001/*
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements.  See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License.  You may obtain a copy of the License at
008 *
009 *      http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017package org.apache.commons.collections4;
018
019/**
020 * Defines a simple key value pair.
021 * <p>
022 * A Map Entry has considerable additional semantics over and above a simple
023 * key-value pair. This interface defines the minimum key value, with just the
024 * two get methods.
025 *
026 * @param <K> the type of the key
027 * @param <V> the type of the value
028 * @since 3.0
029 * @version $Id: KeyValue.html 972421 2015-11-14 20:00:04Z tn $
030 */
031public interface KeyValue<K, V> {
032
033    /**
034     * Gets the key from the pair.
035     *
036     * @return the key
037     */
038    K getKey();
039
040    /**
041     * Gets the value from the pair.
042     *
043     * @return the value
044     */
045    V getValue();
046
047}