Difference between HashMap and Map in Java..? [duplicate]
Solution 1:
Map is an interface, i.e. an abstract "thing" that defines how something can be used. HashMap is an implementation of that interface.
Solution 2:
Map<K,V> is an interface,
HashMap<K,V> is a class that implements Map.
you can do
Map<Key,Value> map = new HashMap<Key,Value>();
Here you have a link to the documentation of each one: Map, HashMap.