How to set request attribute on JSP page

Hi All

I am facing a strange problem.I am not able to set a value in a request using request.setAttribute() method on a jsp page so I am not able to get it on the action class .I tried and it gives null pointer exception.

I need argent help...

Thanks in advance

Regards
Kanchan

Please put the code snippet here...otherwise how anyone can really tell, what mistake you are making.

My code is as flow
in Action class

List list1=new Arraylist();
request.setAttribute("Test", list1);

in JSP psge
<%
List l1=new Arraylist();
l1=(List)request.getAttribute("Test");
request.setAttribute("Test",l1);
%>

in action class
List l2=new Arraylist();
List l2=request.getAttribute("Test");

at last line here it gives me null pointer exception......

Regards
Kanchan

One question before i take thorough look. You are using Arraylist instead of ArrayList. Is it typo error here or the same way you are using in your prog?

Your request object in the JSP is the object forwarded from the action , but that request will end and a new request object will be created when you submit your jsp with form elements as the request attributes.

i agree to what karthik says but to me it looks like you are setting it in the request object when the page is rendered . if this is a form submit it should definitely be available in the action class . i would ensure you do a form submit . if it still a problem put a hidden field on the page and store the value during load . in that way i think you can use request.getParameter('hidden variable name').