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

The top voted answer suggest to directly use the clojure collections which I think is a very good idea. Unfortunately the fact that clojure is a dynamically typed language and Java is not makes the clojure libraries very uncomfortable to use in Java.

Because of this and the lack of light-weight, easy-to-use wrappers for the clojure collections types I have written my own library of Java wrappers using generics for the clojure collection types with a focus on ease of use and clarity when it comes to interfaces.

https://github.com/cornim/ClojureCollections

Maybe this will be of use to somebody.

P.S.: At the moment only PersistentVector, PersistentMap and PersistentList have been implemented.