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Java Challenges

Learn Java for free by writing real code, graded by hidden tests.

• Java
• 120 lessons
• ~24 hours
• Free

Learn Java for free on Libre Academy with the Java Challenges challenge pack: 120 interactive lessons you complete by writing real code in a built-in editor, graded instantly by hidden tests. No paywall, no sign-up. It's part of the free, open-source desktop app for macOS, Windows and Linux.

What you get

• Hands-on lessons with a real editor and instant, test-graded feedback.
• Free and open source, with no account required to start.
• Works offline in the free desktop app for macOS, Windows and Linux.
• Java desktop app (native toolchain).

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Helpful reading

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