把一个字符串，交换前后顺序后再输出

输入: 字符串 输出: 字符串 样例输入: abcde 样例输出: edcba

参考解答

public static void main(String[] args) {
  System.out.println(reverse("abcde"));
}

public static String reverse(String input) {
  char[] chars = input.toCharArray();
  for (int i = 0; i < chars.length / 2; i++) {
    char t = chars[i];
    chars[i] = chars[chars.length - i - 1];
    chars[chars.length - i - 1] = t;
  }
  return new String(chars);
}