How to convert Map to Map ? (option : using guava)

Question

I have a Map the String key is nothing but numeric value like \"123\" etc. I\'m getting numeric value because this values are

Answer 1

Answer using Java 8 and jOOλ

private static  Map mapKeys(Map map, Function keyMapper) {
    return Seq.seq(map).map(t -> t.map1(keyMapper)).toMap(Tuple2::v1, Tuple2::v2);
}