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I have a Kotlin source file, but I want to translate it to Java.
How can I convert Kotlin to Java source?
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Android Studio does exactly the same to carry out the code conversion from Kotlin to Java. Developers may have many reasons to convert the Kotlin code into Java such as: To integrate features that are easy to implement in Java language. To resolve some performance issue that is difficult to locate in Kotlin.
No, it just needs kotlin-stdlib as a dependency to use it from Java.
In Android Studio 3.0, open a Java file and select Code > Convert Java File to Kotlin File. Or, create a new Kotlin file (File > New > Kotlin File/Class), and then paste your Java code into that file—when prompted, click Yes to convert the code to Kotlin.
As @Vadzim said, in IntelliJ or Android Studio, you just have to do the following to get java code from kotlin:
Menu > Tools > Kotlin > Show Kotlin BytecodeDecompile buttonUpdate:
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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You can compile Kotlin to bytecode, then use a Java disassembler.
The decompiling may be done inside IntelliJ Idea, or using FernFlower https://github.com/fesh0r/fernflower (thanks @Jire)
There was no automated tool as I checked a couple months ago (and no plans for one AFAIK)
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