quick way to get charat

1String str = "a really, really long string";
2for (int i = 0, n = str.length(); i < n; i++) {
3    char c = str.charAt(i);
4}
5

1char[] chars = str.toCharArray();
2for (int i = 0, n = chars.length; i < n; i++) {
3    char c = chars[i];
4}
5