Question

I have a HashMap with a key as an object of some class, and a value as another HashMap, who’s key is a String, and value is a Double:

HashMap<MyClass, HashMap<String, Double>> myHashMap;

I need a loop that will add keys (objects) and values (HashMaps) to this HashMap, but I cannot create a new HashMap variable in the loop as its ‘value’. Essentially, every MyClass object must have Strings with corresponding Doubles.

Is this possible? Does this even make any sense??

Answer 1

Example:

YourClass someObject = new YourClass();
//putting object to map with empty hashMap value
myHashMap.put(someObject, new HashMap<String,Double>());
//adding String,Double to created before hashMap value
myHashMap.get(someObject).put("PI", 3.14);