I filed a bug report a while back. Since I didn't have access I could not comment or update in that issue.
https://bugs.openjdk.java.net/browse/JDK-8179073 With Java 9, a JavaFX dialogs got tiny and did not size up to its content. This worked fine when I was running JDK 9 build 161, but after JDK 9 build 165 the dialog window did not size up to show any of its content. The code exampled I provided with that bug report still produces a tiny dialog window with both jdk-9.0.4 and jdk-10.0.1 Setting the Dialog size to fixed width/height does not work, but if with setResizable(true) the Dialog gets its full size. It has been a while since I have used Java 9. Today I got the same problem while trying to exit SceneBuilder 9 downloaded from Gluon. I was wondering if I should re-create this bug report on the GitHub OpenJFX repository?