package factory.factorymethod;
import java.util.Iterator;
import java.util.ArrayList;
interface Triple<E> extends Iterable<E> { }
class FieldTriple<E> implements Triple<E> {
  private E one; E two; E three;
  public FieldTriple(E one, E two, E three) {
    this.one = one; this.two = two; this.three = three;
  }
  public Iterator<E> iterator() { return new TheIterator(); }

  private class TheIterator implements Iterator<E> {
    private int i;
    public boolean hasNext() { return i < 3; }
    public E next() {
      i++;
      switch (i) {
      case 1: return one;
      case 2: return two;
      case 3: return three;
      }
      throw new java.util.NoSuchElementException();
    }
    public void remove() { throw new UnsupportedOperationException(); }
  }
}
// Arrays do not play nicely with generics, so use ArrayList
class ArrayTriple<E> implements Triple<E> {
  private ArrayList<E> a = new ArrayList<E>();
  public ArrayTriple(E one, E two, E three) {
    a.add(0,one); a.add(1,two); a.add(2,three);
  }
  public Iterator<E> iterator() { return new TheIterator(); }

  private class TheIterator implements Iterator<E> {
    private int i = -1;
    public boolean hasNext() { return i < 2; }
    public E next() {
      i++;
      if (i <= 2)
        return a.get(i);
      else
        throw new java.util.NoSuchElementException();
    }
    public void remove() { throw new UnsupportedOperationException(); }
  }
}