RFR: 8302472 WebColorFieldSkin should use precompiled Pattern

[Michael Strauß]

On Tue, 14 Feb 2023 16:12:29 GMT, John Hendrikx <jhendrikx at openjdk.org> wrote:

> Split off from https://github.com/openjdk/jfx/pull/837
> 
> This uses a precompiled regex pattern and cleans up the code in WebColorFieldSkin a bit.

modules/javafx.controls/src/main/java/com/sun/javafx/scene/control/skin/WebColorFieldSkin.java line 42:

> 40:     private static final String HEX_DIGIT = "[A-Fa-f0-9]";
> 41:     private static final Pattern PATTERN = Pattern.compile("#?" + HEX_DIGIT + "{6}");
> 42:     private static final Pattern PARTIAL_PATTERN = Pattern.compile("#?" + HEX_DIGIT + "{0,6}");

You might also use the character class `\p{XDigit}`, which matches a hexadecimal character.

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PR: https://git.openjdk.org/jfx/pull/1032