özkan pakdilGiven a string, that contains special character together with alphabets (‘a’ to ‘z’ and ‘A’ to ‘Z’), reverse the string such a way that special characters are not affected.
Example
input "abc-defg" return "gfe-dcba"
String reverse(String input) {
Stack<Character> result = new Stack<>();
StringBuilder result2 = new StringBuilder();
char[] in = input.toCharArray();
for (char c : in) {
if (Character.isLetter(c)) {
result.push(c);
}
}
for (char c : in) {
if (Character.isLetter(c)) {
result2.append(result.pop());
} else {
result2.append(c);
}
}
return result2.toString();
}
