Person Class

import java.util.Collections;
import java.util.Comparator;
import java.util.ArrayList;



public class Person implements Comparable<Person>{
    public String Name;
    public int Age;
    private boolean Gender;
    private Person Father;
    private Person Mother;
    private Person StepMother;
    private Person StepFather;
    private ArrayList<Person> StepChildren = new ArrayList<Person>();
    private ArrayList<Person> Children = new ArrayList<Person>();

    public Person(String Name, int Age, boolean Gender){
        this.Name=Name;
        this.Age = Age;
        this.Gender = Gender;
    }
    public void SetFather(Person Father){
        this.Father= Father;
        this.Father.AddChild(this);
    }

    public void SetMother(Person Father){
        this.Mother= Father;
        this.Mother.AddChild(this);
    }
    public Person GetFather(){
        return this.Father;
    }
    public String About(){
        String GENDER;
        GENDER = Gender ?"Male":"Female";
        return this.Name+" is "+Age+" years old and "+GENDER;
    }
    public void AddChild(Person Child){
        Children.add(Child);
    Collections.sort(Children, Person.AgeComparator);
    }
    public ArrayList<Person> GetChildren(){
        return this.Children;
    }


    public static final Comparator<Person> AgeComparator = new Comparator<Person>(){
            @Override
            public int compare(Person o1, Person o2) {
                return o2.Age - o1.Age;  // This will work because age is positive integer
            }
    };
    public int compareTo(Person p) {
          return p.Age - this.Age;
    }





    public static void main(String[] args){
        Person me = new Person("Dylan",19,true);
        me.SetFather(new Person("Ian", 51,true));
        me.GetFather().AddChild(new Person("Tom",22,true));
        System.out.println(me.GetFather().About());
            for(Person s: me.GetFather().GetChildren()){
                System.out.println(s.About());
            }
    }
}