# kangjianwei/LearningJDK

JDK源码阅读笔记

Repository: https://github.com/kangjianwei/LearningJDK
Canonical: https://ross.abutalabs.com/products/learningjdk
Language: Java
License Family: other
Topics: java, jdk, jdk-oracle, openjdk, source-code, study-notes
Last push: 2022-03-28T15:23:35+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": 2879, "days_push": 1619, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases, no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1554, forks 660 (observed 2026-08-28T04:05:02.944853+00:00)

## What it is
A repository of annotated JDK (Oracle/OpenJDK 11) source code with the author's reading notes written directly as comments in the source files. It includes branches for annotated source per JDK version, runnable test code, and curated reading lists.

## Use cases
- understand how JDK internals like collections and concurrency utilities are implemented
- study annotated Java standard library source code with explanations
- prepare for Java interviews covering JDK source questions
- run test snippets that demonstrate JDK class behavior
- browse JDK source with Chinese-language reading notes in IntelliJ IDEA

## When to choose
- you want human-written commentary embedded in JDK source while reading
- you prefer learning by reading annotated code plus runnable test examples
- you are studying JDK 11 internals specifically

## When to avoid
- you need to compile or build the full JDK from source
- you need up-to-date notes for the latest JDK releases
- you want an official or English-language reference rather than personal study notes

## Facets
- artifact type: learning-resource
- maturity: maintenance
- function: documentation, developer-tools
- domain: programming-languages, tutorials, developer-tools
- platform: jvm, cross-platform
- tags: jdk-source-code, study-notes, java, openjdk, annotated-source, intellij-idea

## Member repositories
- kangjianwei/LearningJDK (main) score 32

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:05:02.944853+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 2026-08-30T04:30:05.758580+00:00, confidence not recorded.
  - readme: https://github.com/kangjianwei/LearningJDK (fetched 2026-08-28T04:05:02.944853+00:00, sha 3f7a6a742f33)
- Data as of 2026-08-30T08:39:29.467469+00:00.