How can interfaces replace the need for multiple inheritance when have existing classes

Question

First of all... Sorry for this post. I know that there are many many posts on stackoverflow which are discussing multiple inheritance. But I already know that Java does not

Answer 1

Well using Interface and single base class you are simply stating:

A) One object can be of only one type (Which is true in real life if you think , A pigeon is a bird, a toyota is a car , etc .. A pigeon is also an animal but every bird is animal anyway, so its hierarchically above the bird type -And in your OOP design Animal class should be base of Bird class in case you need to represent it -) and

B) can do many different things (A bird can sing, can fly . A car can run , can stop ,etc..)

which also fits the real life objects.

In a world where objects can be of multiple types (horizontally) Let's say a a dolphin is a mammal and also a sea animal, in this case multiple inheritance would make more sense. It would be easier to represent it using multiple inheritance.