Since Java 8, it can have default and static methods also 2) Abstract class doesn't support multiple inheritance Interface supports multiple inheritance
Java Classes et méthodes abstraites ▫ Exemple public abstract class AnimalCompagnie{ Soit sous forme d'interface de méthodes abstraites dont on est
A Java interface is a collection of abstract methods and constants Different from classes: We cannot create an instance of an interface
Many Java API classes implement Comparable, and any class of your own design can be made comparable (How?) • We can write sort() without knowing anything about
public abstract class GeometricObject { private String color = "white"; private boolean filled; private java util Date dateCreated;
See also Java Precisely, section “Classes” and “Interfaces” ▷ Read more about Java Difference between extends and implements ▻ Multiple inheritance
Its implementation is provided by Rectangle and Circle classes Interface is defined by someone but implementation is provided by different implementation
The class containing an abstract method MUST be qualified as abstract Interfaces • Java does not support multiple inheritance
recommended Java solution in this case is an abstract class You must compile a file containing an interface definition before you can use it The