Java 8 RFR 8024331: j.u.Map.computeIfPresent() default/nondefault implementations don't throw NPE if the remappingFunction is null and the key is absent

Mike Duigou mike.duigou at
Tue Sep 17 21:33:44 UTC 2013

The Map/ changes only test HashMap. It should probably be extended to test most/all of the other implementations.

I have some worry that the superfluous assignment of the Objects.requireNonNull() result might have a non-negligible cost. 


On Sep 17 2013, at 13:49 , Brian Burkhalter wrote:

> Please review this proposed patch at your convenience.
> Summary:	Explicitly check for null remappingFunction parameter (and clean up similar code for consistency).
> Issue:
> Webrev:
> Thanks,
> Brian

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