Classes Used in the Examples

import java.util.Date;
import java.util.GregorianCalendar;

public class Inventor {

	private String name;
	private String nationality;
	private String[] inventions;
	private Date birthdate;
	private PlaceOfBirth placeOfBirth;

	public Inventor(String name, String nationality) {
		GregorianCalendar c= new GregorianCalendar();
		this.name = name;
		this.nationality = nationality;
		this.birthdate = c.getTime();
	}

	public Inventor(String name, Date birthdate, String nationality) {
		this.name = name;
		this.nationality = nationality;
		this.birthdate = birthdate;
	}

	public Inventor() {
	}

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	public String getNationality() {
		return nationality;
	}

	public void setNationality(String nationality) {
		this.nationality = nationality;
	}

	public Date getBirthdate() {
		return birthdate;
	}

	public void setBirthdate(Date birthdate) {
		this.birthdate = birthdate;
	}

	public PlaceOfBirth getPlaceOfBirth() {
		return placeOfBirth;
	}

	public void setPlaceOfBirth(PlaceOfBirth placeOfBirth) {
		this.placeOfBirth = placeOfBirth;
	}

	public void setInventions(String[] inventions) {
		this.inventions = inventions;
	}

	public String[] getInventions() {
		return inventions;
	}
}

class Inventor(
	var name: String,
	var nationality: String,
	var inventions: Array<String>? = null,
	var birthdate: Date =  GregorianCalendar().time,
	var placeOfBirth: PlaceOfBirth? = null)

public class PlaceOfBirth {

	private String city;
	private String country;

	public PlaceOfBirth(String city) {
		this.city=city;
	}

	public PlaceOfBirth(String city, String country) {
		this(city);
		this.country = country;
	}

	public String getCity() {
		return city;
	}

	public void setCity(String s) {
		this.city = s;
	}

	public String getCountry() {
		return country;
	}

	public void setCountry(String country) {
		this.country = country;
	}
}

class PlaceOfBirth(var city: String, var country: String? = null) {

import java.util.*;

public class Society {

	private String name;

	public static String Advisors = "advisors";
	public static String President = "president";

	private List<Inventor> members = new ArrayList<>();
	private Map officers = new HashMap();

	public List getMembers() {
		return members;
	}

	public Map getOfficers() {
		return officers;
	}

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	public boolean isMember(String name) {
		for (Inventor inventor : members) {
			if (inventor.getName().equals(name)) {
				return true;
			}
		}
		return false;
	}
}

import java.util.*

class Society {

	val Advisors = "advisors"
	val President = "president"

	var name: String? = null

	val members = ArrayList<Inventor>()
	val officers = mapOf<Any, Any>()

	fun isMember(name: String): Boolean {
		for (inventor in members) {
			if (inventor.name == name) {
				return true
			}
		}
		return false
	}
}