![]() ![]() ![]() Why we’re converting our codebase to Kotlin Shifting away from Java, which we currently use for Android development, and over to Kotlin is not a trivial task. Meta’s Android repository is very large and reaches across our family of apps and technologies, including Facebook, Instagram, Messenger, Portal, and the Quest. So it only makes sense that we would shift our Android development at Meta to Kotlin as we work to make our development workflows more efficient. In recent years, Kotlin has become a popular language for Android development. We’re open sourcing various examples and utilities we used to manipulate Kotlin code as part of this migration.As of today, our Android codebase contains over 10 million lines of Kotlin code.Kotlin is a popular language for Android development and offers some key advantages over Java.We’re sharing lessons learned from shifting our Android development from Java to Kotlin.So, it is recommended to convert the Kotlin code to Java code with the help of IntelliJ IDEA.ĭo share this blog with your fellow developers to spread the knowledge. The above method will generate the Java file but the code will be complicated to understand. Download theĪfter downloading the jar file, run the below command to get the Java file, out of your ![]() Now, we need to decompile the class file generated after the first step. To use Fernflower, follow the below steps: But the demerit of this method is that you will not get the pure Java file and you need to manually download the Fernflower jar file. 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. ![]() Converting a Kotlin file to Java file involves two steps i.e. ![]()
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