Comparison between Abstract Class and interface

Abstract Class and interface

Abstract Class	Interface
A Java abstract class can have instance methods that implement a default behavior.	Java interface are implicitly abstract and cannot have implementations
An abstract class may contain non-final variables.	Variables declared in a Java interface is by default final
A Java abstract class can have the usual flavors of class members like private, protected, etc..	Members of a Java interface are public by default
A Java abstract class should be extended using keyword “extends”.	Java interface should be implemented using keyword “implements”.
A Java class can extend only one abstract class.	A Java class can implement multiple interfaces