Check out our courses: Java Spring Boot AI Live Course: Coupon: TELUSKO20 (20% Discount) AI Powered DevOps with AWS - Live Course :- Coupon: TELUSKO20 (20% Discount) Master Java Spring Development : Coupon: TELUSKO20 (20% Discount) For More Queries WhatsApp or Call on : +919008963671 website : Udemy Courses: Spring: Java:- Java Spring:- Java For Programmers:- Python : Git : Docker : Instagram : Linkedin : TELUSKO Android App : TELUSKO IOS App : Discord : In this lecture we are discussing types of interface: #1 types of interface 1) Normal interface 2)functional interface /SAM 3)Marker interface #2 i)Normal interface Normal interface contains two or more abstract method. It can have any number of static and default methods and also even public methods of Object classes. you can declare variable which are public static final by deault ii)Functional Interface: Functional Interface is an interface that has only pure one abstract method. It can have any number of static and default methods and also even public methods of Object classes e.g Runnable interface : It contains only run() method iii) Marker Interface: An interface that does not contain any methods, fields, Abstract Methods, and any Constants is Called a Marker interface. Also, if an interface is empty, then it is known as Marker Interface. The Serializable and the Cloneable interfaces are examples of Marker interfaces. Github repo : More Learning : Java :- Python :- Django :- JavaScript :- Node JS :- Rest Api :- Servlet :- Spring Framework :- Design Patterns in Java :- Docker :- Blockchain Tutorial :- Corda Tutorial:- Hyperledger Fabric :- NoSQL Tutorial :- Mysql Tutorial :- Data Structures using Java :- Git Tutorial :- Donation: PayPal Id : navinreddy20