# java8/Java8InAction

Repository: https://github.com/java8/Java8InAction
Canonical: https://ross.abutalabs.com/products/java8inaction
Language: Java
License: MIT
License Family: permissive
Last push: 2023-12-06T11:43:33+00:00

## Health v2 (maintenance only)
Score: 32/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 4692, "days_push": 1001, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 3173, forks 2234 (observed 2026-08-28T04:07:47.532094+00:00)

## What it is
Source code repository for the book 'Java 8 in Action', containing all examples and quizzes covering lambdas, streams, and functional-style programming in Java. It is organized by book chapter and built with Maven.

## Use cases
- learn java 8 lambdas and streams with runnable examples
- study functional programming in java
- find example code for CompletableFuture and Optional
- practice java 8 stream collection and parallel processing
- accompany the Java 8 in Action book with source code

## When to choose
- you are reading or studying the Java 8 in Action book
- you want hands-on examples of Java 8 features like lambdas, streams, and the new Date/Time API

## When to avoid
- you need a production library or framework to depend on
- you are looking for documentation on Java versions after 8
- you want a structured course rather than example code

## Facets
- artifact type: learning-resource
- maturity: maintenance
- function: developer-tools
- domain: programming-languages, tutorials, education
- platform: jvm, cross-platform
- tags: java-8, lambdas, streams, functional-programming, book-examples, completablefuture

## Member repositories
- java8/Java8InAction (main) score 32

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:07:47.532094+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T18:45:27.516352+00:00, confidence not recorded.
  - readme: https://github.com/java8/Java8InAction (fetched 2026-08-28T04:07:47.532094+00:00, sha 8fcb76eb745e)
- Data as of 2026-08-30T08:39:29.467469+00:00.