Why do I get these errors?

Question

C:\jakarta-tomcat-4.1.29\webapps\projecttest\WEB-INF\classes\com\stardeveloper\web\listener\SessionCounter.java:6: package javax.servlet.http does not exist
import javax.servlet.http.HttpSessionListener;
^
C:\jakarta-tomcat-4.1.29\webapps\projecttest\WEB-INF\classes\com\stardeveloper\web\listener\SessionCounter.java:7: package javax.servlet.http does not exist
import javax.servlet.http.HttpSessionEvent;
^
C:\jakarta-tomcat-4.1.29\webapps\projecttest\WEB-INF\classes\com\stardeveloper\web\listener\SessionCounter.java:9: cannot resolve symbol
symbol : class HttpSessionListener
location: class com.stardeveloper.web.listener.SessionCounter
public class SessionCounter implements HttpSessionListener {
^
C:\jakarta-tomcat-4.1.29\webapps\projecttest\WEB-INF\classes\com\stardeveloper\web\listener\SessionCounter.java:13: cannot resolve symbol
symbol : class HttpSessionEvent
location: class com.stardeveloper.web.listener.SessionCounter
     public void sessionCreated(HttpSessionEvent se) {
^
C:\jakarta-tomcat-4.1.29\webapps\projecttest\WEB-INF\classes\com\stardeveloper\web\listener\SessionCounter.java:17: cannot resolve symbol
symbol : class HttpSessionEvent
location: class com.stardeveloper.web.listener.SessionCounter
     public void sessionDestroyed(HttpSessionEvent se) {
Can anyone help?

Answer 1

I'm just compiling the following java file ..
     SessionCounter.java
package com.stardeveloper.web.listener;
import javax.servlet.http.HttpSessionListener;
import javax.servlet.http.HttpSessionEvent;
public class SessionCounter implements HttpSessionListener {
     private static int activeSessions = 0;
     public void sessionCreated(HttpSessionEvent se) {
          activeSessions++;
     public void sessionDestroyed(HttpSessionEvent se) {
          if(activeSessions > 0)
               activeSessions--;
     public static int getActiveSessions() {
          return activeSessions;
Whether I use jedit or command line it still gives the same errors