使用2个不同的ENUMS在Java中构建一张卡片 [英] Building a deck of cards in java using 2 different ENUMS

问题描述

我有一个课堂实验室（我们被允许寻求外部帮助）创建klondike纸牌。编程时我总是noob（这是我第一个编程类）。我们刚刚了解了枚举，我必须使用它们来构建一个卡座（我已经回顾过关于这个的其他问题，但是我还没有找到一个匹配我需要的解决方案）。我们有两个枚举（等级和诉讼）：

  public enum Rank {
 ACE，
 TWO， 
三，
四，
 FIVE，
 SIX，
 SEVEN，
 EIGHT，
 NINE，
 TEN，
 JACK，
 QUEEN，
 KING;} 
  

和

  public enum Suit {
 CLUBS，
 SPADES，
 HEARTS，
 DIAMONDS;} 
  

现在，我需要将它们组合成一个名为Deck的数组，其原理如下：

  public Deck（）{
 cards = new Card [52]; 
} 
  

要将卡片放入桌面，我一直在尝试使用价值，但我不能正确。这个实验室有一个测试代码，它说我没有得到任何要点。我做错了什么？

  public void fill（）{
 for（int i = 0; i < ; i ++）{
 for（Suit s：Suit.values（））{
 for（Rank r：Rank.values（））{
 cards [i] = new Card（r，或多个）; 
} 
} 
} 
} 
  

任何帮助非常感激谢谢！

解决方案

你说，

现在，我需要将它们组合成一个名为Deck的数组，就是这样：

不，你需要创建一个每个枚举有一个字段的类卡。只有这样，你可以创建一个卡片的甲板。所以这样做 - 创建一个卡类，给它至少两个字段，每个枚举一个，加上一个适当的构造函数，加上getter，加上一个体面的 toString（）和那么你设置了。

另外这是错误的：

  public void fill（）{
 for（int i = 0; i <52; i ++）{//摆脱这个循环
 for（西装s：Suit.values（））{
 for（Rank r：Rank.values（））{
 cards [i] = new Card（r，s）; 
} 
  

上面的代码将尝试将52张卡片填入每个索引点。例如，它将尝试将所有52张卡片卡入[0]卡，相同的卡片[1]项目，只有最后一张卡片将被添加。你会有一个数组的52钻石之王 - 不是你想要的。

相反，摆脱外部循环，而是增加我的循环内：

  public void fill（）{
 int i = 0; $（$）$（$）$ {
 $（$）$ {
（b） 
 i ++; //在这里增加
} 
} 
} 
  

I have a lab for class (we are allowed to seek outside help) creating klondike solitaire. I am a total noob when it comes to programming (this is my first ever class in programming). We just learned about enums, and I have to build a deck using them (I've reviewed other questions about this, but I haven't found a solution that matches what I need yet). We have two enums (rank and suit):

public enum Rank {
ACE,
TWO,
THREE,
FOUR,
FIVE,
SIX,
SEVEN,
EIGHT,
NINE,
TEN,
JACK,
QUEEN,
KING;}

and

public enum Suit {    
CLUBS,
SPADES,
HEARTS,
DIAMONDS;}

Now, I need to combine them into an array called Deck, which stands as such:

public Deck() {
    cards = new Card[52];
}

To put the cards into the deck, I've been trying to use the ".values" but I can't get it right. There is a testing code with this lab and it says I'm not getting any of the points for this. What am I doing wrong?

    public void fill() {
        for (int i = 0; i<52;i++){
        for (Suit s : Suit.values()) {
        for (Rank r : Rank.values()) {
            cards[i]= new Card(r,s);
   }
   }
   }
   } 

Any help is much appreciated. Thanks!

解决方案

You state,

Now, I need to combine them into an array called Deck, which stands as such:

No, you need to create a class Card that has one field of each of the enums. Only after doing that can you create a Deck of your Cards. So do that -- create a Card class, give it at least two fields, one for each enum, plus an appropriate constructor, plus getters, plus a decent toString() and then you're set.

Also, this is wrong:

public void fill() {
    for (int i = 0; i<52;i++){ // get rid of this loop
    for (Suit s : Suit.values()) {
    for (Rank r : Rank.values()) {
        cards[i]= new Card(r,s);
}

The code above will try to stuff 52 cards into each index spot. For instance, it will try to stuff all 52 cards into the cards[0] spot, same for the cards[1] item, and only the last Card will be added. You'll have an array of 52 King of Diamonds -- not what you want.

Instead, get rid of the outer loop, and instead increment the i inside your loop:

public void fill() {
  int i = 0;
  for (Suit s : Suit.values()) {
    for (Rank r : Rank.values()) {
      cards[i]= new Card(r,s);
      i++;  // increment i here
    }
  }
}

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