Modern Java: Mastering Features from Java 8 to Java 25

"Master Java 8 to Java 25: Functional Programming, Records, Sealed Classes, Pattern Matching, and more through hands-on.

[ Major Update : Complete Course updated on Oct 2025 ]

Learn the new Java 8, Java ll, Java 17, Java 21, Java 25 Features by coding it,This is a pure coding course and you will get a complete understanding of all the Java 8, Java ll, Java 17, Java 21,  Java 25 features by coding it

Why Should I take this course ?

• This course will help the Java developers to build their knowledge on the new Java 8 features

• All the new features such as Lambdas, Streams , Optionals, Functional Interfaces and Parallel Programming will be explained via code

• This course will give you the confidence on implementing new Java 8 features in real Java projects

• By the end of this course you will have a complete understanding of new Java 8 functional features

Course Overview :

Section 1 - Getting Started:

• This section explains about what will be covered in this course

Section 2 - Why Java-8 ?:

• This section covers Why Java 8 is important?

• This section explains about difference between Imperative Programming and Declarative Programming

Section 3 - WorkSpace Setup - Mac/Windows:

• This section covers the installation of Java and IntelliJ in Mac and Windows

Section 4: Introduction to Lambda

• This section covers the Why Lambda is needed , Lambdas Syntax and How to implement Lambdas ?

• Implement the Runnable interface using Lambdas

• Implement the Comparator interface using Lambdas

Section 5: Lambdas and Functional Interfaces

• This section covers the new Functional Interfaces that got introduced as part of Java 8

  • Consumer Functional Interface

  • Predicate Functional Interface

  • Function Functional Interface

  • Supplier Functional Interface

Section 6 : Constructor and Method References

• This section covers the new Method Reference and the Constructor Reference

  • How Method Reference simplifies the code

  • How to use Method reference along with Lambdas

  • How to use Constructor Reference to create new objects

Section 7 : Lambdas and Local variables ( Effectively Final )

• This section covers the local variable and how it should used in Lambdas

• Definition of Effectively Final scope of a variable

Section 8 : Streams API

• This section covers the Streams API which is one of the important feature that got introduced as part of Java8

• How the Stream API Works Internally ?

• How Collections are different from Streams ?

• How to debug a Stream ?

Section 9 : Streams API Operations

• This section covers different Streams API operations that can be used in Streams to achieve an objective

• Streams Operations such as :

  • map()

  • flatMap()

  • distinct()

  • count()

  • filter()

  • reducer()

  • Map, Filter and Reduce pattern

  • max()

  • min()

  • limit()

  • skip()

  • allMatch(), anyMatch() and noneMatch()

  • findAny() and findFirst()

• Explanation of Stream operations that are Short Circuit operations

Section 10 : Streams API - Factory Methods

• This section covers different Streams API factory method that can be used to create Streams

Section 11: Numeric Streams

• This section covers the Introduction to Numeric Streams which can be used to perform some numeric related operations

Section 12: Terminal Operations Streams

• This section covers different way to collect the data from the Streams Pipeline

• Terminal Operations such as :

  • joining()

  • counting()

  • mapping()

  • max(), min()

  • sum()

  • average()

  • groupingBy()

  • partitioningBy()

Section 13: Streams API - Parallel Processing

• This section covers how to perform the Parallel processing using Streams

• How Parallel Programming makes use of the processors in your machine to perform concurrency operations?

• How Parallel Programming works internally ?

• How to check the performance between the sequential and parallel programming ?

• Scenarios when not to use parallel programming

Section 14: Optional

• This section covers What is Optional and the benefits of Optional

• How Optional can help you avoid Null Pointer exception

• Exploring the different operations that are part of Optional such as :

  • empty()

  • ofNullable()

  • of()

  • orElse()

  • orElseGet()

  • orElseThrow()

  • isPresent()

  • ifPresent()

  • map()

  • flatMap()

  • filter()

Section 12: Streams API - Parallel Processing

• This section covers how to perform the Parallel processing using Streams

• How Parallel Programming makes use of the processors in your machine to perform concurrency operations?

• How Parallel Programming works internally ?

• How to check the performance between the sequential and parallel programming ?

• Scenarios when not to use parallel programming

Section 13: Optional

• This section covers What is Optional and the benefits of Optional

• How Optional can help you avoid Null Pointer exception

• Exploring the different operations that are part of Optional such as :

  • empty()

  • ofNullable()

  • of()

  • orElse()

  • orElseGet()

  • orElseThrow()

  • isPresent()

  • ifPresent()

  • map()

  • flatMap()

  • filter()

Section 14: New Date/Time Libraries

• This section covers new Date/Time Libraries such as LocalDate, LocalTime, LocalDateTime

• How to find the difference between the LocalDate, LocalTime and LocalDateTime using Period, Duration

• How to represent the time in the Machine Readable Format using Instant

• How to use the TimeZone using the ZonedDateTime

• How to Format the Date using the DateTimeFormatter

Section 15: Local Variable Type Inference (LVTI) using var

• In this section, we will code and learn about the LVTI feauture to simply local variable declaration using type inference.

Section 16: Text Blocks

• In this section, we will code and learn about the TextBlocks which enhances the power of String in Java.

Section 17: Enhanced Switch

• In this section, we will code and learn about the new Switch which is an expression.

  • Switch - as an Expression

  • Multiline switch expression using "yield"

  • Enhanced Switch are exhaustive

Section 18 : Records

• In this section, we will code and explore the record classes concept in Modern Java.

  • Records Classes

  • Custom Constructors and Validations in Record Classes

  • Object Equality in Record Clases

Section 19  : Pattern Matching

• In this section, we will code and learn about pattern matching.

  • Introduction to Pattern Matching

  • Record Patterns - Pattern Matching on Records

  • Guarded Patterns

Section 20 : ChekoutService Application [ Real Time Usecase]

• In this section, we will implement a realtime application using all the modern java concepts that we have learned so far.

Section 21 : Simple Web Server

• In this section, I will give you a demonstration of jwebserver and how it serves the files and folders as resources.

Section 22 : New Http Client

• In this section, we will code and explore the new HTTP Client that has support for HTTP2/Websockets.

  • New HttpClient - GET Request to retrieve movie by ID

  • JUnit test for the HTTP Client

  • Build HTTPClient in Asynchronous mode

  • Build HTTP Client - GET Request to Retrieve AllMovies

Section 23 : Java Platform Module System (JPMS)

• In this section, we will code and learn about how to build java application using JPMS or modules.

  • Introduction to JPMSBuild a Java app using JPMS

  • Working with Multiple Modules

  • Working with Multiple Modules - Transitively

  • Unnamed Modules and Automatic Modules

  
  

By the end of this course you will have a complete understanding of all the Java 8, Java ll, Java 17, Java 21  features and implement it in real Java projects