Java tutorial
//package com.java2s; /* * The MIT License (MIT) * * Copyright (c) 2016 Lachlan Dowding * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in all * copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ import java.util.concurrent.ConcurrentHashMap; import java.util.concurrent.ConcurrentMap; import java.util.concurrent.ConcurrentSkipListMap; public class Main { /** * Returns a newly created Map object. * * @param <K> The class of Map keys. * @param <V> The class of Map values. * @return A newly created Map object. */ public static <K, V> ConcurrentMap<K, V> create() { return create(false); } /** * Returns a newly created Map object. * * @param sorted Whether the Map should maintain keys sorted in natural ascending order. * @param <K> The class of Map keys. * @param <V> The class of Map values. * @return A newly created Map object. */ public static <K, V> ConcurrentMap<K, V> create(boolean sorted) { ConcurrentMap<K, V> map; if (sorted) { map = new ConcurrentSkipListMap<K, V>(); } else { map = new ConcurrentHashMap<K, V>(); } return map; } }