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

Creating two Simple Hashmaps: InnerMap and OuterMap

    HashMap> outerMap = new HashMap>();
    HashMap innerMap = new HashMap();

Populating the HashMaps

    innerMap.put("InnerKey", "InnerValue");
    outerMap.put("OuterKey", innerMap);

Retreiving values from HashMaps

    String value = ((HashMap)outerMap.get("OuterKey")).get("InnerKey").toString();
    System.out.println("Retreived value is : " + value);