Java ConcurrentHashMap createConcurrentHashMap()

Description

Creates a concurrent map with lesser segements to save memory.

License

Open Source License

Parameter

Parameter	Description
K	a parameter
V	a parameter

Return

the concurrent hashmap

Declaration

public static final <K, V> ConcurrentHashMap<K, V> createConcurrentHashMap() 

Method Source Code

//package com.java2s;
/*//from w  w  w .  j av  a  2s  .  c o m
 * Copyright 2004 - 2008 Christian Sprajc. All rights reserved.
 *
 * This file is part of PowerFolder.
 *
 * PowerFolder is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation.
 *
 * PowerFolder 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with PowerFolder. If not, see <http://www.gnu.org/licenses/>.
 *
 * $Id: Util.java 20555 2012-12-25 04:15:08Z glasgow $
 */

import java.util.concurrent.ConcurrentHashMap;

public class Main {
    /**
     * Creates a concurrent map with lesser segements to save memory. The
     * default concurrency of the maps are 4 (instead of 16 default).
     * <p>
     * 4 should be more suitable value for in-powerfolder us and procudes lesser
     * Segements.
     * 
     * @param <K>
     * @param <V>
     * @return the concurrent hashmap
     */
    public static final <K, V> ConcurrentHashMap<K, V> createConcurrentHashMap() {
        return createConcurrentHashMap(16);
    }

    /**
     * Creates a concurrent map with lesser segements to save memory. The
     * default concurrency of the maps are 4 (instead of 16 default).
     * <p>
     * 4 should be more suitable value for in-powerfolder us and procudes lesser
     * Segements.
     * 
     * @param <K>
     * @param <V>
     * @param intialSize
     *            the initial size of the map.
     * @return the concurrent hashmap
     */
    public static final <K, V> ConcurrentHashMap<K, V> createConcurrentHashMap(int intialSize) {
        return new ConcurrentHashMap<K, V>(intialSize, 0.75f, 4);
    }
}

Related

1. createConcurrentHashMap()
2. getConcurrentHashMap()
3. getDoubleSafe(ConcurrentHashMap map, String key)
4. getMapSafe( ConcurrentHashMap> map, String key)
5. max(ConcurrentHashMap map)