Servlets Java

package com.ack.web.servlet;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Date;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
public class GetServletSessionTimeInfo extends HttpServlet {
public void doGet( HttpServletRequest req, HttpServletResponse res )
throws ServletException, IOException {
res.setContentType( "text/html" );
PrintWriter pw = res.getWriter();
pw.println( "" );
// get session, and create it if one doesn't already exist
HttpSession theSession = req.getSession();
// get session id and it's max lifetime in seconds
pw.println( "
Session Id: " + theSession.getId() );
pw.println( "
Session Max Inactive Time (seconds): "
+ theSession.getMaxInactiveInterval() );
// get creation time
long dateTimes = theSession.getCreationTime();
pw.println( "
Session Creation Time: " + new Date( dateTimes ) );
// get last access time, negative if never been accessed
dateTimes = theSession.getLastAccessedTime();
if( dateTimes < 0 ) {
pw.println( "
Session Last Access Time: Never Been Access Befored" );
}
else {
pw.println( "
Session Last Access Time: " + new Date( dateTimes ) );
}
pw.println( "" );
}
}