import java.util.Scanner;public class Main{    public static void main(String[] args){    Scanner in = new Scanner(System.in);    String s = in.nextLine();    CodeLength(s);     }public static void CodeLength(String s){    String [] str = s.split(" ");    int length = str.length;    System.out.println(str[length-1].length());}}

    

 

方法二：

import java.util.*;public class Main{    public static int lengthOfLast(String str) {        String[] s =str.split(" ");        return s[s.length-1].length();    }         public static void main(String[] args) {        Scanner scan = new Scanner(System.in);        while(scan.hasNext()){            String str = scan.nextLine();            System.out.println(lengthOfLast(str));        }    }}