On AIX, lib/fontconfig.bfc file is used to find font setting. I ran SwingSet2 List demo program with AIX C locale. JDK21's line spacing is larger then JDK17. Screen shots are in [JDK-8307953](https://bugs.openjdk.org/browse/JDK-8307953). When I used `-Dfile.encoding=COMPAT` option on AIX C locale, SwingSet2 worked fine as expected.
This situation happens `Charset.defaultCharset()` always returns UTF-8 after JEP 400 by default. `native.encoding` system property has platform's encoding/charset name. If platform's charset name is not supported by Java, charset name should be `UTF-8`. Additionally, following parts are changed: `src/java.desktop/aix/data/fontconfig/fontconfig.propertie`s has invalid charset name. For Java for AIX: - Encoding name for AIX's Zh_TW locale is `big5`, charset name should be `x-IBM950` instead of `big5`. - Encoding name for AIX's zh_CN locale is `IBM-eucCN`, charset name should be `x-IBM1383` instead of `x-EUCCN`. In my understanding, this fix affects just for AIX platform. Note: macos-x64 tier1 test was failed, but I think it's not related this PR. ------------- Commit messages: - 8307953: [AIX] C locale's font setting was changed by JEP 400 Changes: https://git.openjdk.org/jdk/pull/13937/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=13937&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8307953 Stats: 7 lines in 2 files changed: 3 ins; 0 del; 4 mod Patch: https://git.openjdk.org/jdk/pull/13937.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/13937/head:pull/13937 PR: https://git.openjdk.org/jdk/pull/13937
