Book new_novel=new Book (); You have to create another class that extends the abstract class. Then you can create an instance of the new class. Notice that setTitle method is abstract too and has no ...

Types of Inheritance Java Abstraction The abstract keyword is a non-access modifier, used for classes and methods: Abstract class: is a restricted class that cannot be used to create objects (to ...

Our second big rule about using abstract concerns the relationship between abstract method and the classes in which the are defined. If a class defines any abstract methods (or, as we will see, ...

The Java Tutorial goes on to list bullets for when an abstract class should be considered and for when an interface should be considered. Unsurprisingly, these are derived from the previously ...