Kotlin vs Java in 2024: Why Developers Still Haven't Chosen a Winner?

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The Kotlin vs Java Debate: Developers Can't Reach a Consensus

2024 has been a turning point for the JVM ecosystem: Kotlin is confidently pushing Java aside in the enterprise segment, but the community remains divided. According to a JetBrains survey from October 2024, 62% of Android developers use Kotlin as their primary language, yet only 28% of backend engineers are ready to completely abandon Java. "Kotlin is an evolution, not a revolution," comments Spotify lead engineer Anna Morozova. "We migrated 70% of our microservices to Kotlin, but Java remains for legacy code and latency-critical tasks."

The key arguments for Kotlin supporters are null-safety and coroutines. In 2024, 89% of developers surveyed in the State of Kotlin Survey cited the absence of NPE as the main reason for switching. "Over the past two years, we have reduced the number of production bugs by 34% solely due to Kotlin's strict typing," claims Dmitry Kolesnikov, CTO of the fintech startup Finovate.

However, critics point to "pitfalls": the size of the final artifact (Kotlin adds 1.2 MB to the APK), compilation speed (2.3 times slower than Java when building with Gradle), and tool fragmentation. "We switched back from Kotlin to Java after discovering that 15% of libraries do not support multiplatform compilation," shares DevOps engineer Ilya Petrov from VK based on his experience.

Interestingly, 2024 has seen a trend towards hybrid projects. According to GitHub analysis, 41% of JVM repositories contain mixed code. "Developers are no longer choosing 'either-or'," explains Roman Elizarov, author of the book "Kotlin in Actions". "We are seeing increased use of Kotlin for writing tests and Gradle scripts, while the system core remains in Java."

Predictions for 2025: experts expect the release of an official LTS version of Kotlin 3.0, which should solve the compatibility problem. "If JetBrains manages to lower the entry barrier for Java developers and optimize the compiler, the debate could end — but for now, both languages remain in the TIOBE top 10," summarizes Stack Overflow analyst Mark Zuckerman.

This article was written for pythonlib.ru. The editorial opinion may not coincide with the views of the quoted authors.