关于Java新特性 ::

try {
    Preconditions.checkState(!CollectionUtils.isEmpty(ksMoveInOrderDTOS), "param is empty");

    final Set<String> set = ksMoveInOrderBinDTOS.stream().map(KsMoveInOrderBinDTO::getKsBinCode).collect(Collectors.toSet());
    final Set<String> set1 = ksMoveInOrderBinDTOS.stream().map(KsMoveInOrderBinDTO -> KsMoveInOrderBinDTO.getKsBinCode()).collect(Collectors.toSet());

//     KsMoveInOrderBinDTO::getKsBinCode  等价于  KsMoveInOrderBinDTO -> KsMoveInOrderBinDTO.getKsBinCode()

    Preconditions.checkState(set.size() == ksMoveInOrderDTOS.size(),"同一批次料箱编码重复");
    ksMoveInOrderDTOS.forEach(v -> {
        ValidateService moveInOrderValidateService = (ValidateService) applicationContext.getBean(moveInValidateServiceName);
        moveInOrderValidateService.doValidate(v);

    });
} catch (Exception e) {
    throw new DataValidateException(e.getMessage());
}

关于Java新特性 ::

原文：https://www.cnblogs.com/zuiqiangJAVA/p/15223530.html