Force a class to override the .equals method

I have a bunch of class who implement a common interface : Command.

And this bunch of class goes to a Map.

To get the Map working correctly, I need to each class who implements Command to override the Object.equals(Object other) method.

it's fine.

But i whould like to force the overriding of equals. => Have a compilation error when something who implement command dont override equals.

It's that possible ?

Edit : BTW , i will also need to forcing the override of hashcode...