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

@@ -30,10 +30,11 @@
  *
  * @param <T> the type of input objects to the function
  *
  * @since 1.8
  */
+@FunctionalInterface
 public interface LongFunction<T> {
 
     /**
      * Apply a function to the input object yielding an appropriate {@code long}
      * value.