Using constants efficiently
Since everything in Java is an object (unless it's 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 Spock {
companion object {
val SENSE_OF_HUMOR = "None"
}
}
This will work, but you should remember that companion object is an object, after all.
So, this will be translated into the following code, more or less:
public class Spock {
private static final String SENSE_OF_HUMOR = "None";
public String getSENSE_OF_HUMOR() {
return Spock.SENSE_OF_HUMOR;
}
...
}
In this example, the Kotlin compiler generates a getter for our constant, which adds another...