The superclass “javax.servlet.http.HttpServlet” was not found on the Java Build Path [duplicate]

Answer 1

For an Ant project:

Make sure, you have servlet-api.jar in the lib folder.

For a Maven project:

Make sure, you have the dependency added in POM.xml.

  javax.servlet
  javax.servlet-api
  3.1.0
  provided

Another way to do it is: Update the project facets to pick up the right server.

Check this box in this location:

Project → Properties → Target Runtimes → Apache Tomcat (any server)