src/main/java/com/workplacesystems/utilsj/collections/helpers/CollectionUtilities.java
public static <K,V> void reverse(Map<K,V> source, Map<V,K> target)
    {
        Iterator<K> i = source.keySet().iterator();
        while (i.hasNext())
        {
            K key = i.next();
            V value = source.get(key);
            target.put(value, key);
        }
    }
public static <K,V> void reverse(Map<K,V> source, Map<V,K> target)
    {
        Iterator<K> i = source.keySet().iterator();
        while (i.hasNext())
        {
            K key = i.next();
            V value = source.get(key);
            target.put(value, key);
        }
    }
public static < K , V > void reverse ( Map < K , V > source , Map < V , K > target ) { Iterator < K > i = source . keySet ( ) . iterator ( ) ; while ( i . hasNext ( ) ) { K key = i . next ( ) ; V value = source . get ( key ) ; target . put ( value , key ) ; } }
Take key and value pairs from source and create map from value to key in target.
Take key and value pairs from source and create map from value to key in target .