Cant use cookies in servlet

Question

I can't use cookie in my Servlet upon Tomcat.
When I reach the statement "cookies.length" in code a NullPointerException is generated.
Logfile according to:
2003-05-22 02:51:55 StandardContext[pk]: Reloading this Context is completed
2003-05-22 02:51:55 HTMLManager: list: Listing contexts for virtual host 'localhost'
2003-05-22 02:52:03 StandardWrapperValve[pk]: Servlet.service() for servlet pk threw exception
java.lang.NullPointerException
at calender.pk.doGet(pk.java:34)
I guess my problem might be that cookies is not enabled but I can't solve it.
My web.xml is :
<?xml version="1.0" encoding="ISO-8859-1"?>
<web-app>
<servlet>
<servlet-name>pk</servlet-name>
<servlet-class>calender.pk</servlet-class>
<init-param>
<param-name>Cookies</param-name>
<param-value>True</param-value>
</init-param>
</servlet>
<servlet-mapping>
<servlet-name>pk</servlet-name>
<url-pattern>/pk</url-pattern>
</servlet-mapping>
</web-app>

Answer 1

Here is my code. The problem occurs when deplying onto tomcat4.1.10. When running servlet from DevelopmentEnvironment(JBuilder5) everything works fine.
package calender;
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import java.util.*;
public class pk extends HttpServlet {
private static final String CONTENT_TYPE = "text/html";
private static final String STARTPAGE = "startpage";
private static final String LOGIN = "login";
private static final String CHECK = "check";
private static final String USERNAME = "username";
private static final String WELCOME = "welcome";
private String welcome = "false";
int responseCode;
public void init() throws ServletException {
public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
//Debugger.debug("get start");
response.setContentType(CONTENT_TYPE);
PrintWriter out = response.getWriter();
String function = request.getParameter("function");
Cookie cookies[] = request.getCookies();
String username = "";
Actionhandler handler = new Actionhandler();
for(int i=0;i<cookies.length;i++){
Debugger.debug("cookieloop i get");
if(cookies.getName().equals("welcome")){
welcome = cookies[i].getValue();
}else if(cookies[i].getName().equals("username")){
username =cookies[i].getValue();
if(welcome.equals("true") && username != null && username != ""){
if(function != null){
if(function.equals("add_worker_to_happening") ||
function.equals("remove_all_workers_from_happening")||
function.equals("change_to_status_ready")){
handler.setHc_id(Integer.parseInt(request.getParameter("hc_id")));
}else if(function.equals("remove_worker_from_happening")){
handler.setWh_id(Integer.parseInt(request.getParameter("wh_id")));
}else if(function.equals("remove_happening")){
handler.setH_id(Integer.parseInt(request.getParameter("h_id")));
responseCode = handler.getPage(request, response, username, function);
}else{
responseCode = handler.getPage(request, response, username, STARTPAGE);
}else{
responseCode = handler.getPage(request, response, username, LOGIN);
if(handler.getHTML() == null){
handler.getResponse().getWriter().write("no output");
else handler.getResponse().getWriter().write(handler.getHTML());