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);
        String str=in.nextLine();
        char[] chars = str.toCharArray();
        int length = chars.length;
        int res=0;
        for (int i = length-1; i>-1 ; i--) {
            if (i==0){
                res=length;
                break;
            }
         if (chars[i]==' '){
             res=length-1-i;
             break;
         }
        }
        System.out.println(res);
    }
}