Java Map Add addToMap(Map map, K key, V value)

Description

Adds a key-value pair to a map unless the key or the value are null.

License

Open Source License

Parameter

Parameter	Description
map	Map to which the key-value pair will be added.
key	Key in the map.
value	Value added for the given key.
K	Type of keys.
V	Type of values.

Return

Map including added key-value pair.

Declaration

public static <K, V> Map<K, V> addToMap(Map<K, V> map, K key, V value) 

Method Source Code

//package com.java2s;
//License from project: Open Source License 

import java.util.*;

public class Main {
    /**/*  www  .j a  va 2 s  .  c o m*/
     * Adds a key-value pair to a map unless the key or the value are null.
     * <p>
     * A new map is created if the provided map is null.
     *
     * @param map   Map to which the key-value pair will be added.
     * @param key   Key in the map.
     * @param value Value added for the given key.
     * @param <K>   Type of keys.
     * @param <V>   Type of values.
     * @return Map including added key-value pair.
     */
    public static <K, V> Map<K, V> addToMap(Map<K, V> map, K key, V value) {
        if (map == null)
            map = new HashMap<>();
        if (key == null || value == null)
            return map;
        map.put(key, value);
        return map;
    }
}

Related

1. addToListMap(Map> map, T key, T value)
2. addToListMap(Map> map, T key, V val)
3. addToListMap(Map> map, TKey key, TValue value)
4. addToMap(Map map, int initialKey, T value)
5. addToMap(Map data, K key, T value, Class clz)
6. addToMap(Map map, K key, V value)
7. addToMap(Map> cfs, String[] qualSplits, String[] splitQual)
8. addToMap(Map dest, Map src)
9. addToMap(Map aMap, T aKey, Float aValue)