1 /*
   2  * Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 package java.util.function;
  26 
  27 /**
  28  * An operation which accepts two input arguments and returns no result. This is
  29  * the two-arity specialization of {@link Consumer}. Unlike most other
  30  * functional interfaces, {@code BiConsumer} is expected to operate via
  31  * side-effects.
  32  *
  33  * @param <T> the type of the first argument to the {@code accept} operation.
  34  * @param <U> the type of the second argument to the {@code accept} operation.
  35  *
  36  * @see Consumer
  37  * @since 1.8
  38  */
  39 @FunctionalInterface
  40 public interface BiConsumer<T, U> {
  41 
  42     /**
  43      * Performs operations upon the provided objects which may modify those
  44      * objects and/or external state.
  45      *
  46      * @param t an input object
  47      * @param u an input object
  48      */
  49     void accept(T t, U u);
  50 }