Interface In Java | Java Interface Tutorial | Java Interface Example | Java Tutorial | Simplilearn

2. Agenda What is Java Interface? Need for Interface in Java Syntax: Java Interface Example: Java Interface Interface Nesting in Java Interface V/S Class Advantages of Interface Disadvantages of Interface

3. What is Java Interface?

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5. What is Java Interface? An interface is a container that stores the signatures of the methods to be implemented in the code segment.

6. Need for Interface in Java

7. Need for Interface in Java Multiple Inheritance Total Abstraction Loose Coupling

8. Syntax: Java Interface

9. Syntax: Java Interface Syntax Interface <Interface Name> { //Declare Constant Fields; //Declare Methods; //Default Methods; }

10. Example: Java Interface

11. Example: Java Interface Circle Square Triangle Rectangle Java Interface to Find Area

12. Interface Nesting in Java

13. Interface Nesting in Java Nesting Nested/Inner Interface is a procedure of declaring a new interface, either in an exciting Interface or inside a class

14. Interface V/S Class

15. Interface V/S Class Class Interface Keyword used: class Keyword used: interface Includes constructor Does not include constructor Stores only Method Signature Stores Method Definition Access Specifiers Needed No Access Specifiers Includes Data Members No Data Members Interface Class Includes Static Members No Static Members

16. Advantages of Interface

17. Advantages of Interface • Using Interfaces has increased the simplicity in programming. Some of the advantages are: • Complete Abstraction is achieved with no ambiguity • Loose Coupling between the Data and Methods • Resolves the Diamond Problem • Resolves the complexities in defining dependencies

18. Disadvantages of Interface

19. Disadvantages of Interface • Using Interfaces has some Disadvantages too: • Interface in real-world projects is used either extensively or not at all. • The Use of Interface can reduce the execution speed.