主要利用split函数分割字符串
public class Main{
public static void main(String[] args){ Scanner sc = new Scanner(System.in);
String str = sc.nextLine();
String[] res = str.split(" ");
for(int i=res.length-1;i>=0;i--){
System.out.print(res[i]);
if(i!=0)System.out.print(" ");
}
}
}