The private field `mask` is never used in `JFormattedTextField`. I couldn't find any usages of the field, including JNI. Therefore, it is safe to remove.
------------- Commit messages: - 8313403: Remove unused 'mask' field from JFormattedTextField Changes: https://git.openjdk.org/jdk/pull/15088/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=15088&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8313403 Stats: 4 lines in 1 file changed: 0 ins; 4 del; 0 mod Patch: https://git.openjdk.org/jdk/pull/15088.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/15088/head:pull/15088 PR: https://git.openjdk.org/jdk/pull/15088
