Java ConcurrentMap putIfAbsent(ConcurrentMap map, K key, V value)

Description

put If Absent

License

Apache License

Declaration

public static <K, V> V putIfAbsent(ConcurrentMap<K, V> map, K key, V value) 

Method Source Code

//package com.java2s;
/**//from   w  w w .j av  a 2s .  c  o  m
 * Copyright 2010 Molindo GmbH
 *
 * 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.ConcurrentMap;

public class Main {
    public static <K, V> V putIfAbsent(ConcurrentMap<K, V> map, K key, V value) {
        V current = map.putIfAbsent(key, value);
        return current != null ? current : value;
    }
}

Related

1. getNewLogFactor(String factorName)
2. getSingleInstance(Class classType)
3. getTypeFromKind(String kind)
4. is(Class clazz, Collection> clazzes, ConcurrentMap, Boolean> cache)
5. isClassClass(Class clazz)
6. putIfAbsent(ConcurrentMap map, K key, V value)
7. putIfAbsent(ConcurrentMap map, K key, V value)
8. putIfAbsent(ConcurrentMap target, K key, V value)
9. putIfAbsent(final ConcurrentMap map, final K key, final V value)