Kotlin from Java

Lesson in the Kotlin Roadmap · Stage 44: Kotlin/Java

Last updated 14 September 2026

What is Kotlin from Java?

Kotlin from Java refers to the process of using Kotlin code within existing Java projects. It allows developers to gradually introduce Kotlin into their codebase without requiring a complete rewrite. This interoperability enables leveraging the benefits of Kotlin, such as its concise syntax and null safety features, while still maintaining compatibility with existing Java libraries and frameworks.

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Kotlin from Java: common questions

Can I learn Kotlin from Java in Hindi?

This lesson is written in English. Once you sign in, open it in the interactive course and ask the AI tutor to explain Kotlin from Java in Hindi or Hinglish. The tutor answers from this lesson’s own text, so it stays on the syllabus, and it runs on your own Google, OpenAI or Anthropic key.

Is this Kotlin from Java tutorial for beginners?

It is lesson 131 of 153 in the free Kotlin roadmap, in stage 44, Kotlin/Java. If you are new to Kotlin, start from stage 1 and come back here in order; if you already know the earlier stages, this lesson stands on its own.