Can't compile my first servlet program

hi guys,
there are some problems with compiling the first servlet program(helloservlet).
the error is following
C:\SERVLET-CODE\hello1>javac HelloServlet.java
HelloServlet.java:4: package javax.servlet does not exist
import javax.servlet.*;
^
HelloServlet.java:5: package javax.servlet.http does not exist
import javax.servlet.http.*;
^
HelloServlet.java:15: cannot resolve symbol
symbol : class HttpServlet
location: class HelloServlet
public class HelloServlet extends HttpServlet {
^
HelloServlet.java:16: cannot resolve symbol
symbol : class HttpServletRequest
location: class HelloServlet
public void doGet(HttpServletRequest request,
^
HelloServlet.java:17: cannot resolve symbol
symbol : class HttpServletResponse
location: class HelloServlet
HttpServletResponse response)
^
HelloServlet.java:18: cannot resolve symbol
symbol : class ServletException
location: class HelloServlet
throws ServletException, IOException {
^
6 errors
i don't know why it can not find the import java.*
and i already set up the classpath
and my code is
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
/** Simple servlet used to test server.
* <P>
* Taken from More Servlets and JavaServer Pages
* from Prentice Hall and Sun Microsystems Press,
* http://www.moreservlets.com/.
* © 2002 Marty Hall; may be freely used or adapted.
public class HelloServlet extends HttpServlet {
public void doGet(HttpServletRequest request,
HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html");
PrintWriter out = response.getWriter();
String docType =
"<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.0 " +
"Transitional//EN\">\n";
out.println(docType +
"<HTML>\n" +
"<HEAD><TITLE>Hello</TITLE></HEAD>\n" +
"<BODY BGCOLOR=\"#FDF5E6\">\n" +
"<H1>Hello</H1>\n" +
"</BODY></HTML>");
please help me out of it...
thank you all...

hi man,
thanks for the classpath, and i already did it in system environment.
but it can not work either...
do i really have to download the API, so where i have to put it after i download it...

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Message was edited by:
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