לפניכם המחלקות E, F, G, H:

java
1public class E {
2        protected int x;
3        public E(){
4                this.x = 5;
5                System.out.println("E x = " + this.x);
6        }
7        public E(int x) {
8                this.x = x;
9        }
10        public int calc() {
11                return this.x;
12        }
13}
14
15public class F extends E {
16        private static int count = 0;
17        public F() {
18                super(8);
19                count++;
20        }
21        public F(int x) {
22                super(x);
23                count++;
24                System.out.println("F count = " + count);
25        }
26        public int calc() {
27                return this.x + 10;
28        }
29}
30
31public class G extends F {
32        public G() {
33                super(3);
34                this.x =this.x* 2;
35                System.out.println("G x = " + this.x);
36        }
37        public int calc() {
38                return super.calc() + 1;
39        }
40        public int squre() {
41                return this.x*this.x;
42        }
43}
44
45public class H extends E {
46        public H() {
47                super();
48                this.x = this.x + 5;
49                System.out.println("H x = " + this.x);
50        }
51        public int calc() {
52                return this.x/2;
53        }
54}

נתונה המחלקה Tester:

java
1public class Tester
2{
3        public static void main(String[] args)
4        {
5                E e1 = new E();
6                E e2 = new F();
7                F f1 = new G();
8                E e3 = new H();
9                E a = new G();
10                E b = new H();
11                F c = new G();
12                // ***
13        }
14}