关于局部变量的小疑点

try {            String a1 = new String(uname.getBytes("ISO8859-1"), "UTF-8");            listAllroundInfo = this.allroundInfoService.findByItem(a1, Long.parseLong(userId));            List<Long> dlist=new ArrayList<Long>();            if(!listAllroundInfo.isEmpty()){            for(AllroundInfo allroundInfo:listAllroundInfo){                System.out.println(allroundInfo.getSerialNumber());                dlist.add(allroundInfo.getSerialNumber());            }            long ser = Collections.max(dlist);            }            if (ids.length > 0) {                int serialNumber = 1;                 for (int i = 0; i < ids.length; i++) {                    allroundInfo = new AllroundInfo();                    allroundInfo.setSerialNumber([color=#FF0000][b]ser[/b][/color]+1);                }            }        } catch (Exception e) {            e.printStackTrace();            return INPUT;        }        return SUCCESS;    }