/* Reverse digits of an integer.

* Example1: x = 123, return 321

* Example2: x = -123, return -321

*/

public class reverseInt {

public static int reverse(int x) {

int y = 0;

String yStr = "";

boolean neg = false;

if (x < 0) {

neg = true;

x = -x;

}

String xStr = Integer.toString(x);

int xLen = xStr.length();

if (xStr.charAt(xLen - 1) != '0') {

yStr += xStr.charAt(xLen - 1);

}

for (int i = 1; i < xLen; i++) {

yStr += xStr.charAt(xLen - 1 - i);

} // close for

try{

y =Integer.parseInt(yStr);

} catch(NumberFormatException e){

return 0;

}

if (neg) {

y = -y;

}

return y;

} // close reverse method

public static void main(String[] args) {

System.out.println(reverse(231));

System.out.println(reverse(2310));

System.out.println(reverse(1000));

System.out.println(reverse(-213648));

System.out.println(reverse(-1000000008));

}

}