Question
What’s the difference between an Abstract Class and Interface in Java?
Answers
The primary difference between an abstract class and interface is that an interface can only possess declaration of public static methods with no concrete implementation while an abstract class can have members with any access specifiers (public, private etc) with or without concrete implementation.
Another key difference in the use of abstract classes and interfaces is that a class which implements an interface must implement all the methods of the interface while a class which inherits from an abstract class doesn’t require implementation of all the methods of its super class.
A class can implement multiple interfaces but it can extend only one abstract class.   Your Comment




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