[jdk17] RFR: 8269409: Post JEP 411 refactoring: core-libs with maximum covering > 10K

[Weijun Wang]

More refactoring to limit the scope of `@SuppressWarnings` annotations.

Sometimes I introduce new methods. Please feel free to suggest method names you like to use.

-------------

Commit messages:
 - 8269409: Post JEP 411 refactoring: core-libs with maximum covering > 10K

Changes: https://git.openjdk.java.net/jdk17/pull/152/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk17&pr=152&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8269409
  Stats: 289 lines in 21 files changed: 161 ins; 64 del; 64 mod
  Patch: https://git.openjdk.java.net/jdk17/pull/152.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk17 pull/152/head:pull/152

PR: https://git.openjdk.java.net/jdk17/pull/152