I have a related question. I tried arch's openjdk packages and those were successful in displaying Swing UIs. Then, to check out newer JDKs and IBM's OpenJ9, I grabbed a build from https://adoptopenjdk.net, and I just couldn't get any Swing UI to display. It reported many exceptions and that was it. Tried with different window managers and compositors. Any idea what's different on Arch or where the adoptopenjdk builds work?
