Pfthb

I wanna make a navigation between views in vaadin.
I made 2 views with html and navigator but when I initialize the first view I have a DesignException

com.vaadin.ui.declarative.DesignException: Unable to find design file MainView.html in com.andrei
at com.vaadin.ui.declarative.Design.read(Design.java:608)
at com.andrei.MainView.<init>(MainView.java:23)
at com.andrei.MyUI.init(MyUI.java:39)
at com.vaadin.ui.UI.doInit(UI.java:770)
at com.vaadin.server.communication.UIInitHandler.getBrowserDetailsUI(UIInitHandler.java:218)
at com.vaadin.server.communication.UIInitHandler.synchronizedHandleRequest(UIInitHandler.java:76)
at com.vaadin.server.SynchronizedRequestHandler.handleRequest(SynchronizedRequestHandler.java:40)
at com.vaadin.server.VaadinService.handleRequest(VaadinService.java:1601)
at com.vaadin.server.VaadinServlet.service(VaadinServlet.java:445)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)

Im tried to put html file in com.andrei directory but it not works , after that
I found infomation that html file must be in resource folder , but it dont work, again,where I must put this file , or how can I change rootPath to directory

This is my UI

@Theme("mytheme")
public class MyUI extends UI 
 Navigator navigator;
 protected static final String MAINVIEW = "main";

 @Override
 protected void init(VaadinRequest vaadinRequest) 
 navigator = new Navigator(this, this);

 // Create and register the views
 navigator.addView("", new StartView());
 navigator.addView(MAINVIEW, new MainView(navigator));



 

 @WebServlet(urlPatterns = "/*", name = "MyUIServlet", asyncSupported = true)
 @VaadinServletConfiguration(ui = MyUI.class, productionMode = false)
 public static class MyUIServlet extends VaadinServlet 
 

This is MainView:

MainView

@DesignRoot
public class MainView extends VerticalLayout implements View 
// Menu navigation button listener


VerticalLayout menuContent;
Panel equalPanel;
Button logout;

public MainView(Navigator navigator) 
 Design.read(this);

 logout.addClickListener(event ->
 navigator.navigateTo(""));


@DesignRoot
class AnimalViewer extends VerticalLayout 
 Label watching;
 Embedded pic;
 Label back;

 public AnimalViewer(String animal) 
 Design.read(this);

 watching.setValue("You are currently watching a " +
 animal);
 pic.setSource(new ThemeResource(
 "img/" + animal + "-128px.png"));
 back.setValue("and " + animal +
 " is watching you back");
 


@Override
public void enter(ViewChangeListener.ViewChangeEvent event) 

The right location is most likely /src/main/resources/com/andrei/MainView.html.