src/share/classes/java/util/function/LongUnaryOperator.java

@@ -1,7 +1,7 @@
 /*
- * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2012, 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

@@ -27,10 +27,11 @@
 /**
  * An operation on a single {@code long} operand yielding a {@code long} result.
  *
  * @since 1.8
  */
+@FunctionalInterface
 public interface LongUnaryOperator {
 
     /**
      * Returns the {@code long} result of the operation upon the {@code long}
      * operand.