main.java

import java.util.ArrayList;
import java.util.Collections;

/**
 * Created by ignacioojanguren on 27/10/16.
 *
 * This class sorts the Kings with roman's numbers by their names.
 * In case two or more kings have the same name, the Kings will be sorted by the value of the roman number.
 */
public class main {

    public static void main(String[] args){

        ArrayList <King> orderKings = new ArrayList<King>();

        King philipII = new King("Philip", "II");
        King charlesI = new King("Charles", "I");
        King alfonsoXIII = new King("Alfonso", "XIII");
        King fernandoXIV = new King("Fernando", "XIV");
        King fernandoXXIV = new King("Fernando", "XXIV");
        King philipIV = new King("Philip", "IV");

        orderKings.add(philipII);
        orderKings.add(charlesI);
        orderKings.add(alfonsoXIII);
        orderKings.add(fernandoXIV);
        orderKings.add(fernandoXXIV);
        orderKings.add(philipIV);

        Collections.sort(orderKings);

        for(King king: orderKings){
            System.out.println(king.toString());
        }
    }
}