Use a loop to display and calculate the sum of the evenly positioned digits in a string

Question:

In Java, how do we use a loop to display and calculate the sum of the evenly positioned digits?

Eg. If input is 29664 then output is 15 (9+6)

Code:

import java.util.*;
 
public class SumOfEvensPositions {
 
   public static void main(String[] args) {
 
      Scanner sc = new Scanner(System.in);
 
      System.out.print("Enter a number: ");
      String str = sc.nextLine();
 
      try {
         Integer.parseInt(str); 
 
         int total=0;
         for(int i=1;i<str.length();i=i+2){
            System.out.println("Pos " + (i+1) + " : "  + str.charAt(i));
            total = total + Character.getNumericValue(str.charAt(i));
         }
         System.out.println("Total: " + total);
 
      } catch(NumberFormatException e) { 
         System.out.println("Invalid number");
      } 
   }
}
 

Output:

$ java SumOfEvensPositions
Enter a number: 29664
Pos 2 : 9
Pos 4 : 6
Total: 15