2 Dimension Set in Java

2 Dimension Set in Java
Simple stuff, just a tutorial.

import java.util.HashMap;

class Trial {

    public static void main(String[] args) {
        System.out.println("*** start ***");

        try {

            HashMap<Integer, HashMap<Integer, String>> mapHolder =
                    new HashMap<Integer, HashMap<Integer, String>>();

            HashMap<Integer, String> tmpMap1 = new HashMap<Integer, String>();
            tmpMap1.put(1, "Judy");
            tmpMap1.put(2, "Caty");

            HashMap<Integer, String> tmpMap2 = new HashMap<Integer, String>();
            tmpMap2.put(1, "John");
            tmpMap2.put(2, "Charles");
            tmpMap2.put(3, "Mike");

            mapHolder.put(1, tmpMap1);
            mapHolder.put(2, tmpMap2);

            System.out.println("2nd of the 2nd : " + mapHolder.get(2).get(2)); // Charles

        } catch (Exception e) {
            e.printStackTrace();
        }

        System.out.println("***  end  ***");
    }
}

http://pastebin.com/uh6Gy8iS