# jfree/jfreechart

A 2D chart library for Java applications (JavaFX, Swing or server-side).

Repository: https://github.com/jfree/jfreechart
Canonical: https://ross.abutalabs.com/products/jfreechart
Homepage: http://www.jfree.org/jfreechart/
Language: Java
License: LGPL-2.1
License Family: copyleft
Topics: charts, java2d, swing, javafx, data-visualization
Last push: 2025-11-22T13:28:08+00:00

## Health v2 (maintenance only)
Score: 47/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 53, release rhythm 8, longevity 100
- inputs: {"age_days": 3866, "days_push": 284, "days_rel": 469, "gap_med": null, "n_releases_24m": 1}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1391, forks 671 (observed 2026-08-28T04:04:35.884787+00:00)

## What it is
JFreeChart is a comprehensive open-source 2D chart library for the Java platform, usable in Swing and JavaFX client applications or on the server side. It supports a wide range of chart types and exports to PNG, JPEG, SVG, PDF, and other formats.

## Use cases
- render charts in a Java Swing desktop application
- display charts in a JavaFX application
- generate chart images server-side for web reports
- export charts to SVG or PDF from Java
- plot time series and Sankey charts in Java

## When to choose
- you need mature, well-documented charting in a Java application
- you need LGPL licensing that permits use in proprietary software
- you need both client-side rendering and server-side image/vector export

## When to avoid
- you need interactive 3D charts (use Orson Charts instead)
- you are not on the Java/JVM platform
- you need JavaScript/browser-native charting

## Facets
- artifact type: library
- maturity: stable
- function: data-visualization, charts
- domain: data-visualization
- platform: jvm, cross-platform
- tags: java2d, swing, javafx, charting, svg-export, pdf-export, png-export, server-side, java, desktop

## Member repositories
- jfree/jfreechart (main) score 47

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:04:35.884787+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 2026-08-30T04:39:36.456941+00:00, confidence not recorded.
  - readme: https://github.com/jfree/jfreechart (fetched 2026-08-28T04:04:35.884787+00:00, sha 024424a2ce5c)
  - homepage: http://www.jfree.org/jfreechart/ (fetched 2026-08-29T11:54:39.303948+00:00, sha 3a01892e077e)
  - site_page: https://www.jfree.org/jfreechart/faq.html (fetched 2026-08-29T11:54:39.331584+00:00, sha 2483be6294a2)
  - site_page: http://www.jfree.org/jfreechart/faq.html (fetched 2026-08-29T11:54:39.333843+00:00, sha 12345d1c4abe)
- Data as of 2026-08-30T08:39:29.467469+00:00.