Java ConcurrentModificationException异常原因和解决方法

//删除非此退货单对应的货位
                for (BusGoodsLocationVO locationVO : page.getRecords()) {
                    if (locationVO.getRefundOrderFlag() == 1 && locationVO.getIsSelected() == 0) {
                        page.getRecords().remove(locationVO);
                    }
                }

Iterator iterator = page.getRecords().iterator();
                while(iterator.hasNext()){
                    BusGoodsLocationVO locationVO = iterator.next();
                    if (locationVO.getRefundOrderFlag() == 1 && locationVO.getIsSelected() == 0) {
                        iterator.remove();
                    }
                }