whats wrong in creating objects

Question about the task

Under discussion

public class Solution { public static void main(String[] args) { List<Human> humanObj = new ArrayList<Human>(); humanObj.add(new Human("Vamsi",true,22)); humanObj.add(new Human("Vamsi1",true,22)); humanObj.add(new Human("Vamsi2",true,22)); humanObj.add(new Human("Vamsi3",true,22)); humanObj.add(new Human("Vamsi24",true,22,new Human("V",true,44),new Human("M",true,20))); humanObj.add(new Human("Vamsi25",false,22,new Human("V",true,44),new Human("M",true,20))); humanObj.add(new Human("Vamsi26",false,22,new Human("V",true,44),new Human("M",true,20))); humanObj.add(new Human("Vamsi27",false,22,new Human("V",true,44),new Human("M",true,20))); humanObj.add(new Human("Vamsi28",false,22,new Human("V",true,44),new Human("M",true,20))); for(Human a : humanObj){ System.out.println(a); } // write your code here }

Create the Human class with String name, boolean sex, int age, Human father, and Human mother fields. Create and populate objects so that we end up with: Two grandfathers, two grandmothers, one father, one mother, and three children. Display the objects on the screen.

Note:
If you write your own String toString() method in the Human class, then it will be used to display the object on the screen.

Example output:
Name: Anna, sex: female, age: 21, father: Paul, mother: Kate Name: Kate, sex: female, age: 55 Name: Ben, sex: male, age: 2, father: Michael, mother: Anna …

Requirements:

The program must not read data from the keyboard.
Add the following fields to the Human class: String name, boolean sex, int age, Human father, and Human mother.
Add a constructor: public Human(String name, boolean sex, int age).
Add a constructor: public Human(String name, boolean sex, int age, Human father, Human mother).
Create 9 different Human objects (4 objects without a father and mother and 5 objects with them).
Display all the created objects on the screen.

package com.codegym.task.task07.task0724; import java.util.*; /* Family census */ public class Solution { public static void main(String[] args) { List<Human> humanObj = new ArrayList<Human>(); humanObj.add(new Human("Vamsi",true,22)); humanObj.add(new Human("Vamsi1",true,22)); humanObj.add(new Human("Vamsi2",true,22)); humanObj.add(new Human("Vamsi3",true,22)); humanObj.add(new Human("Vamsi24",true,22,new Human("V",true,44),new Human("M",true,20))); humanObj.add(new Human("Vamsi25",false,22,new Human("V",true,44),new Human("M",true,20))); humanObj.add(new Human("Vamsi26",false,22,new Human("V",true,44),new Human("M",true,20))); humanObj.add(new Human("Vamsi27",false,22,new Human("V",true,44),new Human("M",true,20))); humanObj.add(new Human("Vamsi28",false,22,new Human("V",true,44),new Human("M",true,20))); for(Human a : humanObj){ System.out.println(a); } // write your code here } public static class Human { String name; boolean sex; int age; Human father, mother; public Human(String name, boolean sex, int age){ this.name = name; this.sex = sex; this.age = age; } public Human(String name, boolean sex, int age, Human father, Human mother){ this.name = name; this.sex = sex; this.age = age; this.father = father; this.mother = mother; } // write your code here public String toString() { String text = ""; text += "Name: " + this.name; text += ", sex: " + (this.sex ? "male" : "female"); text += ", age: " + this.age; if (this.father != null) { text += ", father: " + this.father.name; } if (this.mother != null) { text += ", mother: " + this.mother.name; } return text; } } }

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Guadalupe Gagnon

Level 37 , Tampa, United States

26 October 2021, 13:06

The task says to create: "Two grandfathers, two grandmothers, one father, one mother, and three children" That means the first two human objects are the mother and mother of the 5th human object. The next two are the father and mother of the 6th human object. Then the 5th and 6th human objects are the mother and father of the last three human objects. In the above code I don't see this happening, it creates 19 different Human objects instead of 9. The Human inheritance tree should look something like this.:

1 & 2      3 & 4
  ↓          ↓
  5    &     6
       ↓
   7 & 8 & 9