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 * Represents a function that accepts two arguments and produces a long-valued 29 * result. This is the {@code long}-producing primitive specialization for 30 * {@link BiFunction}. 31 * 32 * <p>This is a <a href="package-summary.html">functional interface</a> 33 * whose functional method is {@link #applyAsLong(Object, Object)}. 34 * 35 * @param <T> the type of the first argument to the function 36 * @param <U> the type of the second argument to the function 37 * 38 * @see BiFunction 39 * @since 1.8 40 */ 41 @FunctionalInterface 42 public interface ToLongBiFunction<T, U> { 43 44 /** 45 * Applies this function to the given arguments. 46 * 47 * @param t the first function argument 48 * @param u the second function argument 49 * @return the function result 50 */ applyAsLong(T t, U u)51 long applyAsLong(T t, U u); 52 } 53