# CarpenterLee/JCFInternals

深入理解Java集合框架

Repository: https://github.com/CarpenterLee/JCFInternals
Canonical: https://ross.abutalabs.com/products/jcfinternals
License: NOASSERTION
License Family: other
Topics: jcf, java, java-collections-framework, stl-jcf
Last push: 2022-01-18T00:03:44+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": 3787, "days_push": 1689, "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 2223, forks 636 (observed 2026-08-28T04:06:27.817144+00:00)

## What it is
A series of in-depth tutorial articles analyzing the internals of the Java Collections Framework (JCF) from data structure and algorithm perspectives. It covers List, Set, Map, Stack, and Queue implementations like ArrayList, HashMap, and TreeMap with source code walkthroughs and illustrations.

## Use cases
- understand how HashMap works internally in Java
- learn the difference between ArrayList and LinkedList implementation
- study Java Collections Framework source code
- prepare for Java interview questions on collections
- understand TreeMap and TreeSet red-black tree implementation
- learn how PriorityQueue is implemented in Java

## When to choose
- you want a deep, source-code-level understanding of Java collection internals
- you are preparing for Java interviews covering data structures
- you prefer illustrated, article-based learning in Chinese

## When to avoid
- you need official API documentation or usage tutorials for Java collections
- you are a complete beginner to Java programming
- you need up-to-date coverage of newer JDK collection features

## Facets
- artifact type: learning-resource
- maturity: maintenance
- function: documentation, developer-tools
- domain: algorithms, tutorials, programming-languages
- platform: jvm
- tags: java-collections-framework, jcf, source-code-analysis, data-structures, chinese-language, educational, java, algorithms

## Member repositories
- CarpenterLee/JCFInternals (main) score 32

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:06:27.817144+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 2026-08-30T02:45:00.846709+00:00, confidence not recorded.
  - readme: https://github.com/CarpenterLee/JCFInternals (fetched 2026-08-28T04:06:27.817144+00:00, sha 83aa715be7e3)
- Data as of 2026-08-30T08:39:29.467469+00:00.