RFR: 8338153: java/awt/Checkbox/CheckboxCheckerScalingTest.java test failed on linux machine [v4]

[Abhishek Kumar]

On Thu, 5 Sep 2024 04:48:36 GMT, Tejesh R <tr at openjdk.org> wrote:

>> Test failed intermittently on particular host. Though analysis pointed out to a test frame at left top on that host, I've updated the test for further stabilizing it. Two things done here:
>> 1. Move the frame to center of the screen rather than left top.
>> 2. Added tolerance checks for color comparison - this is based on analysis reports where the image didn't had exact black color which is supposed to be. So like other test cases, providing some tolerance for comparison.
>
> Tejesh R has updated the pull request incrementally with one additional commit since the last revision:
> 
>   reduce tolerance value

`private static BufferedImage imageAfterChecked;` can be move inside main method.

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PR Review: https://git.openjdk.org/jdk/pull/20723#pullrequestreview-2282379098