Member Avatar for ARaza110

Hi,
I have a problem related to Java servlet sessions. I don't understand why the getAttribute() function of the session object is used before setAttribute(); Here is the code:

Vector buylist=(Vector)session.getAttribute("Register");
if (action.equals("del")) {
        String del = request.getParameter("deli");
        int d = (new Integer(del)).intValue();
        buylist.removeElementAt(d);
      }
session.setAttribute("Register", buylist);

Thanks.

Edited by peter_budo because: Keep It Clear - Do wrap your programming code blocks within [code] ... [/code] tags
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  • Latest Post Latest Post by mKorbel
Member Avatar for masijade

Probably doesn't want to create a new one if one already exists. But, in that case it has still been done wrongly, and there is no reason to have to place it back into the session, unless it is null after the get call, in which case it should be created an immediately placed into the session attritube. i.e.

ArrayList<String> bogus = session.getAttribute("bogus");
if (bogus == null) {
  bogus = new ArrayList<String>();
  session.putAttribute("bogus", bogus);
}
// do whatever you want with bogus except redefining it
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