Help me please !!

package com.javarush.task.task08.task0824; import java.util.ArrayList; import java.util.List; import java.util.*; /* Собираем семейство */ public class Solution { public static void main(String[] args) { Human child1 = new Human("sher", true, 27); Human child2 = new Human("jovo", true, 27); Human child3 = new Human("Murod", true, 27); Human father = new Human("Xojixon", true, 55, child1, child2, child3); Human mother = new Human("Zebo", false, 53, child1, child2, child3); Human grendfather = new Human("anabibi", false, 85, father, mother); Human grendfather1 = new Human("anabibi", false, 85, father, mother); Human grendmother = new Human("Matyoqub", true, 89, father, mother); Human grendmother1 = new Human("Matyoqub", true, 89, father, mother); ArrayList<Human> children = new ArrayList<Human>(Arrays.asList(child1, child2, child3, father, mother, grendfather1, grendfather, grendmother1, grendmother)); for(Human h : children){ System.out.println(h); } } public static class Human { String name; boolean sex; int age; ArrayList<Human> children = new ArrayList<>(); public Human (String name, boolean sex, int age, Human ...children){ this.name = name; this.sex = sex; this.age = age; this.children.addAll(Arrays.asList(children)); } public Human(String name, boolean sex, int age){ this.name = name; this.sex = sex; this.age = age; } public String toString() { String text = ""; text += "Имя: " + this.name; text += ", пол: " + (this.sex ? "мужской" : "женский"); text += ", возраст: " + this.age; int childCount = this.children.size(); if (childCount > 0) { text += ", дети: " + this.children.get(0).name; for (int i = 1; i < childCount; i++) { Human child = this.children.get(i); text += ", " + child.name; } } return text; } } }