RFR: 8368729: Add appropriate checks in java.awt.image.Kernel constructor

[Jayathirth D V]

On Thu, 6 Nov 2025 18:33:26 GMT, Sergey Bylokhov <serb at openjdk.org> wrote:

>> Spec of NPE states multiple reasons of when an NPE is thrown while using null object and IAE clearly mentions that we are trying to validate input arguments and throw it when we see any issue.
>> 
>> Current spec already throws IAE in one of the validation scenario, so throwing the same IAE for other input argument validation is uniform.
>> 
>> We can say that in some parts of JDK we throw NPE for null argument verification, but using IAE in this scenario looks better.
>
>>Current spec already throws IAE in one of the validation scenario, so throwing the same IAE for other input argument validation is uniform.
> 
> We usually throw an NPE when the value is null, since you can’t validate any properties on a null reference, and it’s more specific than an IAE. Moreover, NPE was thrown before, so this won’t change the behavior.

NPE which was thrown before was undefined behaviour.
There is no objection in CSR request also. I would like to continue keeping usage of IAE.

If majority of reviewers have objections, we can take it up in follow-up issue.

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PR Review Comment: https://git.openjdk.org/jdk/pull/28127#discussion_r2502405775