Problem with HttpSessionListener

I'm getting error with the following code...Can anybody help me in this?

import java.util.*;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.*;

import javax.servlet.http.HttpSessionEvent;

import java.sql.* ;

public class SessionTimeoutNotifier implements HttpSessionListener,HttpSessionBindingListener

{

public void valueBound(HttpSessionBindingEvent event)

{

System.out.println("The session has started : "+event.getSession().getId());

}

public void sessionCreated(HttpSessionEvent se)

{

System.out.println( "Session with id " + se.getSession().getId() + " created!" ) ;

}

public void sessionDestroyed(HttpSessionEvent se)

{

System.out.println( "Session with id " + se.getSession().getId() + " destroyed!" ) ;

}

Error is

/SessionTimeoutNotifier.java:8: cannot resolve symbol

[javac] symbol : class HttpSessionEvent

[javac] location: package http

[javac] import javax.servlet.http.HttpSessionEvent;

[javac]^

SessionTimeoutNotifier.java:11: cannot resolve symbol

[javac] symbol : class HttpSessionListener

[javac] location: class com.equifax.apply.usaa.SessionTimeoutNotifier

[javac] public class SessionTimeoutNotifier implements HttpSessionListener,HttpSessionBindingListener

[javac]^

SessionTimeoutNotifier.java:28: cannot resolve symbol

[javac] symbol : class HttpSessionEvent

[javac] location: class com.equifax.apply.usaa.SessionTimeoutNotifier

[javac] public void sessionCreated(HttpSessionEvent se)

[javac]^

SessionTimeoutNotifier.java:33: cannot resolve symbol

[javac] symbol : class HttpSessionEvent

[javac] location: class com.equifax.apply.usaa.SessionTimeoutNotifier

[javac]public void sessionDestroyed(HttpSes

I'm using jdk1.3 ..

[1948 byte] By [techstudenta] at [2007-10-3 4:30:25]
# 1
Multiple posf http://forum.java.sun.com/thread.jspa?threadID=766624&tstart=0
cotton.ma at 2007-7-14 22:33:39 > top of Java-index,Java Essentials,Java Programming...
# 2
Double-post, still not formatted. http://forum.java.sun.com/thread.jspa?threadID=766624
CeciNEstPasUnProgrammeura at 2007-7-14 22:33:39 > top of Java-index,Java Essentials,Java Programming...