The JDK's `java.desktop` module has internal code that interoperates with multiple versions of the GTK platform library. This is primarily to support the Swing GTK LookAndFeel.

The JDK previously included support for interoperating with the GTK 2 version of the library, which is reaching the end of its life.
GTK 3 long ago superseded it and is supported by the JDK as the preferred default. To use GTK 2, apps must request it using the `jdk.gtk.version` System property. And since many recent Linux distributions make GTK 2 only an optional install, it may require extra work to use it. Future Linux distributions will likely not provide any way to install it.

Since all versions of Linux to be supported by JDK 24 provide GTK3, GTK2 support in JDK is now removed.

Setting the `jdk.gtk.version` System property to `2` or `2.2` will no longer have any effect. GTK 3 will be loaded.