Let Point be a generic type.We want to write a method that takes as parameter Point objects whose type parameter is the Number class,or any subclass of Number.We can do this by declaring the type of the method parameter as A) Point B) Point C) Point D) Point

Question

Let Point< T > be a generic type.We want to write a method that takes as parameter Point objects whose type parameter is the Number class,or any subclass of Number.We can do this by declaring the type of the method parameter as A) Point< Number > B) Point< ? super Number > C) Point< ? extends Number > D) Point< ? sub Number >

Quizplus · Accepted Answer

The wildcard <? extends Number> means that any class that inherits from Number can be used as the type parameter for the Point class. This allows us to pass in Point objects with any number subclass as its type parameter, satisfying the requirement set in the prompt.

Let Point< T > Be a Generic Type