Functional Interface in Java Explained with Demonstration | Java 8 Features

Java 8 Features - Functional Interface in Java is very useful feature of Java 8, specifically it is an extremely important one for Lambda expressions. In this session we will learn how to create functional interface in Java. What is functional interface in Java. This is another important java interview question. We will also learn the constraints of functional interface in java and in built java functional interfaces such as Runnable , Callable etc. Important annotation is @FunctionalInterface
Some key point -
1. It's a Java 8 Feature
2. Exactly ONE Abstract method in an Interface
3. Single Abstract Method Interface (SAM)
4. @FunctionalInterface java annotation is used
This learning will be very useful for Java developers.

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Chapters
00:00 Welcome Note
00:31 Introduction of Java Functional Interface
00:46 Key Points of Java Functional Interface
01:18 @FunctionalInterface Java Annotation
04:06 Java Functional Interface Demonstration / Example
07:53 Java in built Functional Interface - Runnable , Callable , etc
09:21 Summary / Recap of Java Functional Interfaces
10:02 Thank You Note

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[ThinkConstructive]

Java Functional Interface is a very important Java interview question. Functional interfaces in java were introduced in Java 8 and a must have feature for using Lambda Expressions. In this course, functional interfaces are explained with examples / demonstration and also some in built java functional interfaces are also demonstrated.
Please watch the complete session to fully understand the feature and try all the demonstration with the video. That will be very helpful.
Enjoy learning the Java 8 features 😊
Subscribe and remain connected with Think Constructive.
Cheers,
Esha

[RahulSingh-sftp]

I have never seen such a excellent tutorial video on Functional Interface, Lambda expression, default and abstract methods. Thank you so much mam for helping us alot to understand the important topics of Java in such a easiest manner🙏

[unknowninformation]

How to call default methods, which are mentioning inside functional interface?