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I'd like to start adding some Kotlin to my Java project. To do that I need to be able to compile both Java and Kotlin files from the command line, which is fine apart from when files of different types depend on each other e.g. A.java depends on B.kt which in turn depends on C.java.
Is there any way to do this without using Gradle, Maven etc?
Edited to clarify thanks @Nikita for pointing out it is not clear that I want both java and Kotlin files in the same source tree
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Control + Alt + shift + k, by this shortcut you can migrate your java code as kotlin.
The Kotlin compiler for JVM compiles Kotlin source files into Java class files. The command-line tools for Kotlin to JVM compilation are kotlinc and kotlinc-jvm . You can also use them for executing Kotlin script files.
No, kotlinc compiles only Kotlin files ( . kt ). A mixed-language project requires combining both kotlinc and javac .
Adding Java source code to an existing Kotlin project If you already have the Java classes, you can just copy them to the project directories. You can now consume the Java class from Kotlin or vice versa without any further actions. lets you call it from Kotlin like any other type in Kotlin.
To achieve this, you will need to run two steps.
kotlinc targeting *.kt files. Add all required java sources on classpath. Note the destination location.javac targeting *.java files. Add *.class files created by step 1 to classpath.Result is a combination of *.class files from both steps.
Here is a documetation on Kotlin compiler
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Remember to compile Kotlin first, then compile Java with kotlin-build-classpath from first step.
simple like this:
1. kotlinc ./src/* -d ./buildTmp
2. javac ./src/**.java -d ./buildTmp -classpath ./buildTmp
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