A few classes in `sun.util` package have non-final fields which could easily be marked `final`.
------------- Commit messages: - [PATCH] Make fields final in 'sun.util' package Changes: https://git.openjdk.org/jdk/pull/15736/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=15736&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8316557 Stats: 42 lines in 10 files changed: 2 ins; 13 del; 27 mod Patch: https://git.openjdk.org/jdk/pull/15736.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/15736/head:pull/15736 PR: https://git.openjdk.org/jdk/pull/15736
