import java.util.Calendar;
import java.util.GregorianCalendar;

public class Person {
    private String firstName, lastName;
    private Calendar birthday;
    
    public Person(String fname, String lname, int month, int day, int year) {
        this.firstName = fname;
        this.lastName = lname;
        this.birthday = new GregorianCalendar(year, month-1, day);
    }
    
    public String toString() {
        return this.firstName + " " + this.lastName + ": " + 
               (this.birthday.get(Calendar.MONTH)+1) + "/" +
               this.birthday.get(Calendar.DAY_OF_MONTH) + "/" +
               this.birthday.get(Calendar.YEAR);
    }

//    public int hashCode() {
//        return Math.abs((int)this.birthday.getTimeInMillis() + 
//                        (this.firstName+this.lastName).hashCode());
//    }
   
    ///////////////////////////////////////////////////////////////////////
    
    public static void main(String[] args) {
        Person p1 = new Person("Chris", "Marlowe", 5, 25, 1992);
        System.out.println(p1);
        System.out.println(p1.hashCode());
        
        Person p2 = new Person("Alex", "Cooper", 2, 5, 1994);
        System.out.println(p2);
        System.out.println(p2.hashCode());   
        
        Person p3 = new Person("Pat", "Phillips", 2, 5, 1994);
        System.out.println(p3);
        System.out.println(p3.hashCode()); 

    }
}