right way to incorporate superclass into a Guava Objects.hashcode() implementation?

Question

Possibly a dumb question, but I don\'t want to screw this up. Let\'s say I have two Java classes, Class1 and Class2, where Class2 extends Class1

Answer 1

Yes, that looks correct. It would be the same if you had Objects.hashCode(f1, f2, f3, f4). If you look at the implementation, it's something like result += 31 * result + hashcodeOfCurrentObject. Which means that your result will be 31 + the super hashcode, which is not exactly the same, but would not be a problem.