How to convert a Kotlin source file to a Java source file

As @Vadzim said, in IntelliJ or Android Studio, you just have to do the following to get java code from kotlin:

  1. Menu > Tools > Kotlin > Show Kotlin Bytecode
  2. Click on the Decompile button
  3. Copy the java code

Update:

With a recent version (1.2+) of the Kotlin plugin you also can directly do Menu > Tools > Kotlin -> Decompile Kotlin to Java.

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