# bobbylight/RSyntaxTextArea

A syntax highlighting, code folding text editor for Java Swing applications.

Repository: https://github.com/bobbylight/RSyntaxTextArea
Canonical: https://ross.abutalabs.com/products/rsyntaxtextarea
Language: Java
License: BSD-3-Clause
License Family: permissive
Topics: code-editor, syntax-highlighting, java-swing-applications
Last push: 2026-08-24T18:15:06+00:00

## Health v2 (maintenance only)
Score: 94/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 83, longevity 100
- inputs: {"age_days": 4773, "days_push": 9, "days_rel": 38, "gap_med": 52.0, "n_releases_24m": 9}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1251, forks 269 (observed 2026-08-28T04:04:08.303334+00:00)

## What it is
RSyntaxTextArea is a customizable syntax highlighting text editor component for Java Swing applications, supporting 50+ languages, code folding, and search/replace. It is a drop-in JTextComponent subclass with add-on libraries for code completion and spell checking.

## Use cases
- add syntax highlighting to a Java Swing text editor
- build a code editor in Java with code folding
- embed a code editing component in a desktop Java application
- highlight 50+ programming languages in a Swing UI
- add search and replace to a Swing text component
- extend syntax highlighting to custom languages with JFlex

## When to choose
- you are building a Java Swing desktop application that needs code editing
- you want a mature, BSD-licensed syntax highlighting component on Maven Central
- you need code folding, completion, or spell checking add-ons in Swing

## When to avoid
- you are building a web-based editor (use CodeMirror or Monaco)
- your application is not Java/Swing
- you need a full standalone IDE rather than an embeddable component

## Facets
- artifact type: library
- maturity: stable
- function: editor, ui-components
- domain: developer-tools, text-editors, desktop-applications
- platform: jvm, cross-platform
- tags: syntax-highlighting, code-folding, swing, text-editor-component, code-completion, desktop

## Member repositories
- bobbylight/RSyntaxTextArea (main) score 94

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:04:08.303334+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 2026-08-30T05:07:38.189374+00:00, confidence not recorded.
  - readme: https://github.com/bobbylight/RSyntaxTextArea (fetched 2026-08-28T04:04:08.303334+00:00, sha 9be4383b86b1)
- Data as of 2026-08-30T08:39:29.467469+00:00.