RFR: JDK-8292276 : Missing color names in CSS. [v2]

[ScientificWare]

On Mon, 15 Aug 2022 19:39:14 GMT, ExE Boss <duke at openjdk.org> wrote:

>> ScientificWare has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Adds to CSS.java the missing color names.
>>   
>>   Adds to CSS.java, the missing color names defined by :
>>   CSS Color Module Level 4
>>   W3C Candidate Recommendation Snapshot, 5 July 2022
>>   [7.1 Named Colors](https://www.w3.org/TR/css-color-4/#named-color)
>>   - Updates, Copyright year.
>>   - Adds relative imports.
>>   - Replaces, if ... then ... else statements with TreeMap called "colorNamed".
>>     Code is more readable and easy to maintain.
>>     After tests, HashMap seems slower than TreeMap. Results are available at https://github.com/scientificware/jdk/issues/12#issuecomment-1213978168.
>>   
>>   Warning : The Previous JDK CSS Orange Color is different from CSS Color Recommendation.
>
> src/java.desktop/share/classes/javax/swing/text/html/CSS.java line 1414:
> 
>> 1412:     }
>> 1413: 
>> 1414:     private static TreeMap<String, Color> colorNamed = new TreeMap<String, Color>(
> 
> Why a `TreeMap` instead of just using `Map.ofEntries(…)`?
> 
> --------------------------------------------------------------------------------
> 
> The latter is unmodifiable and its `table` is marked as `@Stable`[^1], which means that the JIT is allowed to treat it as fully constant[^2].
> 
> [^1]: https://github.com/openjdk/jdk/blob/ea2c82e74f5580f396920f9e561cbec80c03f373/src/java.base/share/classes/java/util/ImmutableCollections.java#L1164-L1170
> [^2]: https://github.com/openjdk/jdk/blob/ea2c82e74f5580f396920f9e561cbec80c03f373/src/java.base/share/classes/jdk/internal/vm/annotation/Stable.java#L64-L72

@ExE-Boss I choosed a TreeMap because it seems it implements the best algorithm to acces algorithm to the values log(n) time.
By maintaining the order of its elements, it's can use compare to accelerate time access.

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PR: https://git.openjdk.org/jdk/pull/9825