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;

public class Main{
    public static void main(String[] args) throws IOException {
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
        String str = reader.readLine();
        System.out.println(getLastWordLen(str));
    }

    private static int getLastWordLen(String s){
        int len = 0, i = s.length()-1;
        while(i >= 0 && s.charAt(i) != ' '){
            len++;
            i--;
        }
        return len;
    }
}