题解 | #字符串最后一个单词的长度#

import java.util.Scanner; public class Main { public static void main (String[] args) { Scanner scanner = new Scanner(System.in); String s = scanner.nextLine(); int lastIndex = s.lastIndexOf(" "); if (lastIndex > 0) { String newStr = s.substring(lastIndex + 1); System.out.println(newStr.length()); } else { System.out.println(s.length()); } } }