How to do it...

Create a Java class with a method name equal to any Kotlin keyword. I am using is as the method name, so my Java class looks as follows:

public class ASimpleJavaClass {
   static void is(){
       System.out.print("Nothing fancy here");
   }
}

Now try calling that method from Kotlin code. If you are using any code editor with the autocomplete feature, it automatically encloses the method name in backticks (` `):

fun main(args: Array<String>) {
   ASimpleJavaClass.`is`()   
}

Similar is the case with other keywords in Kotlin that are qualified identifiers in Java.