Java Average Calculator

// java style to import library
import java.util.Scanner;

// class must alway have 1st letter as uppercase, CamelCase is Java Class convention
public class ScanPrimitives {
    public static void main(String[] args) {    
        Scanner input;

        double sampleInputInt = 0.0;
        double total = 0;

        // primitive int
        input = new Scanner(System.in);
        System.out.print("How many numbers do you want to average: ");
        try {
            sampleInputInt = input.nextInt();
            System.out.println(sampleInputInt);
        } catch (Exception e) {  // if not an integer
            System.out.println("Not an int (form like 159), " + e);
        }
        input.close();
        
        for (int i = 0; i < sampleInputInt; i += 1)
        {
            if (i == 0) {

                System.out.print("Add your first number: ");
                
            } else {

                System.out.print("Add another number: ");

            }
            input = new Scanner(System.in);
        try {
            double sampleInputDouble = input.nextDouble();
            System.out.println(sampleInputDouble);
            total += sampleInputDouble;
        } catch (Exception e) {  // if not an integer
            System.out.println("Not a double (form like 159 or 1.1), " + e);
        }
        input.close();

        }

        total /= sampleInputInt;

        System.out.print("Your average is: ");
        System.out.println(total);
        
    }
}
ScanPrimitives.main(null);

How many numbers do you want to average: 2.0
Add your first number: 1.0
Add another number: 3.0
Your average is: 2.0