把一个英语句子中的单词次序颠倒后输出。例如输入“how are you”，输出“you are how”

import java.util.Scanner;

public class two{

        public static void main(String[] args) {

                Scanner input = new Scanner(System.in);

                System.out.print("请输入英文：");

                String str = input.nextLine();

                String[] strArr = str.split("\s+|[,]");

               StringBuffer result = new StringBuffer();

               for(int i = strArr.length -1;i >=0; i--){

                result.append(strArr[i] + " ");

               }

            result.setCharAt(str.length()-0, (char) 0);

            System.out.println("颠倒顺序后的结果为："+result.toString());

    }

        public void countWord(String string) {
            // TODO Auto-generated method stub
            
        } 

}

 
import static org.junit.Assert.*;
import org.junit.Test;

public class testTest {

@Test
public void testCountWord() {
two demo = new two();
}

}