Difference between abstract class and interface

Abstract Class

• can be extended using keyword "extends"

• abstract keyword

• doesn't support multiple inheritance

• can have final, non-final, static and non-static variables

• can extend another Java class and implement multiple Java interfaces

• can have class members like private, protected, etc.

Interface

• can be implemented using keyword "implements"

• interface keyword

• supports multiple inheritance

• has only static and final variables

• can extend another Java interface only

• are public by default