This release enables Java graphical applications, whether based on JavaFX, Swing, or Abstract Window Toolkit (AWT), to use either the GTK+ version 2 or version 3 on Linux or Solaris.
By default, the JDK on Linux or Solaris uses GTK+ 2 if available; if not, it uses GTK+ 3.
To use a specific version of GTK+, set the system property `jdk.gtk.version`. This system property may have a value of 2 or 3. You must set this property before your application loads GTK+, and it must not conflict with a GTK+ version that may have been loaded earlier by another toolkit.
To get more information about the GTK+ version loaded and GTK+ specific issues, set the system property `jdk.gtk.verbose` equal to true.