Covariance, Invariance and Contravariance explained in plain English?

Covariance, Invariance and Contravariance explained in plain English?

java covariance contravariance

java

Give examples of functions which demonstrate covariance and contravariance in the cases of both overloading and overriding in Java? [closed]

java covariance contravariance

java

Generics : List<? extends Animal> is same as List<Animal>?

java generics covariance extends contravariance

java