question on session

[pvsr rao]

can we place an arraylist into session?
i know how to place the string in session.in one interview they have asked this question

[Ola Daniel]

Short answer: YES... an ArrayList can be placed in session.

[Ben Souther]

HttpSession.setAttribute's second argument type is java.lang.Object. Therefore, you can bind anything to session.

[Pradeep bhatt]

Originally posted by Ben Souther:
HttpSession.setAttribute's second argument type is java.lang.Object. Therefore, you can bind anything to session.

If you are using Java 5 you can also bind primitives becasue of the auto boxing feature.

[pvsr rao]

please send me the samplecode for placing an arraylist into session.
i have tried but iam getting classcastexception
ArrayList a= new ArrayList();
a.put("aa");

HttpSession.setAtrtribute("Arraylist","a");
please reply to this

[Darren Edwards]

The code you have posted will not cause an exception (nor will it run as HttpSession is not a variable, it's a class).

HttpSession session = request.getSession();
session.setAttribute("list", new ArrayList());
ArrayList list = [B](ArrayList)[/B]session.getAttribute("list");

[ June 20, 2006: Message edited by: Darren Edwards ]

[Kavitha Govindaraj]

Hi

ArrayList a= new ArrayList();
a.put("aa");
HttpSession.setAtrtribute("Arraylist","a");

try this..

ArrayList a= new ArrayList();
a.put("aa");
HttpSession session = request.getSession(false);
session.setAtrtribute("myArrayList","a");

Syntax:
void setAttribute(java.lang.String name, java.lang.Object value)
Binds an object to this session, using the name specified.

A simple search in Servlet API will solve your problem. So do some basic work before asking help from anyone. Sorry to be too hard. But that will really help you.

[Jaime M. Tovar]

You can place any Object in a Session but I truly recommend to store only java.io.Serializable objects.

[smith stevenson]

Thanx i was looking for the answer as well.

[trinadh reddy]

when iam retriving using getAttribute iam getting null

[Ben Souther]

Originally posted by trinadh reddy:
when iam retriving using getAttribute iam getting null

Why would you post such a short statement to the end of another thread?

If reading the discussion in this one didn't solve your problem, start a new one with a a well written question.
By well written, I mean, explain what you've done.
Use code examples if necessary (be sure to use UBB code tags if you post code).

In general, if you take some time and show some effort you stand a much better chance of getting a useful answer.