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.
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What we have learnt
- Functional programming treats functions as first-class citizens.
- Immutability and pure functions are key principles of functional programming.
- Java 8 introduced lambda expressions and the Streams API to support functional programming.
Key Concepts
- -- Functional Programming
- A programming paradigm where functions are treated as first-class citizens, focusing on immutable data and avoiding side effects.
- -- Lambda Expressions
- A concise way to represent a functional interface in Java, enabling clearer and more succinct code.
- -- Functional Interfaces
- Interfaces that contain exactly one abstract method, allowing them to be used with lambda expressions.
- -- Stream API
- A feature introduced in Java 8 for processing sequences of elements in a functional style.
- -- Optional Class
- A container object that may or may not contain a non-null value, used to prevent NullPointerExceptions.
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