Constants

Since everything in Java is an object (unless you're a primitive type), we're used to putting all the constants inside our objects as static members.

And since Kotlin has companion objects, we usually try putting them there:

class MyClass {
companion object {
val MY_CONST = "My Const"
}
}

This will work, but you should remember that companion object is an object, after all.

So, this will be translated to the following code, more or less:

public final class Spock {
@NotNull
private static final String MY_CONST = "My Const";
   public static final Spock.Companion Companion = new Spock.Companion(...);

public static final class Companion {
@NotNull
public final String getMY_CONST() {
return MyClass.MY_CONST;
}

private Companion() {
      }
   }
}

And the call to our constant looks like this:

String var1 = Spock.Companion.getSENSE_OF_HUMOR();
System.out.println(var1);

So, we have our class, Spock, inside of which we have another class. But what we wanted was only static final String.

Let's...