参考代码:
import java.util.Scanner; import java.util.regex.Matcher; import java.util.regex.Pattern; public class Main { public static void main(String[] args) { Scanner scanner = new Scanner(System.in); String s = scanner.nextLine(); Pattern p = Pattern.compile("\\d"); Matcher q = p.matcher(s); int cnt = 0; while(q.find()) cnt++; System.out.print(cnt); } }
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