Question

I have 2 maps as shown below and I want the output as a new Map in the required format shown below? Please suggest if this is possible.

Map<String,String> abc = new HashMap<String, String>();
abc.put("Apple", "Mobile");
abc.put("Apple", "Tablet");

Map<String,String> def = new HashMap<String, String>();
def.put("Mobile", "iphone5");
def.put("Tablet", "iMini");

Required o/p format”

Map<String,Map<String,String>> xyz= new HashMap<String, Map<String,String>>();

Example
{{Apple={Mobile=[iphone]},Apple={Tablet=[iMini]}}

Answer 1

Yes it is possible.

Map<String,Map<String,String>> mapOfMap = new HashMap<String,Map<String,String>>();

mapOfMap.put("map1", new HashMap<String,String>());

mapOfMap.put("map2", new HashMap<String,String>());