Ugly UI when GTK+ Look and Feel is active


Java 11+ uses Gnome 3 Libraries by default for rendering. Causing ugly UI rendering on GTK+ Look and Feel.

Solution:

  1. Use FlatLAF (which is enabled by default) or
  2. add -J-Djdk.gtk.version=2.2 to your command line or to your (netbeans.cfg) if you want to use the GTK LAF
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