src/share/classes/java/lang/Runnable.java

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@@ -1,7 +1,7 @@
 /*
- * Copyright (c) 1994, 2005, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1994, 2013, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.  Oracle designates this

@@ -50,12 +50,12 @@
  * @author  Arthur van Hoff
  * @see     java.lang.Thread
  * @see     java.util.concurrent.Callable
  * @since   JDK1.0
  */
-public
-interface Runnable {
+@FunctionalInterface
+public interface Runnable {
     /**
      * When an object implementing interface <code>Runnable</code> is used
      * to create a thread, starting the thread causes the object's
      * <code>run</code> method to be called in that separately executing
      * thread.