Java program to reverse a number.

Source:

class ReverseNumber {
   public static void main(String args[]) {
      int number = 123456789;
      int reverse = 0;
 
      System.out.println("Number  : " + number);
 
      while( number != 0 ) {
         reverse = reverse * 10;
         reverse = reverse + number%10;
         number = number/10;
      }
 
      System.out.println("Reversed: " + reverse);
   }
}

Output:

   $ java ReverseNumber 
   Number  : 123456789
   Reversed: 987654321