Modern Java: Mastering Features from Java 8 to Java 21 | Udemy

[ Major Update : Complete Course updated on December 2024 ]

Learn the new Java 8, Java ll, Java 17, Java 21 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 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