no reverse in java

import java.util.Scanner;
public class p3
{

    public static void main(String args[])
    {
        Scanner se=new Scanner(System.in);
        int a,b,temp,ans=0;
        System.out.println(" Enter the value: ");
        a=se.nextInt();
        temp=a;
        while(temp!=0)
        {
            b=temp%10;
            ans=(ans*10)+b;
            temp=temp/10;
        }
        System.out.println(a+"  revers->  "+ans);
    }

}