Listing 1 declares the aforementioned enum and uses it in a switch statement ... and instance methods in a typesafe enum. After all, a typesafe enum is essentially a special kind of Java class.

Another improvement that was made between Java 11 and Java 17 is in the way the language uses switch statements ... and toString methods are created automatically. A record's fields are final ...

You can grasp the benefits of data classes by comparing the Java code outlined in Listing 11 to the equivalent Kotlin code in Listing 12. Using methods ... prevents the switch from happening ...