When will they put the swing class?

Answer 1

I know. But it would be interesting

Answer 2

It would be hard work for the platform

Answer 3

I don't think swing is supported in android.
So, never.

Answer 4

Java Swing cannot run in the playground. Swing is also deprecated. It still works, but you should look into using JavaFX instead.

http://www.oracle.com/technetwork/java/javafx/overview/faq-1446554.html

http://docs.oracle.com/javase/8/javase-clienttechnologies.htm