Java Swing is old (JavaFX is now the latest GUI technology) but its not forgotton.
OpenJFX is an open source, next generation client application platform for desktop, mobile and embedded systems based on JavaSE. It is a collaborative effort by many individuals and companies with the goal of producing a modern, efficient, and fully featured toolkit for developing rich client applications. This is the open source project where we develop JavaFX.
Modules being visualised
List of repository modules/files being visualised in the above diagram: