Differences between Abstract Class and Interfaces

Abstract class	Interface
A class can extend one abstract class Abstract class contains abstract as well as non abstract methods In this, multiple inheritance is not supported Abstract class defines few or none of the methods. Abstract classes should have sub classes Any class can extend an abstract class	A interface can extend several interfaces Interface contains only abstract methods In this, multiple inheritance is supported. Interface declares all the methods Interface must implementation by classes. Only an interface can extend another interface.