Representing in a collection

Question

I have some data in a table like the following
date1 date2 date3
id1 10 12 13
id2 11 12 9
id3 7 9 4
I need to store this in a way so that a value can be easily retrieved by calling something like get(id1,date3), which should return 13.
I am currently thinking off something like this
Hashmap<int, HashMap<Date, value>>
But just wondering if there is an easier/better approach to do this?
But just wondering if there is an easier/better approach to do this?

Answer 1

Personally, I would set up a class that contains proper Java variables to store your data, eg:public class myTableData {
private int id; // assuming your id is a number;
private Calendar date = new Calendar();
public myTableData(String[] data) {
  id = Integer.parseInt(data[0]).intValue;
  // assuming your date1, date2 and date3 are year, month, day
  date.set(Integer.parseInt(data[1]).intValue, Integer.parseInt(data[2]).intValue, Integer.parseInt(data[3]).intValue);
... // getter and setter methods
}then you simply need a HashMap<myTableData>.