DateFormat 바꾸기

  public ArrayList<String> printDate(ArrayList<String> list){
        SimpleDateFormat input_sdf = new SimpleDateFormat("MMddHHmm");
        SimpleDateFormat output_sdf = new SimpleDateFormat("MM／dd    HH:mm");
        Date date = null;
        String outputStr;
        for(int i=0; i<list.size(); i++) {
            try {
                date = input_sdf.parse(list.get(i));
            } catch (java.text.ParseException e) {
                e.printStackTrace();
            }
            outputStr = output_sdf.format(date);
            list.set(i, outputStr);
        }
        return list;
    }