what is difference between interface and abstract class in java 8 code example
Example 1: difference between abstract and interface
Interface
1) Interface contains only abstract methods
2) Access Specifiers for methods in interface
must be public
3) Variables defined must be public , static ,
final
4) Multiple Inheritance in java is implemented
using interface
5) To implement an interface we use
implements keyword
Abstract Class
1) Abstract class can contain abstract methods,
concrete methods or both
2) Except private we can have any access
specifier for methods in abstract class.
3) Except private variables can have any access
specifiers
4)We cannot achieve multiple inheritance using
abstract class.
5)To implement an interface we use implements
keyword
Example 2: java abstract vs interface
you can extend only one abstract class, but you can implement as much interfaces as you would need