Programming in Scala can be run on the JVM. From scala-lang.org: "Scala is a general purpose programming language designed to express common programming patterns in a concise, elegant, and type-safe way. It smoothly integrates features of object-oriented and functional languages. It is also fully interoperable with Java."
Scala Links:
Sample Hello World:
object HelloWorld {
def main(args: Array[String]) =
Console.println("Hello, world!")
}