javax.servlet.* and javax.servlet.http.* don't exist?

I am a beginner of JAVA. I have problem during the program compile. I am using WinXP and already install "j2sdk1.4.1" and "j2sdkee1.3.1". I have also set the path "SET C:\j2sdk1.4.1\bin; C:\j2sdkee1.3.1\lib;". Then try to compile a similar servlet program.

import java.io.*;

import javax.servlet.*;

import javax.servlet.http.*;

public class HW extends HttpServlet {}

When I tried to compile it "javac HW.java", it prompted

"HW.java2: package javax.servlet does not exist"

"HW.java3: package javax.servlet.http does not exit"

Please! could any expert help a new babe? Seems can't recognize location of package.

soncat at 2007-7-4 1:39:00 >