There is a field 'sun.awt.X11.XKeysym#javaKeycode2KeysymHash' 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 XKeysym.javaKeycode2KeysymHash Changes: https://git.openjdk.org/jdk/pull/23347/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=23347&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8349157 Stats: 20 lines in 1 file changed: 7 ins; 9 del; 4 mod Patch: https://git.openjdk.org/jdk/pull/23347.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/23347/head:pull/23347 PR: https://git.openjdk.org/jdk/pull/23347
