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Hmm-Phi3andCards.md(fichier créé)
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| 1 | + | ## So I asked Phi3... | |
| 2 | + | ||
| 3 | + | To generate some code like we talked about with `Deal.java` | |
| 4 | + | ||
| 5 | + | _Read this code._ | |
| 6 | + | ||
| 7 | + | To create a Java program that models a deck of cards, we'll define two main components: Card (using an enum to represent suits and ranks) and Hand (to hold a collection of cards). We will also implement a Deck class that initializes with all possible combinations of these cards. | |
| 8 | + | ### Step 1: Define the Card Enum | |
| 9 | + | ||
| 10 | + | First, we define an enum for both the suit and rank to represent each card uniquely. | |
| 11 | + | ||
| 12 | + | ```java | |
| 13 | + | public enum Suit { | |
| 14 | + | HEARTS, DIAMONDS, CLUBS, SPADES; | |
| 15 | + | } | |
| 16 | + | ||
| 17 | + | public enum Rank { | |
| 18 | + | TWO("Two"), THREE("Three"), FOUR("Four"), FIVE("Five"), SIX("Six"), SEVEN("Seven"), EIGHT("Eight"), NINE("Nine"), TEN("Ten"), JACK("Jack"), QUEEN("Queen"), KING("King"), ACE("Ace"); | |
| 19 | + | ||
| 20 | + | private final String name; | |
| 21 | + | ||
| 22 | + | Rank(String name) { | |
| 23 | + | this.name = name; | |
| 24 | + | } | |
| 25 | + | ||
| 26 | + | public String getName() { | |
| 27 | + | return name; | |
| 28 | + | } | |
| 29 | + | } | |
| 30 | + | ``` | |
| 31 | + | ||
| 32 | + | ### Step 2: Define the Card Class | |
| 33 | + | ||
| 34 | + | Next, we define a Card class that uses these enums to represent each card's suit and rank. | |
| 35 | + | ||
| 36 | + | ```java | |
| 37 | + | public class Card { | |
| 38 | + | private Suit suit; | |
| 39 | + | private Rank rank; | |
| 40 | + | ||
| 41 | + | public Card(Suit suit, Rank rank) { | |
| 42 | + | this.suit = suit; | |
| 43 | + | this.rank = rank; | |
| 44 | + | } | |
| 45 | + | ||
| 46 | + | @Override | |
| 47 | + | public String toString() { | |
| 48 | + | return rank + " of " + suit; | |
| 49 | + | } | |
| 50 | + | } | |
| 51 | + | ``` | |
| 52 | + | ||
| 53 | + | #### Step 3: Define the Deck Class | |
| 54 | + | ||
| 55 | + | Now, we implement a Deck class that initializes with all possible combinations of cards and provides methods for shuffling and dealing. | |
| 56 | + | ||
| 57 | + | ```java | |
| 58 | + | import java.util.ArrayList; | |
| 59 | + | import java.util.Collections; | |
| 60 | + | import java.util.List; | |
| 61 | + | ||
| 62 | + | public class Deck { | |
| 63 | + | private List<Card> deck; | |
| 64 | + | ||
| 65 | + | public Deck() { | |
| 66 | + | this.deck = new ArrayList<>(); | |
| 67 | + | for (Suit suit : Suit.values()) { | |
| 68 | + | for (Rank rank : Rank.values()) { | |
| 69 | + | deck.add(new Card(suit, rank)); | |
| 70 | + | } | |
| 71 | + | } | |
| 72 | + | Collections.shuffle(deck); // Shuffles the deck upon initialization | |
| 73 | + | } | |
| 74 | + | ||
| 75 | + | public List<Card> dealCards(int numberOfCards) { | |
| 76 | + | if (numberOfCards > deck.size()) { | |
| 77 | + | throw new IllegalArgumentException("Cannot deal more cards than are in the deck."); | |
| 78 | + | } | |
| 79 | + | return deck.subList(0, numberOfCards); // Deals a specified number of top-most cards from the deck | |
| 80 | + | } | |
| 81 | + | } | |
| 82 | + | ``` | |
| 83 | + | ||
| 84 | + | #### Step 4: Define the Hand Class | |
| 85 | + | ||
| 86 | + | Finally, we define a Hand class to hold and manage a collection of Card objects. | |
| 87 | + | ```java | |
| 88 | + | import java.util.ArrayList; | |
| 89 | + | import java.util.List; | |
| 90 | + | ||
| 91 | + | public class Hand { | |
| 92 | + | private List<Card> cards; | |
| 93 | + | ||
| 94 | + | public Hand() { | |
| 95 | + | this.cards = new ArrayList<>(); | |
| 96 | + | } | |
| 97 | + | ||
| 98 | + | public void add(Card card) { | |
| 99 | + | if (card == null || cards.contains(card)) { | |
| 100 | + | throw new IllegalArgumentException("Cannot add a duplicate or null card to the hand."); | |
| 101 | + | } | |
| 102 | + | cards.add(card); | |
| 103 | + | } | |
| 104 | + | ||
| 105 | + | @Override | |
| 106 | + | public String toString() { | |
| 107 | + | return "Hand: " + cards; | |
| 108 | + | } | |
| 109 | + | } | |
| 110 | + | ``` | |
| 111 | + | ### Example Usage | |
| 112 | + | ||
| 113 | + | Here's how you might use these classes in a simple program: | |
| 114 | + | ```java | |
| 115 | + | public class Main { | |
| 116 | + | public static void main(String[] args) { | |
| 117 | + | Deck deck = new Deck(); | |
| 118 | + | Hand hand = new Hand(); | |
| 119 | + | ||
| 120 | + | // Deal 5 cards from the deck to the hand | |
| 121 | + | List<Card> dealtCards = deck.dealCards(5); | |
| 122 | + | for (Card card : dealtCards) { | |
| 123 | + | System.out.println(card); | |
| 124 | + | hand.add(card); | |
| 125 | + | } | |
| 126 | + | ||
| 127 | + | // Print out the contents of the hand | |
| 128 | + | System.out.println("Hand: " + hand); | |
| 129 | + | } | |
| 130 | + | } | |
| 131 | + | ``` | |
| 132 | + | ||
| 133 | + | This program demonstrates initializing a deck, dealing cards to a hand, and printing both the dealt cards and the current state of the hand. | |
| 134 | + | ||
| 135 | + | ## But... | |
| 136 | + | ||
| 137 | + | This code has a _huge_ bug in it. Rendering much of this code pretty useless. | |
| 138 | + | Can you describe the bug, and then how to fix it? | |
| 139 | + | ||
| 140 | + | ||
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