Hacktoberfest 2026: the issues maintainers tagged for October, open and beginner-friendly. Browse Hacktoberfest issues

uber/h3-java

Sign in to follow View on GitHub

Java bindings for H3, a hierarchical hexagonal geospatial indexing system

Is uber/h3-java beginner-friendly?

We have not seen enough recent pull requests from first-time contributors to uber/h3-java to say how often they are merged. 1 beginner-friendly issue is open now.

Stars
333
Forks
68
Open beginner issues
1
Indexed issues
21
Dominant language
Java
License
Apache-2.0
Last GitHub push
Aug 19, 2026
Latest indexed
Sep 19, 2026
Contributing guide
Code of conduct
Beginner labels
No beginner labels indexed
No merged PRs in 30d

How to contribute to uber/h3-java

  1. Read the contributing guide first: it says how the maintainers want changes proposed, tested and reviewed.
  2. Read its code of conduct: it covers issues and pull requests as well as chat.
  3. Your contributions will be published under the project's Apache-2.0 license.
  4. Pick the open beginner-friendly issue below and comment that you want to work on it before you start.
Beginner friendly Everything
Open All

Issues somebody may already be working on are listed last. List everything by date

  • Proguard rules for Android release builds
    Open
    • Is something wrong?

    Difficulty 2/5 1-3 hours Newbie friendliness 68/100

    uber/h3-java#215 ·

  • reverseDirectedEdge is not available in Java 4.4.0 API
    Open
    • Is something wrong?

    Difficulty 2/5 1-3 hours Newbie friendliness 55/100

    uber/h3-java#204 · 1 comment ·

  • Failing automatic build does not trigger Slack alert
    Open
    • Is something wrong?

    Difficulty 3/5 1-2 days Newbie friendliness 42/100

    uber/h3-java#195 ·

  • polygonToCells The operation failed but a more specific error is not available
    Open
    • Is something wrong?

    Difficulty 4/5 3-5 days Newbie friendliness 35/100

    uber/h3-java#161 ·

  • About Handling Error in cellsToMultiPolygon
    Open
    • Is something wrong?

    Difficulty 3/5 1-2 days Newbie friendliness 48/100

    uber/h3-java#158 · 2 comments · 1 reaction ·

  • polygonToCells fails on a rectangular polygon
    Open
    • Is something wrong?

    Difficulty 4/5 3-5 days Newbie friendliness 38/100

    uber/h3-java#138 ·

  • Add M1 CI step in Github Actions
    Open
    • Is something wrong?

    Difficulty 4/5 3-5 days Newbie friendliness 38/100

    uber/h3-java#137 ·

  • CCLA Contact
    Open
    • Is something wrong?

    Difficulty 1/5 Under an hour Newbie friendliness 10/100

    uber/h3-java#136 ·

  • How to generate the jar package with all the linux native objs ?
    Open
    • Is something wrong?

    Difficulty 4/5 3-5 days Newbie friendliness 30/100

    uber/h3-java#134 ·

  • Compact Cells Failing on Certain Large Polygons
    Open
    • Is something wrong?

    Difficulty 4/5 3-5 days Newbie friendliness 28/100

    uber/h3-java#131 · 1 comment ·

  • linux-x86 fails to cross compile on M1 Mac
    May be free again Open
    • Is something wrong?

    uber/h3-java#123 · 1 assignee ·

  • Performance of a non-throwing API
    Open
    • Is something wrong?

    Difficulty 5/5 Over a week Newbie friendliness 25/100

    uber/h3-java#107 ·

  • Export to GeoJson
    Open
    • Is something wrong?

    Difficulty 4/5 3-5 days Newbie friendliness 25/100

    uber/h3-java#78 ·

  • H3Core.nonZeroLongArrayToList takes too much memory
    Open
    • Is something wrong?

    Difficulty 3/5 1-2 days Newbie friendliness 45/100

    uber/h3-java#68 · 3 comments · 1 reaction ·

  • h3 index converted to Geocoordinates: how to export to geojson
    Open
    • Is something wrong?

    Difficulty 4/5 3-5 days Newbie friendliness 25/100

    uber/h3-java#66 · 4 comments ·

  • H3 Polyfill skipping areas near the boundary
    Open
    • Is something wrong?

    Difficulty 4/5 3-5 days Newbie friendliness 25/100

    uber/h3-java#41 · 5 comments ·

  • [Feature Req] Polyfill for multi level inclusion/exclusion
    Open
    • Is something wrong?

    Difficulty 5/5 Over a week Newbie friendliness 25/100

    uber/h3-java#35 · 1 comment ·

  • JVM Crashing in Dockerized Alpine Environment
    Open
    • Is something wrong?

    Difficulty 4/5 3-5 days Newbie friendliness 35/100

    uber/h3-java#25 · 14 comments ·

  • JVM crash on large polyfills
    Open
    • Is something wrong?

    Difficulty 4/5 3-5 days Newbie friendliness 25/100

    uber/h3-java#21 · 11 comments ·

  • OOM handling in C
    Open
    • Is something wrong?

    Difficulty 5/5 Over a week Newbie friendliness 25/100

    uber/h3-java#10 ·

  • Support renaming NativeMethods and H3_EXPORT
    Open
    • Is something wrong?

    Difficulty 5/5 Over a week Newbie friendliness 20/100

    uber/h3-java#2 · 1 comment ·

Get new issues in your inbox

A short digest of beginner-friendly GitHub issues.