Java collections convert a string to a list of characters

Question

I would like to convert the string containing abc to a list of characters and a hashset of characters. How can I do that in Java ?

List

        

Answer 1

In Java8 you can use streams I suppose. List of Character objects:

List chars = str.chars()
    .mapToObj(e->(char)e).collect(Collectors.toList());

And set could be obtained in a similar way:

Set charsSet = str.chars()
    .mapToObj(e->(char)e).collect(Collectors.toSet());