Java 8 Features for Interviews | Default Methods, Lambda Expressions, Streams API & More

Java 8 Full Guide for Developers and Interviews

Java 8 is one of the most important releases in the history of Java. The introduction of Java 8 features like Lambda Expressions, Streams API, Functional Interfaces, Optional Class, Default Methods, Static Methods in Interfaces, and the new Java 8 Date and Time API completely transformed how modern Java applications are written.

In this Java 8 tutorial, you will learn the most important Java 8 features in one video with clear explanations and practical IntelliJ hands-on coding examples.
If you are preparing for Java 8 interview questions or want to strengthen your core Java concepts, this video will give you a strong conceptual understanding of the most widely used Java 8 features.

In this video, we cover the following Java 8 features step-by-step:

• Default Method in Interface
• Static Method in Interface
• Functional Interface
• Lambda Expressions
• Method Reference
• Streams API
• Optional Class
• Java 8 Date and Time API
• Metaspace

You will also understand why Java 8 introduced default methods in interfaces, why static methods in interfaces were added, how lambda expressions simplify Java code, the advantages of method reference, how the Java Streams API works, how Optional in Java helps prevent NullPointerException, the benefits of the Java 8 Date-Time API, and how Metaspace replaced PermGen in Java memory management.

This video works as a complete Java 8 overview where you get both theory and practical coding demonstrations. In upcoming videos, each Java 8 feature will be explained in much deeper detail with advanced examples and interview-focused discussions.

If you are preparing for Java developer interviews, Spring Boot interviews or backend developer roles, understanding Java 8 is essential because modern Java applications and frameworks heavily rely on Lambda Expressions, Streams API, Functional Interfaces, and Optional in Java.
This video will help you quickly understand the most important Java 8 features, concepts, and practical usage that every Java developer should know.

00:00 : Introduction
00:39 : Default Method in Interface
02:39 : Static Method in Interface
04:55 : Functional Interface
08:48 : Lambda Expressions
16:46 : Method Reference
21:39 : Streams API
24:01 : Optional Class
27:48 : New Date-Time API
29:52 : Metaspace

Java 8 Default Methods in Interface : https://www.youtube.com/watch?v=ORmhR1VaH0c

Java 8 Static Methods in Interface : youtube.com/watch?v=CIBUxhSq0Ewu0026t=97s

Java 8 Functional Interface | Lambda Expressions : https://www.youtube.com/watch?v=1BVgRnERFmk

Java 8 Functional Interface Tutorial | Predicate, Function, Consumer, Supplier : https://youtu.be/7CRZGBFfJHY?si=EFaYRPsqJVr44IzR

Method Reference vs Lambda in Java 8 | Static, Instance, Constructor | Interview Questions: https://youtu.be/We3R31cZy0U?si=oTXj-KdaKoZgR2Y0

Java 8 Optional Class Deep Dive | isPresent(), ifPresent(), orElse(), ofNullable() Explained :
https://www.youtube.com/watch?v=KL1PcMl9m8cu0026t=243s

Java 8 Date u0026 Time API | LocalDate, LocalTime, ZonedDateTime | Java 8 Interview Questions : https://www.youtube.com/watch?v=KcIzqPYM0Jgu0026t=11s

Java 8 Streams Explained for Interviews | Lazy Loading, Parallel Streams u0026 More :
https://www.youtube.com/watch?v=yob_Na39GaA

Top 30 Java 8 Stream API Interview Questions u0026 Answers | Parallel Streams, Collectors, Lazy Loading : https://www.youtube.com/watch?v=BXm6YGu-Feo

Java 8 Stream API Interview Questions | 20 Coding Problems Solved Live 🔥:
https://www.youtube.com/watch?v=cbRwk-usJFs

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