Reverse number revised Listing 6.2 (shown below, pg 277 in the text), is an exam

Question

Reverse number revised

Listing 6.2 (shown below, pg 277 in the text), is an example that demonstrates the use of a do…while loop to reverse an integer number. Modify the program so that the reversal process is called from a value returning method instead of included in the main program. Use a value returning method that accepts the integer as a parameter and returns the reversed number.

import java.util.Scanner;

public class ReverseNumber

{

   //-----------------------------------------------------------------

   // Reverses the digits of an integer mathematically.

   //-----------------------------------------------------------------

   public static void main(String[] args)

   {

     int number, lastDigit, reverse = 0;

Scanner scan = new Scanner(System.in);

System.out.print("Enter a positive integer: ");

     number = scan.nextInt();

//This part needs to go in its own method now ^_^

     do {

         lastDigit = number % 10;

         reverse = (reverse * 10) + lastDigit;

         number = number / 10;

     } while (number > 0);

//Call your new method here (or within the output statement below)

     System.out.println("That number reversed is " + reverse);

}

}

Explanation / Answer

import java.util.Scanner;

class ReverseNumber
{
    int reverse;
  
    public int getResult(int number)
    {
         while( number != 0 )
      {
          reverse = reverse * 10;
          reverse = reverse + number%10;
          number = number/10;
      }
      return reverse;
    }
   public static void main(String args[])
   {
      int number;
      ReverseNumber reverseNumber=new ReverseNumber();
      System.out.println("Enter the value to reverse");
      Scanner in = new Scanner(System.in);
      number = in.nextInt();
      
      
           System.out.println("Reverse of value is "+reverseNumber.getResult(number));
   }
}

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