Java Map Put putIfAbsent(Map map, String name, String value)

Description

Adds the given key and value pair into the map if the map does not already contain a value for that key

License

Apache License

Declaration

public static void putIfAbsent(Map<String, String> map, String name, String value) 

Method Source Code

//package com.java2s;
/*// w  ww .j a  v a 2s. c om
 * Copyright 2016 Red Hat, Inc.
 *
 * Red Hat licenses this file to you 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.Map;

public class Main {
    /**
     * Adds the given key and value pair into the map if the map does not already contain a value for that key
     */
    public static void putIfAbsent(Map<String, String> map, String name, String value) {
        if (!map.containsKey(name)) {
            map.put(name, value);
        }
    }
}

Related

1. putIfAbsent(Map from, Map to)
2. putIfAbsent(Map map, K key, V value)
3. putIfAbsent(Map map, K key, V value)
4. putIfAbsent(Map map, K key, V value)
5. putIfAbsent(Map map, S key, T val)
6. putIfAbsentGet(Map map, K key, V value)
7. putIfNonNull(Map map, K key, V value)
8. putIfNotExist(Map map, K key, V value)
9. putIfNotExists(final K key, final V value, final Map map)