when i complied servlet in Jcreator i am getting this errors.

i also set CLASSPATH in environment variable as
C:\Program Files\Java\Tomcat 6.0\lib\servlet-api.jar
till  i am getting following errors i follow all the instructions steps .

C:\Program Files\Java\Tomcat 6.0\webapps\examples\WEB-INF\classes\ps.java:1: package javax.servlet does not exist
import javax.servlet.*;
^
C:\Program Files\Java\Tomcat 6.0\webapps\examples\WEB-INF\classes\ps.java:4: cannot find symbol
symbol: class Servlet
public class  ps implements  Servlet {
                             ^
C:\Program Files\Java\Tomcat 6.0\webapps\examples\WEB-INF\classes\ps.java:5: cannot find symbol
symbol  : class ServletConfig
location: class ps
public void init(ServletConfig cf)  throws ServletException
                 ^
C:\Program Files\Java\Tomcat 6.0\webapps\examples\WEB-INF\classes\ps.java:5: cannot find symbol
symbol  : class ServletException
location: class ps
public void init(ServletConfig cf)  throws ServletException
                                           ^
C:\Program Files\Java\Tomcat 6.0\webapps\examples\WEB-INF\classes\ps.java:9: cannot find symbol
symbol  : class ServletRequest
location: class ps
 public void service(ServletRequest request,
                     ^
C:\Program Files\Java\Tomcat 6.0\webapps\examples\WEB-INF\classes\ps.java:10: cannot find symbol
symbol  : class ServletResponse
location: class ps
                    ServletResponse response)
                    ^
C:\Program Files\Java\Tomcat 6.0\webapps\examples\WEB-INF\classes\ps.java:11: cannot find symbol
symbol  : class ServletException
location: class ps
      throws ServletException, IOException {
             ^
C:\Program Files\Java\Tomcat 6.0\webapps\examples\WEB-INF\classes\ps.java:24: cannot find symbol
symbol  : class ServletConfig
location: class ps
public ServletConfig getServletConfig()
       ^
8 errors