--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/EDU/oswego/cs/dl/util/concurrent/Callable.java	Sat Mar 21 11:00:06 2009 +0000
@@ -0,0 +1,35 @@
+
+/*
+  File: Callable.java
+
+  Originally written by Doug Lea and released into the public domain.
+  This may be used for any purposes whatsoever without acknowledgment.
+  Thanks for the assistance and support of Sun Microsystems Labs,
+  and everyone contributing, testing, and using this code.
+
+  History:
+  Date       Who                What
+  30Jun1998  dl               Create public version
+   5Jan1999  dl               Change Exception to Throwable in call signature
+  27Jan1999  dl               Undo last change
+*/
+
+package EDU.oswego.cs.dl.util.concurrent;
+
+/**
+ * Interface for runnable actions that bear results and/or throw Exceptions.
+ * This interface is designed to provide a common protocol for
+ * result-bearing actions that can be run independently in threads, 
+ * in which case
+ * they are ordinarily used as the bases of Runnables that set
+ * FutureResults
+ * <p>
+ * <p>[<a href="http://gee.cs.oswego.edu/dl/classes/EDU/oswego/cs/dl/util/concurrent/intro.html"> Introduction to this package. </a>]
+ * @see FutureResult
+ **/
+
+public interface Callable {
+  /** Perform some action that returns a result or throws an exception **/
+  Object call() throws Exception;
+}
+