题解 | #字符串最后一个单词的长度#

import java.util.Scanner;
import java.util.Scanner;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String line = scanner.nextLine();
        Pattern pattern = Pattern.compile("(\\w+)$");
        Matcher matcher = pattern.matcher(line);
        if (matcher.find()) {
            String s = matcher.group(0);
            System.out.println(s.length());

        }
    }
}