// Can you spot the bug? - Page 46
package org.effectivejava.examples.chapter08.item46;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Iterator;
import java.util.List;
enum Suit {
CLUB, DIAMOND, HEART, SPADE
}
enum Rank {
ACE, DEUCE, THREE, FOUR, FIVE, SIX, SEVEN, EIGHT, NINE, TEN, JACK, QUEEN, KING
}
class Card {
final Suit suit;
final Rank rank;
Card(Suit suit, Rank rank) {
this.suit = suit;
this.rank = rank;
}
}
public class NestedIteration {
public static void main(String[] args) {
Collection<Suit> suits = Arrays.asList(Suit.values());
Collection<Rank> ranks = Arrays.asList(Rank.values());
List<Card> deck = new ArrayList<Card>();
for (Iterator<Suit> i = suits.iterator(); i.hasNext();)
for (Iterator<Rank> j = ranks.iterator(); j.hasNext();)
deck.add(new Card(i.next(), j.next()));
// Preferred idiom for nested iteration on collections and arrays
// for (Suit suit : suits)
// for (Rank rank : ranks)
// deck.add(new Card(suit, rank));
}
}