public class ReverseInteger {

    /*Reverse digits of an integer.
Example1: x = 123, return 321
Example2: x = -123, return -321*/

    public static void main(String[] args) {
        reverseMethod(123456);
        reverseMethod(12345);
    }

    public static void reverseMethod(Integer a) {
        String s = Integer.toString(a);
        char[] chars = s.toCharArray();
        for (int i = 0; i < chars.length / 2; i++) {
            chars[i] = (char) (chars[chars.length - 1 - i] + chars[i]);
            chars[chars.length - 1 - i] = (char) (chars[i] - chars[chars.length - 1 - i]);
            chars[i] = (char) (chars[i] - chars[chars.length - 1 - i]);
        }
        for (int i = 0; i < chars.length; i++) {
            System.out.println(chars[i]);
        }
    }

}