java

public class One { public static int count = 0; private int number; public One() { count++; number = count; } public One (int num) { number = num; } public String toString() { return count + ", "+ number; } }

public class Two extends One { private String strTwo; public Two() { strTwo = "Fast"; } public Two (String s) { super (15); strTwo = s; } public String toString() { return super.toString() + " "+strTwo; } }

public class Three extends Two { private String strThree; public Three (String s) { strThree = s; } public String toString() { return super.toString() + " "+ strThree; } }

public class Test { public static void main (String[] args) { One[] arr=new One[6]; arr[0]= … // (1) arr[1]= … // (2) arr[2]= … // (3) arr[3]= … // (4) arr[4]= … // (5) arr[5]= … // (6) for (int i = 0; i < arr.length; i++) { System.out.println (arr[i]); } } }

הפלט הנדרש:

4, 1 Fast 4, 2 Fast Car 4, 3 Fast Horse 4, 15 Small 4, 15 Tall 4, 4