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import java.util.Scanner;

@SuppressWarnings("Duplicates")

public class reverseIntMath {

public static void main(String[]args) {

int n = 0;

Scanner sc = new Scanner(System.in);

boolean invalidCheck = false;

System.out.println("Enter an integer to reverse: ");

while (!invalidCheck) {

String line = sc.nextLine();

try {

n = Integer.parseInt(line);

invalidCheck = true;

} catch (NumberFormatException e) {

System.out.println("Input must be an integer, please re-enter.\n");

invalidCheck = false;

}

}

System.out.println("Input Integer: " + n);

int reversed = reverseInt(n);

System.out.println("Reversed Integer: " + reversed);

}

private static int reverseInt(int n){

int reversed = 0;

int remainder = 0;

while(n != 0) {

remainder = n % 10;

n = (n - remainder) / 10;

reversed = (reversed * 10) + remainder;

}

return reversed;

}

}