# dunwu/javacore

☕ JavaCore 是对 Java 核心技术的经验总结。

Repository: https://github.com/dunwu/javacore
Canonical: https://ross.abutalabs.com/products/javacore
Homepage: https://dunwu.github.io/javacore/
Language: Java
License: CC-BY-SA-4.0
License Family: other
Topics: java, jdk, jre, javacore, io, nio, concurrent, jvm
Last push: 2026-01-06T14:51:30+00:00

## Health v2 (maintenance only)
Score: 60/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 61, release rhythm 35, longevity 100
- inputs: {"age_days": 3302, "days_push": 239, "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 3321, forks 545 (observed 2026-08-28T04:07:56.282685+00:00)

## What it is
JavaCore is a Chinese-language tutorial collection summarizing Java core technologies, published as an ebook on GitHub Pages. It covers Java fundamentals, collections, IO/NIO, concurrency, JVM, and interview preparation.

## Use cases
- learn java core concepts
- prepare for java interviews
- understand java concurrency and jvm internals
- study java io and nio
- reference for java collections and generics
- java tutorial in chinese

## When to choose
- you want a structured, free Java tutorial or interview refresher
- you prefer reading docs as an online ebook
- you read Chinese and want curated Java notes

## When to avoid
- you need runnable production code or a library dependency
- you only read English
- you need official, version-specific JDK documentation

## Facets
- artifact type: learning-resource
- maturity: active
- function: documentation, developer-tools
- domain: programming-languages, tutorials, education
- platform: jvm
- tags: java, jvm, concurrency, nio, interview-prep, ebook, chinese-language

## Member repositories
- dunwu/javacore (main) score 60

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:07:56.282685+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 2026-08-29T18:41:50.302245+00:00, confidence not recorded.
  - readme: https://github.com/dunwu/javacore (fetched 2026-08-28T04:07:56.282685+00:00, sha ae1824111cf9)
  - homepage: https://dunwu.github.io/javacore/ (fetched 2026-08-29T09:34:49.991722+00:00, sha 8e3331f7cc34)
- Data as of 2026-08-30T08:39:29.467469+00:00.