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Java

Beginner to Advanced

OOP, Collections, Streams, JVM

6Lessons·6Chapters
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SetupBasicsOOPCollections FunctionalJVM
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Java Learning FAQ

Can I learn Java for free?

Yes. All CodeMaster Java lessons are completely free, with no ads. Sign up to access the full content.

Can beginners follow the Java course?

Yes. Every lesson follows concept → code example → interactive demo → quiz, so you can follow along with no prior knowledge.

How long does it take to learn Java?

Each lesson is about 30-60 minutes on average. At 1-2 lessons a day, you can finish the whole category in about 1-2 months.

Can the AI mock interview be based on Java too?

Yes. CodeMaster's 4-turn AI mock interview covers algorithms, system design, CS knowledge, and vector DBs, and gives feedback on real interview questions including Java.

Free Java course — 6 lessons | CodeMaster