How to fetch JSONObjects from JSONArray that have date property between the start dat

[hasnainahmad]

I have JSONArray that have 57 JSONObjects, each object has 8 key/value pair properties. In which there is a “publishdate” property. I want to fetch each objects that has “publishdate” within a month.
Here is my code.

  String startDateStr = "2015-10-01 00:00:00";
        String endDateStr = "2015-12-25 00:00:00";

        DateTimeFormatter fmt = DateTimeFormat.forPattern("yyyy-MM-dd HH:mm:ss");
        DateTime startDate = fmt.parseDateTime(startDateStr);
        DateTime endDate = fmt.parseDateTime(endDateStr);
        DateTime lastDateOfEachMonth; // This DateTime used for fetching each motn data.

        int daysInMonth;

        while (startDate.equals(endDate)) {
            
            daysInMonth = startDate.dayOfMonth().getMaximumValue();
            lastDateOfEachMonth = startDate.plusDays(daysInMonth - 1);
            
            // Here i want to fetch data between the startDate to lastDateOfEachMonth. Means i want to make ArrayList of data from the
            // "JSONArray" that contains only one month data. and put it the whole data to first index of the ArrayList.
            // The data should be fetched according to publishdate.

            startDate = lastDateOfEachMonth;
            // This loop will until startDate reaches to endDate
        }

Which data structure is best for above scenario ArrayList or any other?
I have attach an image that shows JSONArray of JSONObjects.