Person.java

import java.time.*;

public class Person
{
	private String firstName;
	private String lastName;
	private LocalDate birthday;	

	public Person()
	{
		this.firstName = null;
		this.lastName = null;
		birthday = null;
		System.out.println("Default Person Constructor");
	}

	public Person(String fName, String lName)
	{
		this.firstName = fName;
		this.lastName = lName;
		birthday = LocalDate.now();
	}
	
	public void setBirthday(int year, int month, int day)
	{
		this.birthday = LocalDate.of(year, month, day);
	}
	
	public String getName()
	{
		if(firstName==null||lastName==null)
			return null;
		return firstName+" "+lastName;
	}
	
	public String getBirthday()
	{
		if(birthday == null)
			return null;
		return birthday.toString();
	}

	public String toString()
	{
		return "PERSON: "+getName()+" "+getBirthday();
	}

	public void greeting()
	{
		System.out.println("Hello, my name is "+this.firstName+".\n\tI am a person.");
	}
}