This intensive, hands-on course bridges the gap between Java and Kotlin, empowering experienced developers to write cleaner, more expressive code. Through a series of practical exercises directly in the IDE, you will move beyond basic syntax to adopt idiomatic Kotlin, leveraging its seamless interoperability to enhance existing Java projects or build robust new backend and Android applications.
Kotlin for Java Developers

Kotlin for Java Developers

Instructors: Svetlana Isakova
Access provided by The Adult Learning Department at DCPL
123,575 already enrolled
2,122 reviews
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What you'll learn
Refactor Java to Idiomatic Kotlin: Convert verbose Java patterns into concise Kotlin syntax while maintaining 100% JVM interoperability.
Eliminate NullPointerExceptions: Implement Kotlin’s type system to resolve nullability at compile-time rather than runtime.
Architect Functional Data Pipelines: Use lambdas, receivers, and Sequences to build high-efficiency, expressive logic.
Streamline Data Structures: Use data classes, properties, and generics to eliminate boilerplate and simplify Object-Oriented design.
Skills you'll gain
Tools you'll learn
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There are 5 modules in this course
Before diving into syntax, you must understand the interoperability architecture that allows Kotlin and Java to coexist. This module explores Kotlin’s design philosophy, its bytecode compatibility, and its primary advantages, demonstrating how to enhance productivity without compromising your existing JVM codebase. Outcome: Gain a clear understanding of why Kotlin has become the modern standard for JVM and Android development.
What's included
4 videos
It’s time to start coding. In this module, you will configure your IDE for optimal Kotlin development and begin writing your first programs. You’ll master core syntax – including variables, functions, and control flow – while comparing Kotlin constructs to their Java equivalents to quickly bridge the gap between the two languages. Outcome: Confidently navigate Kotlin’s core syntax and write foundational code.
What's included
18 videos1 app item3 plugins
Explore Kotlin’s most powerful defense: its type system. You will learn to eliminate NullPointerExceptions by effectively managing nullable and non-nullable types. Additionally, this module introduces functional programming patterns, including lambdas and higher-order functions, to make your code more expressive and concise. Outcome: Write safer, more powerful code using modern functional techniques and compile-time null safety.
What's included
19 videos1 reading2 app items4 plugins
Move beyond the basics to eliminate boilerplate code. In this module, you will explore properties, data classes, inheritance, and visibility modifiers. You will learn how Kotlin simplifies traditional Object-Oriented patterns and how to write idiomatic code that adheres to official conventions. Outcome: Structure clean, maintainable applications using Kotlin-specific best practices and simplified OOP structures.
What's included
19 videos2 app items4 plugins
To achieve true mastery, you must move beyond basic logic to leverage Kotlin’s most powerful abstractions. This module covers Sequences for memory-efficient data processing, Generics, and lambdas with receivers – the foundation of Kotlin’s Domain-Specific Languages (DSLs). Outcome: Build sophisticated, high-performance JVM applications using Kotlin’s most advanced architectural tools.
What's included
17 videos1 reading1 app item4 plugins
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Showing 3 of 2122
Reviewed on Dec 14, 2018
Clearly explained, easy to understand and nice programming tasks. I could complain something of documenting what to do in programming task, and also more smaller tasks would be useful
Reviewed on Jun 13, 2021
Good survey of Kotlin language features. Would have been nice if assignments focused more on Kotlin idioms. Perhaps that's a fundamental issue with using an automated grader?
Reviewed on May 2, 2020
The assignments don't have a detailed explanation. There should be more of code provided with fill the blanks kind of tasks. This would make it much easier and helpful as the assignments are tough.



