Interface is a service recuirments specification which describes the services offered. And it is 100% abstract class. If we don't want to allow a program to create an object for a class, then declare that class as abstract class. Methods in abstract class are may or may not abstract methods.

Interface is a service recuirments specification which describes the services offered. And it is 100% abstract class. If we don't want to allow a program to create an object for a class, then declare that class as abstract class. Methods in abstract class are may or may not abstract methods.

Abstract class can have absract and non abstract methods. Interface have only abstracts methods. It can have default and static methods also in some cases.