Difference between abstract class and interface ?
Interface Abstract Class
1) Interface contains only abstract methods 1) Abstract class can contain abstract methods,
concrete methods or both
2) Access Specifiers for methods in interface
must be public
2) Except private we can have any access
specifier for methods in abstract class.
3) Variables defined must be public , static ,
final
3) Except private variables can have any access
specifiers
4) Multiple Inheritance in java is implemented
using interface
4)We cannot achieve multiple inheritance using
abstract class.
5) To implement an interface we use
implements keyword
5)To implement an interface we use implements
keyword
