OnJava8-Examples/reuse/Jurassic.java at master · CSapprenticeWT/OnJava8-Examples · GitHub

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// reuse/Jurassic.java

// We make no guarantees that this code is fit for any purpose.

// Visit http://OnJava8.com 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++;

}