storing hashMap in a hashMap

Question

i am reading data from a text file and want to store HashMap in another HashMap..

HashMap>

how to

Answer 1

Example:

Creating and populating the maps

Map> outerMap = new HashMap>();
Map innerMap = new HashMap();    
innerMap.put("innerKey", new Value());

Storing a map

outerMap.put("key", innerMap);

Retrieving a map and its values

Map map = outerMap.get("key");
Value value = map.get("innerKey");