Tomcat failed to start after editing web.xml file.

By: monika*** On: Sat Nov 14 16:49:36 IST 2015     0 0 0	0
i create servlet for login using requestdispatcher. i have done everything you showed us in example . before servlet mapping in web.xml tomcat runs fine ut after that it shows error tomcat failed to start. what to do. my servlet program is in default package. and here is my web.xml file:: <web-app> <welcome-file-list> <welcome-file>index.html</welcome-file> </welcome-file-list> <servlet> <servlet-name> Validate</servlet-name> <servlet-class>default.Validate</servlet-class> </servlet> <servlet> <servlet-name>Welcome</servlet-name> <servlet-class>Welcome</servlet-class> </servlet> <servlet-mapping> <servlet-name>Validate</servlet-name> <url-pattern>/Validate</url-pattern> </servlet-mapping> <servlet-mapping> <servlet-name>welcome</servlet-name> <url-pattern>/Welcome</url-pattern> </servlet-mapping> </web-app>	0