"Builds the service() method. This service method's actual name is _jspService(). It's called by the servlet superclass' overridden service() method....."
So in case of tomcat, the super class of this servlet (which was JSP before) is HttpJspBase. This HttpJspBase is also servlet (extends HttpServlet) and has overriding service() method. Now this overriding service() method calls our _jspService() method...
I am confused, how can we call sub class' method from super class without even knowing the name of sub class???