JInternalFrame's bottom area is not properly drawn with Aqua LAF. This problem remained for long time, but we recognized it recently.
According to the bug report, it depends on MacOS's version. I don't have old ones (10.10 and 10.11 in the report), but the current MacOS can recreate the issue. I confirmed the following OS versions recreated this issue and this patch could solve it. Mojave 10.14.6 Catalina 10.15.7 Big Sur 11.6.2 Monterey 12.1 jtreg "javax/swing" and "java/awt" have no regression. ------------- Commit messages: - 8139173: [macosx] JInternalFrame shadow is not properly drawn Changes: https://git.openjdk.java.net/jdk/pull/7228/files Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=7228&range=00 Issue: https://bugs.openjdk.java.net/browse/JDK-8139173 Stats: 141 lines in 2 files changed: 138 ins; 2 del; 1 mod Patch: https://git.openjdk.java.net/jdk/pull/7228.diff Fetch: git fetch https://git.openjdk.java.net/jdk pull/7228/head:pull/7228 PR: https://git.openjdk.java.net/jdk/pull/7228
