Java Map Put putToListMap(Map mapOfLists, Object key, Object val)

Description

put To List Map

License

Apache License

Declaration

@SuppressWarnings({ "unchecked", "rawtypes" })
    public static void putToListMap(Map mapOfLists, Object key, Object val) 

Method Source Code

//package com.java2s;
//License from project: Apache License 

import java.util.ArrayList;

import java.util.List;
import java.util.Map;

public class Main {
    @SuppressWarnings({ "unchecked", "rawtypes" })
    public static void putToListMap(Map mapOfLists, Object key, Object val) {
        List list = (List<?>) mapOfLists.get(key);
        if (list == null) {
            list = new ArrayList<>();
            mapOfLists.put(key, list);//ww w  . j  av a 2  s  .com
        }
        list.add(val);
    }
}

Related

1. putParameter(String key, String value, Map map)
2. putPreferenceStoredMapValue(String keyOfPreference, String keyInMap, Object value)
3. putRowMap(Map map, String value)
4. putSafelyMap(Map> pathFeaturesMap, K1 featureDescriptor, K2 pathId, E featureValue)
5. putShort(Map properties, String name, short value)
6. putToMapIfNotNull(Map map, final String key, final String value)
7. putToMapMap(Map> map1, K1 key1, K2 key2, V value)
8. putUnique(Map map, long key, V v)