题解 | #字符串最后一个单词的长度#

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.IOException;

// 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) {
             BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        int a=0;
        try {
            String s = br.readLine();
            int length = s.length();
            int i = s.lastIndexOf(' ');
            if(i==-1){
                a=length;    
            }
            a = length-i-1;
            System.out.println(a);
        } catch (IOException e) {
            e.printStackTrace();
        }

    }
}