TestComparator.java

public class TestComparator {

    public static void main(String args[]){

        Person p1 = new Person("Meric",25);
        Person p2 = new Person("Ali",15);

        Person older = older(p1,p2, new PersonComparator());

        System.out.println("Yasi buyuk olan person :" + older.isim); // Meric
    }

    public static Person older(Person p1, Person p2, PersonComparator c){

        return c.compare(p1,p2) > 0 ? p1 : p2;
    }
}