FourthReqNotMatching

Question about the task

Make a family

Java Syntax, Level 8, Lesson 11

Under discussion

Fourth Requirement is not matching

1. Create a Human class with String name, boolean sex, int age, and ArrayList<Human> children fields.
2. Create and populate objects so that we end up with: two grandfathers, two grandmothers, one father, one mother, and three children.
3. Display all the Human objects (Hint: use the Human class's toString() method).

Requirements:

The program should display text on the screen.
The Human class must have four fields.
The Human class must have one method.
The Solution class must have one method.
The program should create objects and fill them with data to get two grandfathers, two grandmothers, one father, one mother, and three children. Then it should display all the Human objects on the screen.

package com.codegym.task.task08.task0824; /* Make a family */ import java.util.*; public class Solution { public static void main(String[] args) { ArrayList<Human> Son_Girl = new ArrayList<> (); ArrayList<Human> GF_GM = new ArrayList<> (); ArrayList<Human> Father_Mother = new ArrayList<> (); ArrayList<Human> Motther = new ArrayList<> (); Human son = new Human("Son1",true,15,null); Human Son1 = new Human("Son2",true,13,null); Human Daughter = new Human("Daughter",false,16,null); Human sona = new Human("Son1a",true,15,null); Human Son1a = new Human("Son2a",true,13,null); Human Daughtera = new Human("Daughtera",false,16,null); Son_Girl.add(Son1); Son_Girl.add(son); Son_Girl.add(Daughter); Motther.add(sona); Motther.add(Son1a); Motther.add(Daughtera); Human Father = new Human("father",true,30,Son_Girl); Human Mother = new Human("mother",false,32,Motther); Father_Mother.add(Father); Human GF1 = new Human("GF1",true,50,Father_Mother); Human GM1 = new Human("GM1",false,45,Father_Mother); GF_GM.add(Mother); Human GF2 = new Human("GF2",true,50,GF_GM); Human GM2 = new Human("GM2",false,45,GF_GM); System.out.println(GF2); System.out.println(GM2); System.out.println(GF1); System.out.println(GM1); System.out.println(Father); System.out.println(Mother); } public static class Human { String name; boolean sex; int age; ArrayList < Human > children; public Human( String name, boolean sex, int age,ArrayList < Human > children){ this.name = name; this.sex = sex; this.age = age; this.children = children; } public String toString() { String text = ""; text += "Name: " + this.name; text += ", sex: " + (this.sex ? "male" : "female"); text += ", age: " + this.age; int childCount = this.children.size(); if (childCount > 0) { text += ", children: " + this.children.get(0).name; for (int i = 1; i < childCount; i++) { Human child = this.children.get(i); text += ", " + child.name; } } return text; } } }

Comments (2)

Popular
New
Old

You must be signed in to leave a comment

Ivan

Level 22 , Nope, Bulgaria

12 December 2019, 19:07

Firstly, you should have 9 objects - 2 GFs, 2 GMs, 1 Mother, 1 Father, 3 children. THUS, remove one set of children, as you have 6 now. Secondly, all of them should be part of ArrayList<Human> children (i.e. Human GF2 = new Human("GF2",true,50,new ArrayList<Human>());) Thirdly, the mother has 2 parents and the father has 2 parents, thus far you utilize 6 out of 9 objects. Fourtly, all children are children to the mother and father. Finally, watch out the for the initialization order :)

Anthony Chalk

Level 30 , London, United Kingdom

12 December 2019, 15:25

You should only create 7 humans in total. Accordingly, get rid of the following lines: 19-21, 25-27, 40-41. Lines 16-18, the list shouldn't be null, otherwise, when you use the toString() method, the program will return an exception. There should be 3 Lists: 1) Should have no elements and should be passed to the grandchildren's parameters 2) Should contain the 3 grandchildren and should be passed to the parents' parameters 3) Should contain one of the parents and should be passed to the grandparent's parameter (it may be that the task requires you to assign one grandparent per parent, if that is the case, create a fourth list, add the other parent to it, and pass it to one of the grandparent's parameters) Then when you display them you should do it like this:

System.out.println(human.toString());