RFR: 8341372: BackgroundPosition, BorderImage, BorderStroke, CornerRadii should be final

[Andy Goryachev]

On Tue, 1 Oct 2024 21:46:21 GMT, Michael Strauß <mstrauss at openjdk.org> wrote:

> Backgrounds and borders are comprised of immutable and final types. The following types are marked with the `final` modifier:
> 
> * Background
> * BackgroundFill
> * BackgroundImage
> * BackgroundSize
> * Border
> * BorderWidths
> 
> The following types are not marked with the `final` modifier:
> 
> * BackgroundPosition
> * BorderImage
> * BorderStroke
> * CornerRadii
> 
> This is probably just an oversight, as there is no value in allowing a subsection of these types to be extended.

There might be a very narrow use case (like debugging) when developer might need to extend to supply a custom `toString()` or some other method.

>From a high level design standpoint, I do agree with making these classes final.

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PR Comment: https://git.openjdk.org/jfx/pull/1587#issuecomment-2387197329