题解 | #字符串最后一个单词的长度#

import java.util.Scanner;

// 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 in = new Scanner(System.in);
        // 注意 hasNext 和 hasNextLine 的区别
        int lastWordsLength = 0;
        if (in.hasNext()) {
            String content = in.nextLine().trim();
            if (content.length() < 5000) {
                if (content.contains(" ")) {
                    lastWordsLength = content.substring(content.lastIndexOf(" "),
                                                        content.length() - 1).length();
                } else {
                    lastWordsLength = content.length();
                }

                System.out.println(lastWordsLength);
            }

            //System.out.println(content.lastIndexOf(" "));



        }

    }
}