How to find sum of digits in an alpha numeric value

import java.util.Scanner;

public class SumofDigitsInAlphanumeric {

	// Define the functional interface with single abstract method.
	interface SumOfDigitsInAlphanumeric {
		public int sumOfDigts(String strVal);
	}

	@SuppressWarnings("resource")
	public static void main(String[] args) {
		Scanner inpAlphaNumeric = new Scanner(System.in);
		// Input an alphanumeric value
		System.out.print("Enter an alphanumeric value=");
		String strValue = inpAlphaNumeric.next();
		System.out.println("The String value is=" + strValue);

		/* Define the Lambda expression for the user defined functional interface */
		SumOfDigitsInAlphanumeric ds = ((strVal) -> {
			int lenOfStr = strVal.length(), sum = 0;
			while (--lenOfStr >= 0)
				if (Character.isDigit(strVal.charAt(lenOfStr)))
					sum += Character.getNumericValue(strVal.charAt(lenOfStr));
			return sum;
		});
		System.out.println("The sum of digits in the given string is " + strValue + " is= " + ds.sumOfDigts(strValue));
		System.out.println("The sum of digits in an other string is = " + ds.sumOfDigts("Jw2@#5Yu7"));
	}
}