Here you can find the source of newConcurrentHashMap()
public static <K, V> ConcurrentHashMap<K, V> newConcurrentHashMap()
//package com.java2s; /*//from w ww . j a va 2s. c o m * Copyright (C) 2012 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ import java.util.concurrent.ConcurrentHashMap; public class Main { public static <K, V> ConcurrentHashMap<K, V> newConcurrentHashMap() { return new ConcurrentHashMap<K, V>(); } }