Are Java and Kotlin interchangeable?

For most, Kotlin’s strengths outweigh the language’s setbacks . There are definite limitations within Java that impede Android API design. Kotlin is inherently lightweight, clean and far less verbose, especially in terms of writing callbacks, data classes, and getters/setters.

You can use both Android Studio and IntelliJ IDE software to convert Java code to Kotlin . If you are using a Kotlin based project in Android Studio or IntelliJ IDE software and try to copy/paste Java code, you should get a prompt to automatically convert Java code to Kotlin (as shown in the screenshot below).

It is easy to migrate from Java code to Kotlin language because of its compatibility . Therefore, when you are using Kotlin language in Android, you can easily run it from the Java code. This helps convert portions of an Android app or library, and it saves developers from doing the entire conversion in a huge refactor.

Kotlin is interchangeable with Java irrespective of the difference between Java vs Kotlin . We can call Kotlin code in Java and Java code in Kotlin. So we can have both Java vs Kotlin classes side by side in a project and compiles without any issues.