Re:Doug Lea's concurrent Java (Score 1)

You're missing some significant improvements in the implementation, which have been completely rewritten, to take advantage of improvements in the Java Memory Model and the exposure of CAS-like primitives in the JVM for 5.0. As a result, most of the classes in j.u.c use wait-free, lock-free algorithms instead of lock-based ones, offering better performance and scalability than u.c. There's a lot more there than simply a cleaned-up, generified u.c (although its u.c heritage shows through clearly.)