Java Generics - How do I call a generic map with a successor object

Question

I wrote the following method

 validate(Map map)

And I want to call it with

dogMap = new HashMap

        

Answer 1

You have two options:

1. Change the signature of validate to YourReturnType validate(Map map) (assuming you do not want to add elements to it).
2. Create a new Map from the dogMap you want to pass: new HashMap(dogMap) and pass that object to validate.