Java constraint-solver

Open-source Java projects categorized as constraint-solver
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Solver Constraint Satisfaction Problem Solver Java constraint-programming Constraints
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Top 3 Java constraint-solver Projects

constraint-solver

  1. Timefold Solver

    The open source Solver AI for Java and Kotlin to optimize scheduling and routing. Solve the vehicle routing problem, employee rostering, task assignment, maintenance scheduling and other planning problems.

    Project mention: Last fifty years of integer linear programming: Recent practical advances | news.ycombinator.com | 2025-06-17

  2. Stream

    Stream - Scalable APIs for Chat, Feeds, Moderation, & Video. Stream helps developers build engaging apps that scale to millions with performant and flexible Chat, Feeds, Moderation, and Video APIs and SDKs powered by a global edge network and enterprise-grade infrastructure.

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  3. Choco

    An open-source Java library for Constraint Programming

  4. OptaPlanner

    Java Constraint Solver to solve vehicle routing, employee rostering, task assignment, maintenance scheduling, conference scheduling and other planning problems.

NOTE: The open source projects on this list are ordered by number of github stars. The number of mentions indicates repo mentiontions in the last 12 Months or since we started tracking (Dec 2020).

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Java constraint-solver related posts

  • Last fifty years of integer linear programming: Recent practical advances

    1 project | news.ycombinator.com | 17 Jun 2025

  • How I build a university timetable generator

    1 project | dev.to | 29 Apr 2025

  • I built an AI company to save my open source project

    1 project | news.ycombinator.com | 13 Feb 2025

  • The Design and Implementation of the CPython Virtual Machine

    1 project | news.ycombinator.com | 1 Sep 2024

  • Free Staff Rostering Software

    1 project | /r/software | 6 Dec 2023

  • OG OptaPlanner team continues on Timefoldfold Solver 1.1 is out now

    1 project | news.ycombinator.com | 11 Sep 2023

  • Searching for Shift-planning web-based solution

    1 project | /r/selfhosted | 24 Jun 2023
  • A note from our sponsor - Stream
    getstream.io | 15 Jul 2025
    Stream helps developers build engaging apps that scale to millions with performant and flexible Chat, Feeds, Moderation, and Video APIs and SDKs powered by a global edge network and enterprise-grade infrastructure. Learn more →

Index

What are some of the best open-source constraint-solver projects in Java? This list will help you:

# Project Stars
1 Timefold Solver 1,393
2 Choco 724
3 OptaPlanner 403

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Stream helps developers build engaging apps that scale to millions with performant and flexible Chat, Feeds, Moderation, and Video APIs and SDKs powered by a global edge network and enterprise-grade infrastructure.
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