נתונות המחלקות One, Two, Three:

java
1public class One {
2    public static int count = 0;
3    private int number;
4    public One() {
5        count++;
6        number = count;
7    }
8    public One (int num) {
9        number = num;
10    }
11    public String toString() {
12        return count + ",  "+ number;
13    }
14}
15---------------------------------------------
16public class Two extends One {
17    private String strTwo;
18    public Two() {
19        strTwo = "Fast";
20    }
21    public Two (String s) {
22        super (15);
23        strTwo = s;
24    }
25    public String toString() {
26        return super.toString() + "  "+strTwo;
27    }
28}
29-------------------------------------------------
30public class Three extends Two {
31    private String strThree;
32    public Three (String s) {
33        strThree = s;
34    }
35    public String toString() {
36        return super.toString() + "  "+ strThree;
37    }
38}