Question

The link http://download.oracle.com/javase/6/docs/api/java/util/concurrent/package-summary.html describes several interesting data structures like concurrent skip-list. Is there any known reliable open source representation of these?

Answer 1

You can have a look at the EDU.oswego.cs.dl.util.concurrent package upon which those classes are based (although this library is in maintenance mode only now).

Of course, you can also have a look at the OpenJDK source for a more recent version.