RFR: 8342098: Write a test to compare the images [v3]

[Naveen Narayanan]

On Mon, 21 Oct 2024 15:37:57 GMT, Abhishek Kumar <abhiscxk at openjdk.org> wrote:

>> Yet, you'll be unable to print values unless you use `getRGB` again.
>
> Yeah, if it is required to print values then good to save them.

Saved them for printing.

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PR Review Comment: https://git.openjdk.org/jdk/pull/21524#discussion_r1809158759