Why do I see /servlet/com.example.documentmanager.DocUI$Servlet In the URI

Vaadin 6 / 7 / 8
1

Hi everyone, I am new to Vaadin, I have a question related to URIs and Vaadin:

Whe I run the application the URL shold be:

http://localhost:8080/Document_Manager/

But instead is:

http://localhost:8080/Document_Manager/servlet/com.example.documentmanager.DocUI$Servlet

Why that /servlet/com.example.documentmanager.DocUI$Servlet string is added to the URI?