I heard that apparently Swing is being developed no longer. I like Swing and use it all the time.
What should I now be using instead?
You probably read something about the 'Swing Application Framework', which while built using Swing, is not 'Swing'.
From Swing Application Framework - Status and Roadmap.
Development on an open source Reference Implementation called appframework was begun in 2006.[1] It was originally expected that this implementation would be the means for integrating JSR 296 into the upcoming Java SE 7 (Dolphin) version of the Java programming language, and the project was scheduled to be included in milestone 5 of the JDK7 development. However, in August 2009, it was announced that the project would not be included due to an inability to reconcile design flaws and achieve consensus among the JSR 296 team before the milestone 5 deadline.[2]
The original Swing Application Framework implementation has been put on hold indefinitely.[3] The last public release of the appframework project is version 1.03.[1]