Hello.
If you want the sources for Servlet API, you shuld go to
http://tomcat.apache.org/download-60.cgi and download the Source Code Distributions.
Tomcat versions came along with a certain version of Servlet API and
JSP Spec
Servlet/JSP Spec Apache Tomcat version
2.5/2.1 6.0.x
2.4/2.0 5.5.x
2.3/1.2 4.1.x
2.2/1.1 3.3.x (archived)
so download the sources for your tomcat implementation and you'll be able to see or debug in the javax.servlet.* classes as well.
