Java tutorial
/* * 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 * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package java.util.function; /** * Represents a function that accepts two arguments and produces a double-valued * result. This is the {@code double}-producing primitive specialization for * {@link BiFunction}. * * <p>This is a <a href="package-summary.html">functional interface</a> * whose functional method is {@link #applyAsDouble(Object, Object)}. * * @param <T> the type of the first argument to the function * @param <U> the type of the second argument to the function * * @see BiFunction * @since 1.8 */ @FunctionalInterface public interface ToDoubleBiFunction<T, U> { /** * Applies this function to the given arguments. * * @param t the first function argument * @param u the second function argument * @return the function result */ double applyAsDouble(T t, U u); }