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kotlinlang

I would like to build a JavaFX to build a UI for an existing Kotlin project. I would love to use TornadoFX but I am a bit nervous as TornadoFX has still uses Java 8 runtime and not had an update for a while. The rest of my project (25,000+ lines) has been using the current Java runtime releases and is in production. At the moment I am leaning towards using JavaFX directly. Before I give up, is there a way to use TornadoFX with later versions? Thanks for your help!

I have made it work on 11, but there were some workarounds required.