# winterbe/java8-tutorial

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16,733 stars · 4,005 forks · Java · MIT

## Links

- GitHub: https://github.com/winterbe/java8-tutorial
- Homepage: http://winterbe.com
- awesome-repositories: https://awesome-repositories.com/repository/winterbe-java8-tutorial.md

## Description

This project is a comprehensive programming tutorial and technical guide focused on the Java 8 language specification. It provides educational resources for implementing functional programming patterns, utilizing modern language syntax, and adopting updated API standards.

The guide covers the transition to functional programming through the use of lambda expressions, method and constructor references, and functional interfaces. It also details the use of default interface methods to extend logic without breaking existing classes and the implementation of repeatable annotations.

Additional coverage includes the stream API for sequential and parallel element processing, the immutable date and time API for high-precision time management, and the use of optional containers for type-safe null handling. The materials also include instructions for advanced map data manipulation, including merging and conditional updates.

## Tags

### Education & Learning Resources

- [Java Tutorials](https://awesome-repositories.com/f/education-learning-resources/educational-resources/reference-and-media/tutorials-media-curated-lists/technical-tutorials/programming-languages/java-tutorials.md) — Serves as a comprehensive technical guide for learning the Java 8 language specification.
- [Language Specifications](https://awesome-repositories.com/f/education-learning-resources/language-specifications.md) — Provides educational resources detailing the technical specifications, behaviors, and type system nuances of Java 8.
- [Functional Programming Education](https://awesome-repositories.com/f/education-learning-resources/functional-programming-education.md) — Offers a comprehensive educational guide on implementing functional patterns in Java.

### Data & Databases

- [Stream Processing](https://awesome-repositories.com/f/data-databases/data-processing-pipelines/stream-processing-systems/stream-processing.md) — Guides the creation of processing pipelines using intermediate filters and terminal reductions.
- [Language Stream APIs](https://awesome-repositories.com/f/data-databases/data-processing-pipelines/stream-processing-systems/stream-processing/language-stream-apis.md) — Offers a technical reference for implementing sequential and parallel element processing using the Java Stream API.
- [Date and Time Libraries](https://awesome-repositories.com/f/data-databases/date-and-time-libraries.md) — Teaches high-precision time management using the immutable Java 8 time API.
- [Immutable Date Processing](https://awesome-repositories.com/f/data-databases/immutable-date-processing.md) — Details the use of immutable object systems for high-precision time and timezone calculations.
- [Optional Containers](https://awesome-repositories.com/f/data-databases/null-handling-strategies/optional-containers.md) — Provides instructions on using Optional containers for type-safe null handling.
- [Null Value Representations](https://awesome-repositories.com/f/data-databases/null-value-representations.md) — Details how to prevent crashes by wrapping potentially null values in Optional containers.
- [Stream Processing](https://awesome-repositories.com/f/data-databases/stream-processing.md) — Explains how to process element sequences using filters, maps, and reductions.
- [Key-Value Data Manipulation](https://awesome-repositories.com/f/data-databases/key-value-data-manipulation.md) — Demonstrates specialized methods for conditional putting and merging in Java Maps.
- [Map Data Structure Manipulation](https://awesome-repositories.com/f/data-databases/map-data-structure-manipulation.md) — Covers advanced Map manipulation including merging, computing values, and conditional updates. ([source](https://github.com/winterbe/java8-tutorial/blob/master/README.md))

### Programming Languages & Runtimes

- [Function Argument Passing](https://awesome-repositories.com/f/programming-languages-runtimes/function-argument-passing.md) — Demonstrates how to pass behavioral logic as arguments using lambda expressions.
- [Functional Interfaces](https://awesome-repositories.com/f/programming-languages-runtimes/functional-interfaces.md) — Provides guidance on defining functional interfaces to enable lambda-based behavioral passing. ([source](https://github.com/winterbe/java8-tutorial/blob/master/README.md))
- [Method References](https://awesome-repositories.com/f/programming-languages-runtimes/method-references.md) — Teaches the use of double colon syntax to pass existing methods or constructors as functional arguments.
- [Default Interface Methods](https://awesome-repositories.com/f/programming-languages-runtimes/default-interface-methods.md) — Explains how to use default methods to extend interface logic without breaking existing implementing classes. ([source](https://github.com/winterbe/java8-tutorial#readme))
- [Default Interface Methods](https://awesome-repositories.com/f/programming-languages-runtimes/extension-methods/default-interface-methods.md) — Provides guidance on implementing default interface methods to extend logic without breaking existing classes.
- [Method and Constructor References](https://awesome-repositories.com/f/programming-languages-runtimes/method-and-constructor-references.md) — Explains the use of double colon syntax to simplify lambda expressions using method and constructor references. ([source](https://github.com/winterbe/java8-tutorial#readme))

### Software Engineering & Architecture

- [Arrow Function Expressions](https://awesome-repositories.com/f/software-engineering-architecture/development-methodologies/engineering-best-practices/code-craftsmanship-standards/coding-standards/arrow-function-expressions.md) — Teaches the use of concise arrow-function syntax to pass behavior as arguments in Java 8. ([source](https://github.com/winterbe/java8-tutorial#readme))
- [Functional Programming](https://awesome-repositories.com/f/software-engineering-architecture/functional-programming.md) — Provides educational resources on functional programming patterns using lambdas and interfaces.
- [Functional Programming Interfaces](https://awesome-repositories.com/f/software-engineering-architecture/functional-programming-interfaces.md) — Explains the use of functional interfaces as target types for lambda expressions.
- [Optional Value Types](https://awesome-repositories.com/f/software-engineering-architecture/optional-value-types.md) — Implements type-safe containers for wrapping potentially null results to ensure explicit handling. ([source](https://github.com/winterbe/java8-tutorial#readme))

### Part of an Awesome List

- [Developer Tools](https://awesome-repositories.com/f/awesome-lists/devtools/developer-tools.md) — Educational guide for Java 8 features.