单词之间用空格隔开,所以用空间将其分割为字符串数组,取最后一个数组,然后打印字符串的长度即可 public static void main(String[] args) { System.out.println("请输入多个单词"); Scanner sc = new Scanner(System.in); String in = sc.nextLine(); String[] ins = in.split(" "); String cs = ins[ins.length-1]; System.out.print(cs.length()); }