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  1. JDK
  2. JDK-8247753

UIManager.getSytemLookAndFeelClassName() returns wrong value on Fedora 32

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    • b12
    • linux

        Java relies on an environment variable GNOME_DESKTOP_SESSION_ID for getting GTK desktop theme. This environmental variable was deprecated earlier and now this got removed in the latest version via: https://gitlab.gnome.org/GNOME/gnome-session/commit/00e0e6226371d53f651cc881e74c0543192c94a8#5b3005b925ed5c2612a9604ad3c756b1f9472165So,

        with the removal of this GNOME_DESKTOP_SESSION_ID variable, how should Java, moving forward detect a Gtk-based desktop?

        For Example:
        System.out.println(UIManager.getSystemLookAndFeelClassName());
        - On Fedora 32, it returns: (ACTUAL): javax.swing.plaf.metal.MetalLookAndFeel
        - On Fedora 27, it returns: (EXPECTED): com.sun.java.swing.plaf.gtk.GTKLookAndFeel

        This issue is discussed in details here: https://github.com/AdoptOpenJDK/openjdk-support/issues/94

        Note: As per the latest updates received from GNOME, using the above environmental variable is a bug. And the recommendation is that Java GUI apps running on Linux (and probably all Unix platforms) should use whichever "look and feel" is considered to be high-quality and doesn't look hugely out-of-place.

              pbansal Pankaj Bansal (Inactive)
              vtewari Vyom Tewari
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                Created:
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