import java.util.Optional; import java.util.regex.Pattern; public class Solution { public static int solve(String s) { Pattern p = Pattern.compile("[^\\d+]"); // String outputString=s.replaceAll("[^\\d]+"," "); Optional x = p.splitAsStream(s) .filter(str -> !str.isEmpty()) .map(Integer::parseInt) .max(Integer::compareTo); return x.orElse(-1); } public static void main(String[] args) { System.out.println(solve("gh12cdy695m1")); } }