力扣的移除无效括号的题，如果输入“))((” 则会输出“）”,该如何修改呢？

public static String name(String s) {

        StringBuffer sb = new StringBuffer(s);
        Stack<Integer> stack = new Stack<Integer>();
        for (int i = 0; i < sb.length(); i++) {
            if (sb.charAt(i) == '(') {
                stack.push(i);
            } else if (sb.charAt(i) == ')') {
                if (stack.empty()) {
                    sb.deleteCharAt(i);
                } else {
                    stack.pop();
                }

            }

        }

        while (!stack.empty()) {

            int i =  stack.pop();

            sb.deleteCharAt(i);

        }

        return sb.toString();
    }

https://blog.csdn.net/haut_ykc/article/details/102244078