Java tutorial
/** * Copyright (c) 2000-present Liferay, Inc. All rights reserved. * * This library is free software; you can redistribute it and/or modify it under * the terms of the GNU Lesser General Public License as published by the Free * Software Foundation; either version 2.1 of the License, or (at your option) * any later version. * * This library 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 Lesser General Public License for more * details. */ package com.liferay.portal.kernel.util; import java.util.Collections; import java.util.Dictionary; import java.util.Enumeration; import java.util.HashMap; import java.util.Map; /** * @author Shuyang Zhou */ public class HashMapDictionary<K, V> extends Dictionary<K, V> { public HashMapDictionary() { } public HashMapDictionary(Map<K, V> map) { _map.putAll(map); } @Override public Enumeration<V> elements() { return Collections.enumeration(_map.values()); } @Override public V get(Object key) { return _map.get(key); } @Override public boolean isEmpty() { return _map.isEmpty(); } @Override public Enumeration<K> keys() { return Collections.enumeration(_map.keySet()); } @Override public V put(K key, V value) { return _map.put(key, value); } public void putAll(Map<? extends K, ? extends V> map) { _map.putAll(map); } @Override public V remove(Object key) { return _map.remove(key); } @Override public int size() { return _map.size(); } @Override public String toString() { return _map.toString(); } private final Map<K, V> _map = new HashMap<>(); }