题解 | #句子逆序#

import java.util.Scanner;

// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        // 注意 hasNext 和 hasNextLine 的区别
        String sentence = in.nextLine();
        String[] words = sentence.split(" ");
        StringBuilder sb = new StringBuilder("");
        int n = words.length;
        for(int i=n-1 ; i>=0 ; --i){
            sb.append(words[i]);
            if(i != 0){
                sb.append(' ');
            }
        }
        System.out.print(sb.toString());
    }

}