Enabling customization of localized format patterns for the `java.time` date/time formatters through the locale-sensitive SPI. While existing SPIs allow customization of textual elements, such as month-of-year names, formatting patterns (e.g., "dd/MM/yyyy") cannot currently be customized for a given locale.
This enhancement is needed to support customers migrating from the now-removed COMPAT locale resources to CLDR-based ones. --------- - [x] I confirm that I make this contribution in accordance with the [OpenJDK Interim AI Policy](https://openjdk.org/legal/ai). ------------- Commit messages: - initial commit Changes: https://git.openjdk.org/jdk/pull/30979/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=30979&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8379973 Stats: 729 lines in 16 files changed: 468 ins; 188 del; 73 mod Patch: https://git.openjdk.org/jdk/pull/30979.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/30979/head:pull/30979 PR: https://git.openjdk.org/jdk/pull/30979
