 class:

   public class Page1 extends VerticalLayout implements View {
   
     public Page1() {
       addComponent(new Label("Page 1"));
     }
   
     @Override
     public void enter(ViewChangeEvent event) {
       Notification.show("Showing page 1");
     }
   
   }

4. Use the previous Page1 class to implement a Page2 class. Don't forget to change the label content and the notification accordingly.

5. Now, change your UI class to this:

   public class NavigatorUI extends UI {
   
     protected void init(VaadinRequest request) {
       Navigator navigator = new Navigator(this, this);
       
       navigator...