RxJava
Java MediumReactiveX/RxJava
48,467 stars
7,602 forks
7 open issues
Active Mar 2026
Beginner-Friendly Issues 7
Issues tagged for new contributors
Test-Failures PR welcome good first issue 4.x
Enhancement PR welcome 4.x
4.x: Rename all `rx4.` properties configuring the library into `rxjava4.`
#8081 · Mar 26, 2026
Cleanup PR welcome 4.x
4.x: Cleanup anyonymous inner class uses in unit tests
#8080 · Mar 26, 2026
Test Cleanup PR welcome 4.x
4.x: Convert JUnit 4 tests into JUnit 6 tests
#8079 · Mar 25, 2026
Test-Failures Test Cleanup Performance: throughput 4.x
4.x: Separate `TestHelper.race` uses so they can run `@Isolated`
#8075 · Mar 25, 2026
Test-Failures Test PR welcome 4.x
4.x: Javadoc self-check to use/expand upon `{@inheritDoc}`
#8054 · Mar 25, 2026
Documentation Cleanup PR welcome 4.x