RFR: 8373668: Add override keyword to *Klass classes

Mon Dec 15 10:14:07 UTC 2025

Using override provides better visibility and compiler support for suspicious virtual methods. It makes it clears when reading a class header file if a new virtual interface is introduced or if it simply overridden.

Testing
 * GHA
 * Running tier1 on Oracle supported platforms

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Commit messages:
 - Add override keyword to *Klass classes

Changes: https://git.openjdk.org/jdk/pull/28820/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=28820&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8373668
  Stats: 99 lines in 7 files changed: 0 ins; 5 del; 94 mod
  Patch: https://git.openjdk.org/jdk/pull/28820.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/28820/head:pull/28820

PR: https://git.openjdk.org/jdk/pull/28820