response.setHeader(keys[i].toString(),value);
in a servlet is throwing null pointer exception even though none of keys[i] or value are null why is it so?
views:
59answers:
1
+6
A:
One of the following is true:
- response is null
- keys is null
- keys[i] is null
- the exception is not thrown from the line you posted.
A 29% acceptance rate isn't likely to attract much help.
duffymo
2010-04-01 17:23:51
About #4, error messages sometimes appear to be from the line after the actual problem; could anything there be null?
Lord Torgamus
2010-04-01 17:28:18
Well now that you added that line about the acceptance rate, you should change the post to "TWO of the following are true."
Lord Torgamus
2010-04-01 17:32:28
True enough, Lord Torgamus. 8)
duffymo
2010-04-01 17:50:59
Actually, I think there is one more case: i is of type Integer ('int' wrapper class) and i is null. I believe the auto-"unboxing" code will result in a NullPointerException.
Bert F
2010-04-01 19:09:56