There is a field `javax.swing.text.html.CSS#styleConstantToCssMap` which uses legacy `Hashtable` class. As this map is read-only and all its content is initialized in `<clinit>` we can safely use immutable `Map` instead.
------------- Commit messages: - [PATCH] Unnecessary Hashtable usage in CSS.styleConstantToCssMap Changes: https://git.openjdk.org/jdk/pull/23149/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=23149&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8348170 Stats: 36 lines in 1 file changed: 2 ins; 0 del; 34 mod Patch: https://git.openjdk.org/jdk/pull/23149.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/23149/head:pull/23149 PR: https://git.openjdk.org/jdk/pull/23149
