# hellokaton/30-seconds-of-java8

☕ 30 seconds to collect useful Java 8 snippet.

Repository: https://github.com/hellokaton/30-seconds-of-java8
Canonical: https://ross.abutalabs.com/products/30-seconds-of-java8
Language: Java
License: CC0-1.0
License Family: permissive
Topics: java8, code-snippets, java8-study
Last push: 2024-12-03T02:50:31+00:00

## Health v2 (maintenance only)
Score: 32/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 3137, "days_push": 638, "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 2400, forks 425 (observed 2026-08-28T04:06:43.785722+00:00)

## What it is
A curated collection of useful Java 8 code snippets that can each be read in 30 seconds or less, covering arrays, math, strings, and more. It is a learning reference translated from little-java-functions, designed for quick lookup while studying Java 8 features like streams and lambdas.

## Use cases
- learn java 8 streams and lambdas quickly
- find a java snippet to chunk or flatten an array
- look up how to capitalize or reverse a string in java
- study common java 8 utility functions
- quick reference for java 8 code examples

## When to choose
- you are learning Java 8 and want bite-sized examples
- you need a quick copy-paste snippet for common array, string, or math operations
- you want a free, permissively licensed (CC0) reference

## When to avoid
- you need a production utility library with tested, maintained APIs
- you are working with Java versions beyond 8 features
- you need comprehensive documentation rather than snippets

## Facets
- artifact type: learning-resource
- maturity: maintenance
- function: developer-tools, documentation
- domain: programming-languages, tutorials, developer-tools, awesome-lists
- platform: jvm, cross-platform
- tags: java8, code-snippets, cheatsheet, streams, lambdas

## Member repositories
- hellokaton/30-seconds-of-java8 (main) score 32

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:06:43.785722+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 2026-08-30T02:34:16.600101+00:00, confidence not recorded.
  - readme: https://github.com/hellokaton/30-seconds-of-java8 (fetched 2026-08-28T04:06:43.785722+00:00, sha cc3b4e94749d)
- Data as of 2026-08-30T08:39:29.467469+00:00.