<Swing Dev> RFR: 8272756: Remove unnecessary explicit initialization of volatile variables in java.desktop

[Alexey Ivanov]

On Mon, 23 Aug 2021 06:35:34 GMT, Сергей Цыпанов <github.com+10835776+stsypanov at openjdk.org> wrote:

>> src/java.desktop/share/classes/com/sun/imageio/plugins/tiff/TIFFIFD.java line 64:
>> 
>>> 62:         Set<Integer> tags = essentialTags;
>>> 63:         if (tags == null) {
>>> 64:             essentialTags = Set.of(
>> 
>> What is the purpose of the local tags here?
>
> Looks like there's no purpose, `tags` is not used after assignment

Maybe it's kind of a protection from a race. Yet it's possible either way: another thread could see `essentialTags == null` before this one initialises the field.

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PR: https://git.openjdk.java.net/jdk/pull/5197