Java EE (Java Enterprise Edition) General Discussion

I keep getting this error:

'The requested resource (/servlet/HelloServlet) is not available'. (404)
The servlet is not getting located by tomcat for some reason. This happens when I go to localhost:8080/servlet/HelloServlet. (or localhost/HelloServlet)
The servlet engine is running, tomcat is running.

I did this:

javac -classpath /usr/local/tomcat/apache-tomcat-6.0.14/lib/servlet-api.jar HelloServlet.java

and I was able to at least compile the servlet into a .class file.

If you have tomcat installed, there should be an html document on how to configure it somewhere like here :
file:///usr/local/tomcat/apache-tomcat-6.0.14/webapps/docs/config/server.html
I've been studying this document trying to figure out what I need to do, but so far to no avail.

I added the folowing Context element to my context.xml, located in $CATALINA_HOME/conf:

<Context path="" docBase="webapps/ROOT" debug="0" reloadable="true"

crossContext="true">
</Context>


My HelloServlet.class is located in .../webapps/ROOT/WEB-INF/classes
In addition I added the following element to the bottom of my
..../webapps/ROOT/WEB-INF/web.xml to try to provide some sort of servlet mapping, I think:

<servlet>
<servlet-name>HelloWorld</servlet-name>
<servlet-class>HelloWorld</servlet-class>
</servlet>

I got this info mostly from doing Google research, so I dont know
how well this applies. The only thing I can think of at this point is maybe I need to set my
java -classpath also, but attempts to set it to my .../classes directory
fail. I'm not sure exactly what it needs to be set to, and if you have
to provide a .class filename every time. Could anybody help clarify
some of this ? I'm tired of just guessing from incomplete info and not getting anywhere. Thanx