Learning Java Program

import java.util.Scanner;
class ComputeAverage 

{
    public static void main(String[] args) 

  {
        Scanner input = new Scanner( System.in );
        int inputNumber, sum=0, count=0;    
        double average;
        System.out.print("Enter your first positive integer: ");
        inputNumber = input.nextInt();
        while (inputNumber != 0) 

        {
            sum += inputNumber; 
            count++;            
            System.out.print("Enter your next positive integer, or 0 to Stop: ");
            inputNumber = input.nextInt();
        }
        if (count == 0)

        {
            System.out.println("You didn't enter any data!");
        }
        else 

        {
            average = ((double)sum) / count;
            System.out.println();
            System.out.println("You entered " + count + " positive integers.");
            System.out.printf("Their average is %1.3f.\n", average);
        }
    }
}

Enter your first positive integer: 12
Enter your next positive integer, or 0 to Stop: 45
Enter your next positive integer, or 0 to Stop: 87
Enter your next positive integer, or 0 to Stop: 0

You entered 3 positive integers.
Their average is 48.000.