# ctongfei/progressbar

Terminal-based progress bar for Java / JVM

Repository: https://github.com/ctongfei/progressbar
Canonical: https://ross.abutalabs.com/products/ctongfei-progressbar
Homepage: http://tongfei.me/progressbar/
Language: Java
License: MIT
License Family: permissive
Topics: progressbar, jvm, terminal, console, cli
Last push: 2026-03-01T00:42:18+00:00

## Health v2 (maintenance only)
Score: 63/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 69, release rhythm 34, longevity 100
- inputs: {"age_days": 4223, "days_push": 186, "days_rel": 230, "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 1174, forks 111 (observed 2026-08-28T04:03:52.022297+00:00)

## What it is
A console-based progress bar library for the JVM with minimal runtime overhead, supporting declarative wrapping of collections/streams and imperative try-with-resources usage. It supports multiple concurrent bars, custom styles, ETA display, and JPMS modules.

## Use cases
- show a progress bar for a long-running loop in Java
- track progress of file or stream processing on the JVM
- display multiple progress bars for parallel jobs
- wrap a collection or InputStream with automatic progress tracking
- add ETA and extra messages to console progress output

## When to choose
- you need a lightweight, low-overhead progress indicator in Java/Kotlin/Scala console apps
- you want declarative wrapping of collections or streams with zero boilerplate
- you need multiple simultaneous progress bars for parallel tasks

## When to avoid
- you need GUI or web-based progress reporting
- your output is not an ANSI-capable terminal
- you need rich TUI layouts beyond simple progress bars

## Facets
- artifact type: library
- maturity: active
- function: developer-tools, cli
- domain: developer-tools, cross-platform
- platform: jvm, cli, cross-platform
- tags: progress-bar, console-ui, terminal-output, java-library, kotlin-friendly, command-line

## Member repositories
- ctongfei/progressbar (main) score 63

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:03:52.022297+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 2026-08-30T06:28:17.534356+00:00, confidence not recorded.
  - readme: https://github.com/ctongfei/progressbar (fetched 2026-08-28T04:03:52.022297+00:00, sha 6ad392e14382)
  - homepage: http://tongfei.me/progressbar/ (fetched 2026-08-29T12:33:20.161448+00:00, sha 1ced1a505745)
  - site_page: http://tongfei.me/progressbar/changelog (fetched 2026-08-29T12:33:20.171415+00:00, sha 656f7b95054d)
- Data as of 2026-08-30T08:39:29.467469+00:00.