Hi Thomas,
you wrote:
(1) String firstVisit = (String) session.getAttribute("firstVisit");
| (2) if (firstVisit.equals("")) {
| (3) ...
| (4) }
If a user is visitting your page the first time, firstVisit is null after the first
line. So you're trying to check if null is equal to "" in line 2. This results in a
NullPointerException.
Thomas
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