Hi,
very short and simple:
Map<keytype,>> myMapOfLists = new HashMap<keytype,>>();
Map<string,>> familyMap = new HashMap<string,>>();
List<person> personList = familyMap.get("The Robinsons");
</person>
Hope this will give you a quick Idea... Actually, there are different types of Maps but since you want a Hash -> HashMap is the one you need...
Cheers, Arndt