Kotlin And Java In The Same Project Using Eclipse IDE

Question

I posted a similar question regarding gradle but this question is without gradle or maven.

I can not get Kotlin working properly using Eclipse IDE. This works great

Answer 1

As of the current Eclipse version (2019-09):

You can't add Kotlin to a Java project, but you can add Java to a Kotlin project.

The procedure to accomplish a mixed Kotlin/Java project was roughly:

1. Install Kotlin plug-in
2. Create empty Kotlin project
3. Move the Java code into the Kotlin project
4. Delete the original project
5. Fix project references