Why Choose Kotlin Over Java For Android App Development?

With over 2.87 million apps listed on Google Play Store, Android is leading the app store market.

To develop Android apps, Java is the oldest go-to language amongst mobile app developers. However, this trend is shifting towards Kotlin that is also not new to the Android development community. But, what are the reasons that developers are switching to Kotlin from Java? In this article, I shall discuss various benefits of using Kotlin over Java.

  • Latest and Modern Features
As we all know Java was released 20 years back. That means it must be lacking somewhere to compete with the latest and advanced versions of Kotlin. Kotlin is newer to the market with lighter, state-of-the-art, concise, and expressive features that are throwing tough challenges for Java.

  • Interoperability with Java
Another reason for Kotlin’s popularity is its interoperability with java. That means you can achieve a custom Android app development with the co-existence of both Java and Kotlin code. Once such a project containing both Java and Kotlin is compiled, it is hard to differentiate between parts created with Java or Kotlin. This interoperability also eradicates the need of converting the entire project to get started with Kotlin.

  • Easy to Learn
Kotlin provides an easy learning curve for the developers. Its easy-to-understand structure can be effortlessly read and understood. Even for Java developers, Kotlin holds a gentle learning path. Most of Kotlin syntax is similar to Java so Java developers don’t find any difficulty using it for Android app development.

  • Code Conciseness
Kotlin is way more concise than Java that makes it more popular amongst developers. Having a concise code means they don’t have to write a number of code lines to address a problem, using lesser lines of code that could translate into reliable code with fewer UX crashes and bugs.

Some other benefits of having concise code are inclusive of easy to maintain, easy to read and alter (when required). So, what brings code conciseness to Kotlin?
-Properties, Data classes, Smart classes, and Type interface.


  • Clear and Safe Code
In addition to concise code, Kotlin offers clear and safe code. That means the chances of errors, system failures, crashes, and other common programming mistakes are fewer as compared to Java. Therefore, the Android developers are able to write stable and more powerful code in production.

  • Nullability
Kotlin has Null in its Type System that has been trouble with Java. If we talk about Android’s development environment, there is a common sight of representing the absence of certain values as “null”. To date, no other programming language than Kotlin has addressed this issue. It’s only Kotlin that has placed null rights in its type system.

  • Smart and Safe Compiler
Apart from other Android app development tools, having a good compiler is a developer’s dream. Kotlin’s team of developers has taken good care of this need, and it provides a smart and safe compiler. Some key features of Kotlin’s compiler are inclusive of the fail-fast principle (compile-time error detection instead of runtime), and reducing bugs and runtime errors in the code while performing multiple checks.

  • Productivity Boost
Kotlin has been built with developer productivity in mind, which is a key advantage of Kotlin over Java. This productivity boost is derived from its concise code, intuitive syntax, and its overall clear code design. The developers require lesser time to write, deploy, and maintain new code in Kotlin.

Final Thoughts:
Although Kotlin wins over the developer’s heart with its various competitive advantages of Java, the latter is not going anywhere. Java has served the industry for 20 years and it has still a long way to go. On the other hand, Kotlin is developer-friendly that keeps on improving with new and advanced features, so it is here to stay longer and phase out Java one or another day.

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