1 题目

2 代码

import java.io.BufferedReader;
import java.io.InputStreamReader;

public class B1009 {
    public static void main(String[] args) throws Exception {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        String[] str = br.readLine().split(" ");

        for (int i = str.length - 1; i > 0; i--) {
            System.out.print(str[i] + " ");
        }
        System.out.print(str[0]);
    }
}

3 要点

（1）以空格分割字符串，再反转输出即可。