As of Java 20, some classes have been deprecated. We should stop using or auto importing those before they are removed. To get a report of this and other deprecated apis, install Java 20 (or latest) and run:

Example deprecated class issues in 1.12.0-alpha3:

As existing Clojure code may be relying on these imported classes, we should consider our options to gracefully degrade here. This does not become crucial until the classes are actually removed at some future point.