package de.edu.hsfulda.ciip.tdd; import java.util.regex.Matcher; import java.util.regex.Pattern; public class BownlingCalculator { public int evaluate(String listOfThrows) { Matcher matcher = Pattern.compile("\\d").matcher(listOfThrows); int sum =0; while (matcher.find()) { sum+=Integer.parseInt(matcher.group()); } return sum; } }