<i18n dev> RFR: 8289834: Add SBCS and DBCS Only EBCDIC charsets

[Naoto Sato]

On Wed, 6 Jul 2022 14:05:39 GMT, Ichiroh Takiguchi <itakiguchi at openjdk.org> wrote:

> OpenJDK supports "Japanese EBCDIC - Katakana" and "Korean EBCDIC" SBCS and DBCS Only charsets.
> |Charset|Mix|SBCS|DBCS|
> | -- | -- | -- | -- |
> | Japanese EBCDIC - Katakana | Cp930 | Cp290 | Cp300 |
> | Korean | Cp933 | Cp833 | Cp834 |
> 
> But OpenJDK does not supports some of "Japanese EBCDIC - English" / "Simplified Chinese EBCDIC" / "Traditional Chinese EBCDIC" SBCS and DBCS Only charsets.
> 
> I'd like to request Cp1027/Cp835/Cp836/Cp837 for consistency
> |Charset|Mix|SBCS|DBCS|
> | ------------- | ------------- | ------------- | ------------- |
> | Japanese EBCDIC - English | Cp939 | **Cp1027** | Cp300 |
> | Simplified Chinese EBCDIC | Cp935 | **Cp836** | **Cp837** |
> | Traditional Chinese EBCDIC | Cp937 | (*1) | **Cp835** | 
> 
> *1: Cp037 compatible

I second Alan's comment here. I am not sure we could justify those legacy less common EBCDIC charsets making into the `jdk.charsets` module. Instead, utilizing the charset provider mechanism will better fit here to me.

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PR: https://git.openjdk.org/jdk/pull/9399