How to shuffle characters in a string without using Collections.shuffle(…)?

Question

How do I shuffle the characters in a string (e.g. hello could be ehlol or lleoh or ...). I don\'t want to use the Collections.shuffle(...) method, is there anyt

Answer 1

Without external libraries, for those who do not mind using Collections.shuffle():

static String shuffle(String string){

    List list = string.chars().mapToObj(c -> new Character((char) c))
                                         .collect(Collectors.toList());
    Collections.shuffle(list);
    StringBuilder sb = new StringBuilder();
    list.forEach(c -> sb.append(c));

    return sb.toString();
}