Reverse number program in java

package javaprgms;

public class Reversenum {

            public static void main(String[] args) {

                        int rev=0;

                        int num=1234;

                        while(num>0){

                                    int rem=num%10;

                                    rev=rem+(rev*10);

                                    num=num/10;

                        }

                        System.out.println("Reverse Number" + rev);

            }

}

Output:

Reverse Number 4321