Maintain monthly data in a Quarter

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JDBC

Dear All,

I am making a form in jsp where i want to maintain the data of students in a financial year.
For that i have 4 Quarters.In each Quarter i have 3 months.Is it right to make an ArrayList of each quarter.

eg.
ArrayList Quarter1=new ArrayList();

If ArrayList is the correct option then how do i add months into the ArrayList.
Any help would be highly appreciated.