Java HashMap Create createHashMapIfNull(Map map)

Description

create Hash Map If Null

License

Open Source License

Declaration

public static <K, V> Map<K, V> createHashMapIfNull(Map<K, V> map) 

Method Source Code

//package com.java2s;
/*/*from  w  w w.  j av  a2s .co  m*/
 * Copyright (c) 2005, 2013, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code 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
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

import java.util.HashMap;

import java.util.Map;

public class Main {
    public static <K, V> Map<K, V> createHashMapIfNull(Map<K, V> map) {
        if (map == null) {
            map = new HashMap<K, V>();
        }
        return map;
    }
}

Related

1. createHashMap(int expectedMapSize)
2. createHashMap(int initialCapacity)
3. createHashMap(int initialCapacity)
4. createHashMap(int size)
5. createHashMap(Object key, Object value)
6. createHashMapWithSize(final int size)
7. getHashMap()
8. getHashMap()
9. getHashMap()