Java also has one as part of the 6 concurrency additions: http://java.sun.com/javase/6/docs/api/java/util/concurrent/ConcurrentSkipListMap.html http://java.sun

Java also has one as part of the 6 concurrency additions: http://java.sun.com/javase/6/docs/api/java/util/concurrent/ConcurrentSkipListMap.html http://java.sun.com/javase/6/docs/api/java/util/concurrent/C... There's a ConcurrentSkipListSet too.