# openjdk/jdk

JDK main-line development https://openjdk.org/projects/jdk

Repository: https://github.com/openjdk/jdk
Canonical: https://ross.abutalabs.com/products/jdk
Language: Java
License: GPL-2.0
License Family: copyleft
Topics: openjdk, java, jvm
Last push: 2026-08-26T23:48:54+00:00

## Health v2 (maintenance only)
Score: 77/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 35, longevity 100
- inputs: {"age_days": 2907, "days_push": 7, "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 23273, forks 6431 (observed 2026-08-28T04:11:34.605888+00:00)

## What it is
The main-line development repository for the OpenJDK, the open-source implementation of the Java Platform, Standard Edition. It contains the Java compiler, the HotSpot virtual machine, and the core class libraries that make up the JDK.

## Use cases
- build the Java Development Kit from source
- contribute to Java platform development
- test applications against the latest JDK main-line
- study JVM and Java compiler internals
- run Java programs on an open-source runtime

## When to choose
- you need the reference implementation of Java SE
- you want to contribute to or track upcoming Java releases
- you need to build or patch the JDK itself

## When to avoid
- you just need a stable certified JDK for production from a vendor
- you develop in a language other than Java
- you want a minimal JRE-only distribution

## Facets
- artifact type: library
- maturity: active
- function: compiler, interpreter, developer-tools, programming-language
- domain: programming-languages, compilers, developer-tools, performance
- platform: windows, cross-platform, jvm
- tags: java, jvm, openjdk, jdk, runtime, virtual-machine, linux, macos

## Member repositories
- openjdk/jdk (main) score 77

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:11:34.605888+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 2026-08-29T16:56:45.726922+00:00, confidence not recorded.
  - readme: https://github.com/openjdk/jdk (fetched 2026-08-28T04:11:34.605888+00:00, sha 50b0ca29cd76)
- Data as of 2026-08-30T08:39:29.467469+00:00.