So, instead of using the IntelliJ IDEA, we can directly use Fernflower. Under the hood, the IntelliJ IDEA uses the Fernflower. You will get the bytecode of your Kotin file.īutton to get your Java code from the bytecode. Open your Kotlin project in the IntelliJ IDEA / Android Studio. Steps to convert your Kotlin source file to Java source file: To integrate some feature that can be easily implemented in Java. So, it becomes easy to convert the Java code into Kotlin and vice-versa.įollowing are some of the advantages or reasons for converting Kotlin code to Java code:

compiling the Kotlin code to the JVM bytecode and then decompile the bytecode to the Java code. How does this converter work? It compiles your kotlin code to java bytecode, next it uses jar fernflower to decompile bytecode to java.Converting a Kotlin file to Java file involves two steps i.e. If you have another reason, you can indicate it in a comment!

Another reason can be the case where we don't understand a piece of kotlin code, and we hope to understand it in java.

We can also consider the fact that we want to remove Kotlin to keep only Java source code. For exemplet to integrate some feature in Java (instead of Kotlin), or to investigate a performance issue. Why convert Kotlin to Java? There can be different reasons for doing this conversion. The currently released version is 1.6.10 (published on December 14, 2021). Is Kotlin hard? It is not a complicated language, it is inspired by existing languages such as C#, Groovy, Java, JavaScript and Scala. Native ? Kotlin/Native is a technology for compiling Kotlin code to native binaries which can run without a virtual machine! It is still in beta. When to use kotlin? Kotlin can be used for any kind of development, be it client-side (With JavaScript), server-side (JVM), Android, embedded systems (With Kotlin/Native), mobile applications.

It has been developed under the Apache 2.0 license and perfected for more than 5 years by the company JetBrains. It is designed to interoperate fully with Java, but it also targets Android, JavaScript and Native. This language is intended to be concise (Rough estimates indicate approximately a 40% cut in the number of lines of code) and 100% interoperable with the Java programming language. Kotlin is a general-purpose programming language with type inference.

Converting kotlin to java