Advanced Programming | 22. Lambda Expressions and Functional Interfaces by Abraham | Learn Smarter
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22. Lambda Expressions and Functional Interfaces

Lambda expressions and functional interfaces in Java greatly enhance the language's functional programming capabilities, allowing for concise and expressive code. These features facilitate the use of Streams, Collections, and multithreading, promoting improved code reusability and flexibility. Understanding the syntax, characteristics, and best practices surrounding lambda expressions equips developers with essential tools for modern Java programming.

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Sections

  • 22

    Lambda Expressions And Functional Interfaces

    This section introduces lambda expressions and functional interfaces in Java, highlighting their significance in functional programming.

    Learning Practice

  • 22.1

    Functional Programming In Java

    Java incorporates functional programming paradigms, allowing for concise, readable code through lambda expressions and functional interfaces.

    Learning Practice

  • 22.2

    Key Characteristics Of Lambda Expressions

    Lambda expressions enable concise code by allowing anonymous methods without explicit definitions.

    Learning Practice

  • 22.3

    Functional Interfaces

    Functional interfaces form the core of lambda expressions in Java, enabling concise and flexible code.

    Learning Practice

  • 22.4

    Built-In Functional Interfaces (Java.util.function)

    Java 8 introduced built-in functional interfaces that simplify functional programming.

    Learning Practice

  • 22.5

    Type Inference And Target Typing

    This section discusses how Java uses type inference to deduce parameter types of lambda expressions based on the context provided by functional interfaces.

    Learning Practice

  • 22.6

    Lambda Vs Anonymous Class

    This section compares lambda expressions and anonymous classes, highlighting their syntax, usage, and performance differences.

    Learning Practice

  • 22.7

    Scope And Access

    Lambda expressions can access effectively final variables but cannot modify local variables unless they are final.

    Learning Practice

  • 22.8

    Lambda Expressions In Collections Api

    This section discusses how lambda expressions can be efficiently used with collections in Java, highlighting operations like forEach, removeIf, and sort.

    Learning Practice

  • 22.9

    Lambda Expressions In Multithreading

    This section discusses how lambda expressions simplify thread creation in Java, providing a concise syntax for creating and executing threads.

    Learning Practice

  • 22.10

    Method References And Constructor References

    This section explains method references and constructor references in Java, showcasing how they provide a shorthand notation for lambda expressions.

    Learning Practice

  • 22.11

    Stream Api And Lambda Expressions

    Lambda expressions are integral to the Stream API, allowing functional-style data processing in Java.

    Learning Practice

  • 22.12

    Custom Functional Interface Example

    This section illustrates the creation and usage of a custom functional interface in Java.

    Learning Practice

  • 22.13

    Best Practices

    This section outlines best practices for using lambda expressions and functional interfaces in Java.

    Learning Practice

  • 22.14

    Limitations Of Lambda Expressions

    Lambda expressions in Java have limitations, particularly in handling exceptions and clarity.

    Learning Practice

References

Chapter_22_Lambd.pdf

Class Notes

Memorization

What we have learnt

  • Lambda expressions allow th...
  • Functional interfaces are i...
  • Java 8 introduced a collect...

Final Test

Revision Tests