&gt;The language itself not much. It doesn&#x27;t offer anything new that Java 1.0 with Quasar doesn&#x27;t already have.<p>It offers lots of abstractions Java didn&#x27;t&#x2F;doesn&#x27;t:
Lots of concurrency features, Ad hoc interfaces, Closures, Stack resizing, Type switches, Multiple returned values, Slices.