Error in code compiling

Question

Hi this is the error i am getting while compiling
C:\>javac SessionListener.java
SessionListener.java:17: <identifier> expected
    private static Map<String,HttpSession> sessionMX = new HashMap<String,HttpSe
ssion>();
                      ^
SessionListener.java:60: <identifier> expected
    public static Set<String> getActiveSessionids(){
                     ^
SessionListener.java:118: ';' expected
^
3 errorsthis is the code which i am compiling so can you suggest me something....
thanks in advance
package com.listeners;
import java.util.Map;
import java.util.HashMap;
import java.util.Collections;
import java.util.Set;
import javax.servlet.http.HttpSession;
import javax.servlet.http.HttpSessionListener;
import javax.servlet.http.HttpSessionEvent;
public class SessionListener implements HttpSessionListener{
    /*Usage of a Static Collection Object is what the other Poster is talking about*/
    private static Map<String,HttpSession> sessionMX = new HashMap<String,HttpSession>();   
    /*Called @time when a new session is created */
    public void sessionCreated(HttpSessionEvent se){
        HttpSession session = se.getSession();
        sessionMX.put(session.getId(),session);
    /*Called @time when an existing session is being destroyed */
    public void sessionDestroyed(HttpSessionEvent se){
        HttpSession session = se.getSession();
        sessionMX.remove(session.getId());
    /* Utility Methods */
     * Returns number os active sessions
    public static int getNoActiveSessions(){
        return sessionMX.size();
     * Returns a Set of Active SessionIds
    public static Set<String> getActiveSessionids(){
        return sessionMX.keySet();
     * Returns whether there is any Active Session or not
    public static boolean isActive(String sessionId){
        return sessionMX.containsKey(sessionId);
     * Returns associated session for specified sessionID
     * if not found returns 'null'
    public static HttpSession getAssociatedSession(String sessionId){
        HttpSession session = null;
        if(isActive(sessionId))
            session = sessionMX.get(sessionId);
        return session;
     * Invalidates the specified session with consequent sessionID
     * returns true if succeful else returns false
    public static boolean force2Invalidate(String sessionId){
        boolean flag = false;
        if(isActive(sessionId)){
            sessionMX.get(sessionId).invalidate();
            flag = true;
        return flag;
}

Answer 1

What version of the javac compiler are you using? To use generics it needs to be 1.5 or later