Can't find ServletContext.getContextPath()

[aladdin]

I have the following two lines of code in a context listener:

        ServletContext sc= e.getServletContext(); // e is a ServletContextEvent
        log.write("AppInitializer::ContextInitializer: context name='" + 
sc.getServletContextName() + "'");
        log.write("AppInitializer::ContextInitializer: context path='" + 
sc.getContextPath() + "'");

When I try to compile this, I get:
./src/utils/AppInitializer.java:33: cannot find symbol
symbol  : method getContextPath()
location: interface javax.servlet.ServletContext
        log.write("AppInitializer::ContextInitializer: context path='" + 
sc.getContextPath() + "'");

Why is it not finding the function (and only the function) 
ServletContext.getContextPath()?  It's the first time I've used this function, 
but it is typed (I think; maybe I'm going crazy- too much programming, ya' 
know) exactly as it appears in the Sun J2EE documentation.

TIA,
Allen