# google/guava

Google core libraries for Java

Repository: https://github.com/google/guava
Canonical: https://ross.abutalabs.com/products/guava
Homepage: https://guava.dev/
Language: Java
License: Apache-2.0
License Family: permissive
Topics: guava, java
Last push: 2026-08-26T21:47:14+00:00

## Health v2 (maintenance only)
Score: 99/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 98, longevity 100
- inputs: {"age_days": 4479, "days_push": 7, "days_rel": 15, "gap_med": 6, "n_releases_24m": 14}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 51891, forks 11194 (observed 2026-08-28T04:12:11.987129+00:00)

## What it is
Guava is Google's set of core Java libraries providing new collection types (multimap, multiset, immutable collections), a graph library, and utilities for concurrency, I/O, hashing, primitives, strings, caching, and math. It ships in JRE and Android flavors and is widely used across Google and the broader Java ecosystem.

## Use cases
- use immutable collections in java
- multimap and multiset data structures for java
- java concurrency utilities like listenablefuture
- graph data structure library for jvm
- string and hashing helper utilities in java
- in-memory caching in java
- common utility library to replace boilerplate in java projects

## When to choose
- you want battle-tested, widely adopted core utilities for any Java 8+ project
- you need collection types beyond the JDK such as multimaps, multisets, or immutable collections
- you are building an Android app and want the Android-compatible flavor

## When to avoid
- you only need a modern high-performance cache - prefer Caffeine, which Guava itself recommends
- you want event-driven pub-sub - Guava's EventBus is discouraged in favor of dependency injection and concurrency frameworks
- your project is minimal and you want to avoid a large dependency for a few utilities

## Facets
- artifact type: library
- maturity: stable
- function: caching, concurrency, serialization, math, developer-tools
- domain: developer-tools, cross-platform
- platform: jvm, cross-platform
- tags: collections, immutable-collections, graph-library, google, core-libraries, utilities, hashing, io-utilities, algorithms, android

## Member repositories
- google/guava (main) score 99

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:12:11.987129+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 2026-08-29T16:19:40.742803+00:00, confidence not recorded.
  - readme: https://github.com/google/guava (fetched 2026-08-28T04:12:11.987129+00:00, sha 60caa30ba67d)
  - homepage: https://guava.dev/ (fetched 2026-08-28T18:08:51.227031+00:00, sha e6600fb04c52)
  - site_page: https://guava.dev/releases/snapshot-jre/api/docs/ (fetched 2026-08-28T18:08:51.235981+00:00, sha b17616faade4)
  - site_page: https://guava.dev/releases/snapshot-jre/api/diffs/ (fetched 2026-08-28T18:08:51.237763+00:00, sha 1736d5c95072)
- Data as of 2026-08-30T08:39:29.467469+00:00.