字符串使用steam转List

List ddd =
        str.chars().mapToObj(c -> (char)c+"").collect(Collectors.toList());
ddd.forEach(t-> System.out.println(t));

转对象数组
Character[] dddd = ArrayUtils.toObject("abde de".toCharArray());

String str = "testString";

//[t, e, s, t, S, t, r, i, n, g]
Character[] charObjectArray =
        str.chars().mapToObj(c -> (char)c).toArray(Character[]::new);