题解 | #翻转单词序列# JAVA语言，使用栈来做

public class Solution {
    public String ReverseSentence(String str) {
        StringBuilder res = new StringBuilder();
        Stack<String> stack = new Stack<String>();
        
        String[] strArr = str.split(" ");
        for (int i = 0;i < strArr.length;i++)  {
            stack.push(strArr[i]);
        }
        
        while (!stack.isEmpty()){
            res.append(stack.pop() + " ");
        }
        res.setLength(str.length()); //字符串的末尾会多出一个空格字符串来，要删掉
        return res.toString();
    }
}