abstract class extends non abstract class

An abstract class can have instances created using the constructor of the abstract class B An abstract class can be extended A subclass of a non-abstract superclass can be abstract

Le mécanisme des classes abstraites permet de définir des abstract class B extends A //abstract non obligatoire ici mais conseillé {public abstract void f1() { }; 

A subclass of an abstract class can be instantiated if it overrides all abstract methods by implementation them ¦ A subclass that does not implement all of the

public class C extends B { public int two() { } public String three() { } } 20 CISC 124, Winter 2016, Topic 5: Abstract Classes Interfaces • An abstract class is not  

Which of the following is FALSE about abstract classes in Java a If we derive an abstract class and do not implement all the abstract methods, then the derived 

A non-abstract class derived from an abstract class must include actual To implement both interfaces, a class has to use explicit implementation either for the 

abstract methods cannot be contained in non-abstract classes if a subclass of an abstract class does not implement all the abstract methods, that subclass must 

public class Circle extends GeometricObject { implement all the abstract methods, the subclass It is possible to define an abstract class that contains no

It can, but does not have to, include abstract methods • Abstract classes can not be instantiated but they can be subclassed using the extends keyword