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

*** 1,7 ****
  /*
!  * Copyright (c) 2012, 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
--- 1,7 ----
  /*
!  * 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
*** 30,39 ****
--- 30,40 ----
   *
   * @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.