Vaadin ServletException: Failed to load application class

Question

I have a vaadin and servlet error when i try to load the servlet in the browser by localhost/testVaadin/

I want to execute this sample to see how vaadin works, because I

Answer 1

Basically the error message is saying com.vaadin.terminal.gwt.server.ApplicationServlet tried to load com.example.testvaadin.SimpleAddressBook during initialisation and didn't succeed.

To resolve this try the following:

• check if the application deployment succeeded and the class: SimpleAddressBook is really in the right place in your servlet container
• check if there is a vaadin-xx.yy.zz.jar in WEB-INF/lib
• clean and rebuild the entire project