Hi, which ide and server are you working with?
If the server is tomcat, search the following tag in web.xml file in the config directory where you have the tomcat installed
<welcome-file-list>
<welcome-file>index.html</welcome-file>
<welcome-file>index.htm</welcome-file>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
In the same directory but in the sever xml, specifies the port, in this case 8080
if you use eclipse as ide click with right button on project web-> properties --> tomcat --> context name this context name appears in directions bar of your browser, don't write nothing.