Fetching 7 recent dates from arraylist

Hi experts,
I have been stuck with an issue for which I seek your support/advice.
I have an xml which returns numerous dates(say 150 or more) . I take all these dates from the xml date tag into an arraylist.
The following getter method will return the arraylist with all the dates which I have taken from XML.
     public ArrayList<Date> getDates() {
          return dates;
     }My query is, I need to have the 7 recent dates to be taken as a collection again, from this arraylist.
-3 dates before today, today's date, + 3 days dates after today. If today's date is not available, then the next immediate date will be the reference date for choosing -3 days and +3 days.
I hope, I am clear with my question.
I am going nuts thinking how to implement this for the past one day. If anyone has any idea regarding any simple methods which would help implementing this easily or any simple logic to implement this, kindly advice.
Any help in this regard will be well appreciated.
Looking Forward,
Anees

AneesAhamed wrote:
Kayaman,
I know this, but the real question is How to find
* the one that matches the closest to the current date
* if no today's date or 3 advanced dates are available, how to add, just the 3 recent dates (- 3 days dates)?
This logic is bit tough and that is what I am stuck with!Well that depends on how you want it to work. If there is no date for today available, do you want the previous date or the next date, or do you want the one that is closer?
I would basically divide it into parts like this:
Case 1. All dates are available - Iterate through the List until you find current date, then get that and index-1, index-2, index-3 and index+1, index+2, index+3.
Case 2. No current date or later dates are available - Iterate through the List until you get to the last one (and notice that it's not the current date), then get the last 3 dates.
Case 3. Dates are available with gaps between them (like a date every 4 days or so, this is possible isn't it?) - Still iterate through the List looking for the current date, but as soon as you notice that the previous date is before current date and the next date is after the current date, choose one of them as the 'current' and get the 3 surrounding dates too.
Basically there shouldn't be anything really difficult in this, if you know your requirements clearly.

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