what is the difference between Map<String,String> map = new HashMAp<>() and HashMap map=new HashMAp<>() code example

Example: difference between hashmap and map java

Hash map: 

	-> It is the implementation of map interface.
	-> It can contain null values and keys.
	-> It doesn't maintain input order.

Map: 

	-> It is an interface
	-> Map has two implementation
	-> Tree Map
	-> Hash Map
	-> Tree Map maintains the input order .
	-> It will not allow any null values.
	-> Duplicate keys are not allowed in the map