// reuse/Jurassic.java // ©2016 MindView LLC: see Copyright.txt // We make no guarantees that this code is fit for any purpose. // Visit http://mindviewinc.com/Books/OnJava/ for more book information. // Making an entire class final. class SmallBrain {} final class Dinosaur { int i = 7; int j = 1; SmallBrain x = new SmallBrain(); void f() {} } //! class Further extends Dinosaur {} // error: Cannot extend final class 'Dinosaur' public class Jurassic { public static void main(String[] args) { Dinosaur n = new Dinosaur(); n.f(); n.i = 40; n.j++; } } /* Output: (None) */