Java Map Put putIfNull(Map map, Object key, Object defaultValue)

Description

put If Null

License

Open Source License

Declaration

@SuppressWarnings("all")
    public static void putIfNull(Map map, Object key, Object defaultValue) 

Method Source Code

//package com.java2s;

import java.util.Map;

public class Main {
    @SuppressWarnings("all")
    public static void putIfNull(Map map, Object key, Object defaultValue) {
        if (key == null)
            throw new IllegalArgumentException("key must be not null");
        if (map == null)
            throw new IllegalArgumentException("map must be not null");
        if (map.get(key) == null) {
            map.put(key, defaultValue);/*from   w w w . ja va  2  s  .c  o m*/
        }
    }
}

Related

1. putIfNotExists(Map map, K key, V value)
2. putIfNotNull(final Map map, final String name, final String value)
3. putIfNotNull(Map map, K key, V value)
4. putIfNotNull(Map> params, String key, T value)
5. putIfNotNullAndTrue(Map map, String key, Boolean boolValue)
6. putIfSet(Map config, String key, Object... values)
7. putIntoMap(Map m, T[] keys, S[] values)
8. putIntoMap(String key, Object value)
9. putItem(Map map, Object key, Object value)