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74 stars written in Java
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🏗 Build container images for your Java applications.

Java 14,368 1,471 Updated Feb 18, 2026

Open-Source Web UI for Apache Kafka Management

Java 12,000 1,380 Updated Jul 26, 2024

Testcontainers is a Java library that supports JUnit tests, providing lightweight, throwaway instances of common databases, Selenium web browsers, or anything else that can run in a Docker container.

Java 8,618 1,821 Updated Apr 2, 2026

An annotation processor for generating type-safe bean mappers

Java 7,639 1,013 Updated Mar 27, 2026

vʌvr (formerly called Javaslang) is a non-commercial, non-profit object-functional library that runs with Java 8+. It aims to reduce the lines of code and increase code quality.

Java 6,126 659 Updated Apr 1, 2026

Reformats Java source code to comply with Google Java Style.

Java 6,099 919 Updated Apr 3, 2026

Keep your code spotless

Java 5,396 513 Updated Apr 2, 2026

An application observability facade for the most popular observability tools. Think SLF4J, but for observability.

Java 4,831 1,083 Updated Apr 3, 2026

Fault tolerance and resilience patterns for the JVM

Java 4,308 309 Updated Dec 28, 2025

A tool to help eliminate NullPointerExceptions (NPEs) in your Java code with low build-time overhead

Java 4,027 330 Updated Apr 3, 2026

Awaitility is a small Java DSL for synchronizing asynchronous operations

Java 4,004 258 Updated Feb 26, 2025

Official Java client library for kubernetes

Java 3,953 2,091 Updated Apr 3, 2026

Micro second messaging that stores everything to disk

Java 3,712 560 Updated Mar 30, 2026

A fast, lightweight and more productive microservices framework

Java 3,676 629 Updated Apr 3, 2026

Apache Log4j is a versatile, feature-rich, efficient logging API and backend for Java.

Java 3,591 1,707 Updated Mar 29, 2026

Java annotation processor to create immutable objects and builders, for records too. Sweep boilerplate code under the rug!

Java 3,551 293 Updated Mar 22, 2026

Small set of tools for JVM troublshooting, monitoring and profiling.

Java 3,344 522 Updated Jan 26, 2024

MATURE: A set of Maven tools for dealing with Dockerfiles

Java 2,741 480 Updated Feb 1, 2022

Java rate limiting library based on token-bucket algorithm.

Java 2,731 316 Updated Mar 9, 2026

A High Dynamic Range (HDR) Histogram

Java 2,341 268 Updated Jun 27, 2024

Smithy is a protocol-agnostic interface definition language and set of tools for generating clients, servers, and documentation for any programming language.

Java 2,234 244 Updated Apr 3, 2026

An extensible Java library for HTTP request and response logging

Java 2,031 274 Updated Apr 2, 2026

Persistent cluster-friendly scheduler for Java

Java 1,535 239 Updated Mar 26, 2026

An artifact of fully-specified annotations to power static-analysis checks, beginning with nullness analysis.

Java 1,070 42 Updated Apr 3, 2026

A fast Java JSON schema validator that supports draft V4, V6, V7, V2019-09 and V2020-12

Java 1,038 340 Updated Mar 10, 2026

Lightweight Java State Machine

Java 932 190 Updated Jun 17, 2023

Record builder generator for Java records

Java 914 68 Updated Feb 16, 2026

Yet Another Validation for Java (A lambda based type safe validation framework)

Java 844 64 Updated Jan 26, 2026

tinylog is a lightweight logging framework for Java, Kotlin, Scala, and Android

Java 767 85 Updated Apr 1, 2026
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