MySQL查询不执行

Question

我已通过我的网络应用运行此查询

   select emp.empname,
   max(case months when 'jan' then SUBSTRING(TIMEDIFF('04:00','02:00'),1,5)  
   else '-' END) as  jan
   from permission perm, employee emp
   where emp.employeeid=permissionid 
   and permissionid=_id;

它在本地完美运行并给出了值，但在服务器上它给出了对象而不是值。

1. Ans in values- 02:00

2. 对象中的答案 - [B @ 5451654

   List<Object> takenlist=iService.Servicefetchallpermbalance(id);
   
   for (int index = 0; index < takenlist.size(); index++)
   {
           Object row[] = (Object[]) takenlist.get(index);
           System.out.println((String)(row[1]));        
   }