Can Java and Kotlin work together?

Originally Answered: Can a package in an Android app have both the Kotlin code and the Java code? Yes. You can even call Kotlin and Java code together , Kotlin was made to be a JVM language, and works very well with Java. You can even compile it to JavaScript.

In fact, Kotlin code is fully compatible with Java code . Therefore, you can be able to use both the Java and Kotlin languages in a single project due to Interoperability.

Yes, when targeting the JVM, Kotlin is compiled to JVM *. class files , which is a bytecode format that can later be either interpreted by a JVM, or compiled to the machine code by the JVM during the program run (JIT), or even compiled ahead-of-time (AOT) down to the machine code.