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Kotlin Tour

joow
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Interoperability

Kotlin -> Java

https://kotlinlang.org/docs/reference/java-interop.html

Kotlin can almost use any Java code without issue.

Instanciate a new user and display its email
val user: UserJava = TODO()
fun displayEmail(): Unit = TODO()
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Java -> Kotlin

https://kotlinlang.org/docs/reference/java-to-kotlin-interop.html

Using Kotlin in Java is almost quite easy.

Check if the password of the user is valid (at least 8 characters)
class User(val email: String, val password: String) {
fun isPasswordValid(): Boolean = TODO()
}
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