题解 | #翻转单词序列#

import java.util.*;

public class Solution {
    public String ReverseSentence(String str) {
        String[] ss = str.split(" ");

         Stack<String> st = new Stack<>();
        StringBuilder sb = new StringBuilder();

        for(String s : ss){
            st.push(s);
        }

        while(!st.isEmpty()){
            sb.append(st.pop());
            sb.append(" ");
        }

        sb.deleteCharAt(sb.length() - 1);
        return sb.toString();
    }
}