Java Koans
Java Koans — ported from https://github.com/matyb/java-koans for Libre.academy. Each exercise lives in its own lesson; fix the starter to make the tests pass.
- Java
- 41 lessons
- ~8 hours
- Free
- by Libre
Learn Java for free on Libre Academy with the Java Koans course: 41 interactive lessons you complete by writing real code in a built-in editor, graded instantly by hidden tests. No paywall, no sign-up — it runs in your browser and the free desktop app.
What you get
- Hands-on lessons with a real editor and instant, test-graded feedback.
- Free and open source — no account required to start.
- Runs in your browser, and offline in the free desktop app.
- Java desktop app (native toolchain).
What's inside
- Advanced
- Beginner
- Intermediate
- Java7
- Java8