List<ResponseClient> responseClientListSelectedList = new ArrayList<>();

對List排序：常用的內部類實現比較器，但是是對日期排序，最初：

Collections.sort(responseClientListSelectedList, new Comparator<ResponseClient>() {
            @Override
            public int compare(ResponseClient o1, ResponseClient o2) {
                return (int)(o1.getCreateTime().getTime() - o2.getCreateTime().getTime());
            }
        });
 

 Collections.sort(responseClientListSelectedList, new Comparator<ResponseClient>() {
            @Override
            public int compare(ResponseClient o1, ResponseClient o2) {
                return o1.getCreateTime().compareTo(o2.getCreateTime());
            }
        });
 

// 時間排序
        Collections.sort(responseClientListSelectedList, (o1, o2) -> (o2.getCreateTime().compareTo(o1.getCreateTime()))
        );