oop2 - lab7 Collatio 2n

class Person implements Comparable<Object>{

    private String firstName, lastName;
    private int age;
    private static Collator collator = Collator.getInstane(Locale.getDefault());
    private CollationKey lastNameKey:
    private CollationKey firstNameKey;
    public Person(String firstName, String lastName, int age){
        this.firstName = firstName;
        this.lastName=lastName;
        this.age=age;
        lastNameKey=collator.getCollationKey(lastName.toLowerCase()+" "+ firstName.toLowerCase());
    firstNameKey = collator.getCollationKey(firstName.toLowerCase())+" " + lastName.toLowerCase());
    }

    public String getfirstName() { return this.firstName; }
    public String getlastName() { return this.lastName; }
    public int getAge() {return this.age;}

    public String toString() // Stringvame Stringa
    {
        return "Ime:" + firstName + "Familiq:" + lastName + "Godini:" + age;
    }

    public boolean equals(Object r) { //tui prai neshto
        return this.age==((Person)r).age;}
    public int compareTo(Object o){
         return this.age - ((Person)o).getAge();
     }
}
class LastNameComparator implements Comparator<Object>{

    public int compare(Object a, Object b)
    {
        return ((Person)a).getLastNameKey().compareTo
        (((Person)b).getLastNameKey());
    }
    /* public int comapre(Object a, Object b){
        int res = ((Person)a).getLastName().compareTo(((Person)b).getLastName());
        if(res==0){
            res=((Person)a).getFirstName().compareTo(((Person)b).getFirstName());
        }
        return res;
     } */ //komentar na komentara
}

/*4*/ public class UsersGroup{
    private String groupName;
    private list<User>users=new ArrayList<user>();
    public UsersGroup(String groupName){
        this.groupName = groupName;
    }
    // Dobavqne na parametara
    public void addUser(User toAdd){
        users.add(toAdd);
    }
    public void sortByLastName(){
        Collections.sort(users, new LastNameComparator());
    }
    public void sortByFirstName(){
        Collections.sort(users,new FirstNameComparator());
    }
    public void sortByUserName(){
        Collections.sort(users);
    }
    public String toString(){
        return "Group name:" + groupName + "\n"+users.toString();
    }

    public static void main(String[]args){
        UsersGroup a = new UsersGroup(" ");
        a.addUser(new User());
        System.out.println(a.toString());
        a.sortByFirstName();
        System.out.printl(a.toString(); ///M Повер
    }
}