On 07/03/2018 10:21, semyon.sadet...@oracle.com wrote:
That's not ok, since we change a behavior without discussion that the benefits of change outweigh the disadvantages, when we implemented some unrelated fix.
That's not true. You may find the discussion in the current thread. Fill free to provide your arguments to it.

I found nothing related to the behavior, only some conclusion about possible performance difference.

It is an improvement. NPE is not expected result according to the toDisplayString() method spec.

It also changed result of toDisplayString(), previously it did not returned null. I think .01 is better and simpler.

Returning null is better than throwing NPE especially in the case when NPE doesn't correspond to the spec. Krishna kindly agreed to fix both issues at once. I didn't get what is the problem?

Nope, if the method start to return null means that all its usage should be checked for null return value. As I said it is better to use version .01 which fixed the problem w/o side effects.

Best regards, Sergey.

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