<Swing Dev> Suspicious field assignment in StrikeMetrics

Andrey Turbanov turbanoff at gmail.com
Tue Jan 5 14:23:05 UTC 2021


I don't have a JBS account yet, so I can't create a bug.
I hope someone, who read it can create it.

Andrey Turbanov

вт, 5 янв. 2021 г. в 15:14, Volodin, Vladislav <vladislav.volodin at sap.com>:
>
> Hello Andrey,
>
> Nice catch! You can create a bug and prepare a pull request, so maintainers can review it.
> What I have just personally noticed, all fields have the type float, so probably instead of "Integer.MIN_VALUE", I would recommend to use "-Float.MAX_VALUE". But since this code is about 13-years old, I don't know if reviewers can accept your PR without additional tests.
>
> Kind regards,
> Vlad
>
> -----Original Message-----
> From: swing-dev <swing-dev-retn at openjdk.java.net> On Behalf Of Andrey Turbanov
> Sent: Dienstag, 5. Januar 2021 12:40
> To: swing-dev at openjdk.java.net
> Subject: <Swing Dev> Suspicious field assignment in StrikeMetrics
>
> Hello.
> I've found suspicious code in constructor sun.font.StrikeMetrics#StrikeMetrics()
>
> StrikeMetrics() {
>     ascentX = ascentY = Integer.MAX_VALUE;
>     descentX = descentY = leadingX = leadingY = Integer.MIN_VALUE;
>     baselineX = baselineX = maxAdvanceX = maxAdvanceY = Integer.MIN_VALUE;
> }
>
> As you can see, basLineX field is assigned twice.
> Looks like it's supposed to be like this:
>
> baselineX = baselineY = maxAdvanceX = maxAdvanceY = Integer.MIN_VALUE;
>
>
>
> Found by SpotBugs
> https://spotbugs.readthedocs.io/en/stable/bugDescriptions.html#sa-double-assignment-of-field-sa-field-double-assignment
>
> Andrey Turbanov


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