RFR: 8301991: Convert l10n properties resource bundles to UTF-8 native

[Jonathan Gibbons]

On Thu, 23 Feb 2023 09:04:23 GMT, Justin Lu <jlu at openjdk.org> wrote:

> This PR converts Unicode sequences to UTF-8 native in .properties file. (Excluding the Unicode space and tab sequence). The conversion was done using native2ascii.
> 
> In addition, the build logic is adjusted to support reading in the .properties files as UTF-8 during the conversion from .properties file to .java ListResourceBundle file.

make/langtools/tools/compileproperties/CompileProperties.java line 252:

> 250:             try {
> 251:                 writer = new BufferedWriter(
> 252:                         new OutputStreamWriter(new FileOutputStream(outputPath), StandardCharsets.ISO_8859_1));

Using ISO_8859_1 seems strange.
Since these are generated files, you could write them as UTF-8 and then override the default javac option for ascii when compiling _just_ these files.

Or else just stay with ascii; no one should be looking at these files!

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PR: https://git.openjdk.org/jdk/pull/12726