java整行读入解题

简单题，熟悉怎么使用：

import java.util.Scanner;

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