[klibertp]

Clojure has some very nifty features for interacting with class libraries. It has a number of macros for easy access to methods and static methods, for calling a series of methods on an object and so on. There's also `proxy` macro which let's you create a subclass of any class you want, conforming to any number of interfaces, but providing sane defaults for methods you don't need or want to implement. There's also reify, which let's you easily create classes which implement some interfaces without any overhead. There are some features which correspond to interfaces, but are somewhat more flexible (defprotocol, extend-type, reify) and then you get multiple dispatch and more.

In short I found Clojure and ClojureScript to be very easy to fit into any OO framework. It's sometimes hard to convince yourself to use those features, because you know that idiomatic Clojure solution would be better, but other than that I saw no problems at all.

But I'm not a heavy Clojure user, so it could be that I somehow lucked out and not encountered any problems which more experienced users face sometimes.