Modern Java is still very definitely OOP and not multi-paradigm. Other JVM languages, like Scala or Kotlin, add more multi-paradigm features to that ecosystem, but modern Java doesn't.
I was pretty surprised and impressed to see a modern example lately. There’s Record data types, stronger type inference with `var`, pretty great structural pattern matching, switch expressions (that return a value), stream apis for map, filter, and reduce etc. All of these move it further away from strictly OOP.
And separate but still cool is a pretty neat virtual thread system too. Java has definitely had a bit of a glow up since I learned it in uni.
And you can’t subtype those.
Other JVM languages, like scala, are more OO than Java.