what's a good persistent collections framework for use in java?

Question

By persistent collections I mean collections like those in clojure.

For example, I have a list with the elements (a,b,c). With a normal list, if I add d, my original

Answer 1

https://github.com/arnohaase/a-foundation is another port of Scala's libraries.

It is also available from Maven Central: com.ajjpj.a-foundation:a-foundation