RFR: 8373288: EnumMap spliterators should include more specific characteristics

Tue Dec 16 04:50:25 UTC 2025

The spliterators returned by keySet, entrySet, and values were not reporting additional characteristics, such as ORDERED, SORTED, and NONNULL; the EnumMap iterators all guarantee iteration is in the natural order of the enum key, and nulls are disallowed as keys.

Null values are allowed, so the values collection can only additionally report ORDERED.

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Commit messages:
 - Update copyright year
 - 8373288: EnumMap spliterators should include more specific characteristics

Changes: https://git.openjdk.org/jdk/pull/28840/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=28840&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8373288
  Stats: 140 lines in 2 files changed: 138 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/28840.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/28840/head:pull/28840

PR: https://git.openjdk.org/jdk/pull/28840