[OpenJDK 2D-Dev] RFR: 8146324: Add sun.font.FontUtilities.isComplexCharCode or related method to public API

[Semyon Sadetsky]

On 3/25/2016 1:43 AM, Andrej Golovnin wrote:
> Hi Phil,
>
>> That is true .. although I think I have previously been convinced that IAE
>> is generally the better choice for such a case, I found only deriveFont
>> that throws IAE for null in this file.
>> So the question is whether to be consistent or to start picking the better option.
>> So if there were no existing IAEs or NPEs in this file, which would you choose now ?
>  From my standpoint of view you should use NPE.
> And maybe java.util.Objects.requireNonNull() may help you to answer this question
> if you rewrite your code to use it instead of doing manual check. :-)

requireNonNull() just checks null value regardless of where is it found. While the question is about about method argument values specifically.
I would be grateful to those who can prove why NPE is preferred to IAE in case if the invalid argument value equals to null.

>
> Best regards,
> Andrej Golovnin