How to find sum of digits in an alpha numeric value

import java.util.ArrayList;
import java.util.Scanner;

public class SumofIntegersInAlphanumeric {

	public static void main(String args[]) {

		Scanner inpScan = new Scanner(System.in);
		System.out.print("Enter an Alphanumeric value= ");
		String inpStr = inpScan.next();
		System.out.println("The entered Alphanumeric string is= " + inpStr);
		ArrayList<Character> arrChars = new ArrayList<Character>();
		for (char ch : inpStr.toCharArray())
			arrChars.add(ch);
		System.out.println("The list of Characters are= " + arrChars);

		// Apply filter, map and reduce methods on the extracted List of characters
		int sumDigits = arrChars.stream().filter(c -> Character.isDigit(c)).map(x -> Character.getNumericValue(x))
				.reduce(0, (a, b) -> a + b);
		System.out.println("The sum of Digits in the given " + inpStr + " is " + sumDigits);
	}
}