Awesome interface with its default method

Awesome.java

public interface Awesome {
    
  /**
   * say hello!
   */
  void sayHello();
    
  /**
   * eat something!
   * @param something thing to be eaten
   */
  default void eat(String something) {
    System.out.printf("nom nom %s.. %n", something);
  }
}

AwesomeSingaporean.java

public class AwesomeSingaporean implements Awesome{

  @Override
  public void sayHello() {
    System.out.println("Hello!");
  }
    
  @Override
  public void eat(String something) {
    System.out.printf("makan %s..%n", something);
  }
}

InterfaceEvolutionMain.java

public class InterfaceEvolutionMain {

  public static void main(String[] args) {

    List<Awesome> awesomePeople = new LinkedList<>();
    Awesome spaniard = new AwesomeSpaniard();
    awesomePeople.add(spaniard);
    
    Awesome indonesian = new AwesomeIndonesian();
    awesomePeople.add(indonesian);
    
    Awesome swedish = new AwesomeSwedish();
    awesomePeople.add(swedish);
    
    Awesome singaporean = new AwesomeSingaporean();
    awesomePeople.add(singaporean);
    
    awesomePeople.forEach(ap -> {
        ap.sayHello();
        ap.eat("roti prata kosong");
    });

  }
}

InterfaceEvolutionMain.out

Hola!
nom nom roti prata kosong.. 
Halo!
nom nom roti prata kosong.. 
Hej hej!
nom nom roti prata kosong.. 
Hello!
makan roti prata kosong..