title: Actual implementation of Callable and Future
body: <p>I am in the process of understanding fine grain util.concurrency.  Where is implementation of the Java <code>Callable</code> and <code>Future</code> located in the JVM ? </p>
  
  <p>I have found the <a href="http://grepcode.com/file/repository.grepcode.com/java/root/jdk/openjdk/6-b14/java/util/concurrent/Future.java">Future class</a> where it describes the future on the high level in Java lang, I am trying to find where it is described on the lower level.</p>
  
  <p>To sum up it would be interesting to find the actual implementation of Future and Callable e.g: the part of the JVM that handles the Future.get() or Callable.call() and prescribes them how they should work.</p>
  
  <p>Looking forward for your replies,
  Akonkagva</p>