[weavejester]

That's still far from a general solution.

Let's consider an example. One of the classic concurrency problems is managing a bank transfer. In this problem it's important that the debit and credit operations happen atomically. If one operation fails, then both operations should fail.

In Clojure, we'd write:

    (defn transfer [from to amount]
      (dosync
        (alter from - amount)
        (alter to + amount)))

How would you write the same thing in Java?

A lot of the problems with dealing with concurrency are in communication between threads. BlockingQueues and Executors only deal with a small subset of concurrency problems, and blocked threads are a fairly inefficient use of resources compared to async solutions.