The Hashtable `javax.swing.text.html.HTML.scMapping` is modified only within `<clinit>` block. We can replace it with immutable map to avoid Hashtable synchronization overhead.
------------- Commit messages: - 8347370 update copyright year - [PATCH] Unnecessary Hashtable usage in javax.swing.text.html.HTML.scMapping Changes: https://git.openjdk.org/jdk/pull/21842/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=21842&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8347370 Stats: 20 lines in 1 file changed: 10 ins; 8 del; 2 mod Patch: https://git.openjdk.org/jdk/pull/21842.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/21842/head:pull/21842 PR: https://git.openjdk.org/jdk/pull/21842
