Holy hell Java on a Smartwatch?
WearOS is based on Android, which uses Android Runtime (ART) as the application runtime. ART uses Java (or any other JVM-compatible language, such as Kotlin) as the development language, but compiles the app to native code when it’s installed on a client device.
So… Kind of?
Definitely ancient since C# has been cross-platform for 4 years with Dotnet Core. If you include Mono, make that 19 years.