Here you can find the source of buildMap(K key, V value)
public static <K, V> Map<K, V> buildMap(K key, V value)
//package com.java2s; /*/*from w w w .ja v a2s. c om*/ * (c) Copyright 2007-2011 by Volker Bergmann. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, is permitted under the terms of the * GNU General Public License. * * For redistributing this software or a derivative work under a license other * than the GPL-compatible Free Software License as defined by the Free * Software Foundation or approved by OSI, you must first obtain a commercial * license to this software product from Volker Bergmann. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" * WITHOUT A WARRANTY OF ANY KIND. ALL EXPRESS OR IMPLIED CONDITIONS, * REPRESENTATIONS AND WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE * HEREBY EXCLUDED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ import java.util.*; public class Main { public static <K, V> Map<K, V> buildMap(K key, V value) { Map<K, V> map = new HashMap<K, V>(); map.put(key, value); return map; } @SuppressWarnings({ "unchecked", "rawtypes" }) public static Map buildMap(Object... keyValuePairs) { Map map = new HashMap(); if (keyValuePairs.length % 2 != 0) throw new IllegalArgumentException( "Invalid numer of arguments. " + "It must be even to represent key-value-pairs"); for (int i = 0; i < keyValuePairs.length; i += 2) map.put(keyValuePairs[i], keyValuePairs[i + 1]); return map; } }