Slip No 30 QA

Q.Write a java program to accept a number from a user, if it is zero then throw user defined Exception “Number is Zero”. If it is non-numeric then generate an error “Number is Invalid” otherwise check whether it is palindrome or not. [15 M]

import java.util.Scanner;

// User-defined Exception
class ZeroNumberException extends Exception
{
    public ZeroNumberException(String msg)
    {
        super(msg);
    }
}

public class PalindromeCheck
{
    public static void main(String args[])
    {
        Scanner sc = new Scanner(System.in);

        try
        {
            System.out.print("Enter a number: ");
            String input = sc.nextLine();

            int num = Integer.parseInt(input);   // may throw NumberFormatException

            if(num == 0)
            {
                throw new ZeroNumberException("Number is Zero");
            }

            int original = num;
            int rev = 0;

            while(num > 0)
            {
                int rem = num % 10;
                rev = rev * 10 + rem;
                num = num / 10;
            }

            if(original == rev)
                System.out.println("Number is Palindrome");
            else
                System.out.println("Number is Not Palindrome");
        }
        catch(NumberFormatException e)
        {
            System.out.println("Number is Invalid");
        }
        catch(ZeroNumberException e)
        {
            System.out.println(e.getMessage());
        }

        sc.close();
    }
}