java 数组list 找出最早最晚

        // 找到最早的小时和最晚的小时，并具体到分钟
        Optional<LocalTime> earliestTime = adminEventInfoDTOList.stream()
                .map(dto -> dto.getCreateTime().toLocalTime())
                .min(LocalTime::compareTo);

        Optional<LocalTime> latestTime = adminEventInfoDTOList.stream()
                .map(dto -> dto.getCreateTime().toLocalTime())
                .max(LocalTime::compareTo);
        DateTimeFormatter formatter = DateTimeFormatter.ofPattern("HH:mm");
        earliestTime.ifPresent(dto -> {
            adminPatrolEventStatisticsDTO.setEarliestTime("最早：" + dto.format(formatter));
        });
        latestTime.ifPresent(dto -> {
            adminPatrolEventStatisticsDTO.setLatestTime("最晚：" + dto.format(formatter));
        });