public String Print_header2s()
     {
         String sData_row;
         boolean savespace = false;
         Consumer_name = ten_khach_hang.getText().trim();
         if(Consumer_name.isEmpty())
         {
             Consumer_name = ".........................";
         }
         if(Consumer_name.contains("......")){
             savespace = true;
         }
         sData_row = "Ngày: " + sDate_time + "\n";
         if(!owner_name.isEmpty()){
            sData_row += owner_name  ; 
            if(!savespace){
                sData_row += "\n";
            }else{
                sData_row += ", ";
            }
         }
         if(!phone_number.isEmpty()){
            sData_row += "ĐT: " + phone_number +"\n";
         }
         if(!savespace){
            sData_row += "Khách hàng: " + Consumer_name + "\n";
         }
         return sData_row;
     }