Kotlin
Google's officially supported modern programming language for Android app development with concise syntax and full Java interoperability
Kotlin is a statically-typed programming language officially endorsed by Google as the preferred language for Android development since 2019. Created by JetBrains, Kotlin addresses many of Java’s limitations while maintaining 100% interoperability with existing Java code and libraries. Its concise syntax reduces boilerplate code by up to 40%, while null safety features eliminate the notorious NullPointerException that plagues Java applications.
The language brings modern programming features to Android development, including extension functions, coroutines for asynchronous programming, data classes, and smart casting. Kotlin’s type inference and expressive syntax make code more readable and maintainable, while its functional programming capabilities enable developers to write cleaner, more testable code. Google’s commitment to Kotlin is evident in Android Jetpack libraries and Jetpack Compose, both designed with Kotlin-first APIs.
For Android developers, Kotlin represents the evolution of mobile app development on the platform. New Android projects default to Kotlin in Android Studio, and Google’s documentation increasingly prioritizes Kotlin examples. While Java remains supported, Kotlin’s safety features, modern syntax, and seamless integration with Android frameworks make it the clear choice for contemporary Android development.