Advance Programming In Java | 17. Functional Programming in Java by Abraham | Learn Smarter
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17. Functional Programming in Java

Functional programming in Java introduces essential concepts that enhance code readability and maintainability. With features like lambda expressions, method references, and the Streams API, Java supports a more expressive programming style. Understanding these functional programming principles enables developers to write cleaner and more efficient code, facilitating parallel processing and better handling of data.

Sections

  • 1

    What Is Functional Programming?

    Functional programming is a declarative programming paradigm that emphasizes the use of functions as first-class citizens.

    Learning Practice

  • 1.1.1

    Key Principles

    This section outlines the core principles of Functional Programming and their significance in Java.

    Learning Practice

  • 1.2

    Functional Interfaces

    Functional interfaces in Java are interfaces with a single abstract method, playing a crucial role in functional programming.

    Learning Practice

  • 1.2.1

    Syntax

    This section discusses the syntax and key concepts of functional programming in Java, highlighting lambda expressions, functional interfaces, and method references.

    Learning Practice

  • 1.2.2

    Examples Of Predefined Functional Interfaces

    This section introduces predefined functional interfaces in Java, explaining their significance and how they can be used.

    Learning Practice

  • 1.3

    Lambda Expressions

    Lambda expressions in Java are a concise way to represent instances of functional interfaces, enabling cleaner and more expressive code.

    Learning Practice

  • 1.3.1

    Syntax

    This section introduces the key syntax and concepts of functional programming in Java.

    Learning Practice

  • 1.3.3

    With Parameters

    This section focuses on using functional programming techniques in Java, particularly emphasizing lambda expressions and built-in functional interfaces.

    Learning Practice

  • 1.4

    Method References

    Method references in Java provide a concise way to refer to methods or constructors, enhancing code readability.

    Learning Practice

  • 1.4.1

    Types Of Method References

    Method references in Java provide shorthand for method calls and enhance code readability.

    Learning Practice

  • 1.5

    Built-In Functional Interfaces In Java.util.function

    This section covers the built-in functional interfaces provided in Java's java.util.function package, exploring their purpose and usage through examples.

    Learning Practice

  • 1.5.1

    Interface Description

    This section introduces the concept of functional interfaces in Java, focusing on their structure, purpose, and predefined types.

    Learning Practice

  • 1.6

    Stream Api And Functional Operations

    The Stream API in Java allows for functional-style processing of collections, enabling developers to write more expressive code.

    Learning Practice

  • 1.6.1

    Stream Creation

    Stream creation in Java allows for the processing of collections in a functional style, enhancing code readability and maintainability.

    Learning Practice

  • 1.6.2

    Common Functional Operations

    This section explores the common functional operations provided by the Stream API in Java, focusing on how to process collections in a functional style.

    Learning Practice

  • 1.7

    Optional Class

    The Optional Class in Java is a container that may or may not have a non-null value, helping to avoid NullPointerExceptions.

    Learning Practice

  • 1.7.1

    Example

    This section introduces functional programming concepts in Java, emphasizing key principles like immutability, first-class functions, and pure functions.

    Learning Practice

  • 1.8

    Functional Programming Vs Object-Oriented Programming

    This section compares functional programming and object-oriented programming in Java, highlighting their differences and strengths.

    Learning Practice

  • 1.9

    Best Practices

    This section outlines best practices for effectively employing functional programming in Java.

    Learning Practice

  • 1.10

    Use Cases And Real-World Applications

    This section explains various real-world applications of functional programming in Java, highlighting its practical uses.

    Learning Practice

References

AJP ch17.pdf

Class Notes

Memorization

What we have learnt

  • Functional programming trea...
  • Immutability and pure funct...
  • Java 8 introduced lambda ex...

Final Test

Revision Tests