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问题（简短版本）：如何比较ArrayList中的元素彼此？比较ArrayList扑克游戏Java
我已经掌握了ArrayList的大部分基础知识（包括添加，获取，设置，大小...）。我无法进入ArrayList来比较对象（扑克牌的价值和套装），以确定最佳的扑克牌。我有一个课程来存储关于卡片的信息。
卡类：
/** class Card : for creating playing card objects
* it is an immutable class.
* Rank - valid values are 1 to 13
* Suit - valid values are 0 to 3
* Do not modify this class!
*/
class Card {
/* constant suits and ranks */
static final String[] Suit = {"Clubs", "Diamonds", "Hearts", "Spades" };
static final String[] Rank = {"","A","2","3","4","5","6","7","8","9","10","J","Q","K"};
/* Data field of a card: rank and suit */
private int cardRank; /* values: 1-13 (see Rank[] above) */
private int cardSuit; /* values: 0-3 (see Suit[] above) */
/* Constructor to create a card */
/* throw PlayingCardException if rank or suit is invalid */
public Card(int rank, int suit) throws PlayingCardException {
if ((rank < 1) || (rank > 13))
throw new PlayingCardException("Invalid rank:"+rank);
else
cardRank = rank;
if ((suit < 0) || (suit > 3))
throw new PlayingCardException("Invalid suit:"+suit);
else
cardSuit = suit;
}
/* Accessor and toString */
/* You may impelemnt equals(), but it will not be used */
public int getRank() { return cardRank; }
public int getSuit() { return cardSuit; }
public String toString() { return Rank[cardRank] + " " + Suit[cardSuit]; }
/* Few quick tests here */
public static void main(String args[])
{
try {
Card c1 = new Card(1,3); // A Spades
System.out.println(c1);
c1 = new Card(10,0); // 10 Clubs
System.out.println(c1);
//c1 = new Card(10,5); // generate exception here
}
catch (PlayingCardException e)
{
System.out.println("PlayingCardException: "+e.getMessage());
}
}
}
和A类检查卡每手（这是我在遇到麻烦搞清楚类）。我目前添加了代码，以使其添加一个ArrayList并再次打印每一个（只是为了确保我可以创建一个单独的ArrayList，因为我对自己的能力不太满意），但我无法弄清楚如何比较每张卡的要素（等级和套装）。
检查手类：
/** Check current currentHand using multipliers and goodHandTypes arrays
* Must print yourHandType (default is "Sorry, you lost") at the end o function.
* This can be checked by testCheckHands() and main() method.
*/
private void checkHands()
{
// implement this method!
ArrayList<Card> multiplierCheck = new ArrayList<Card>();
String yourhandtype = "Sorry, you lost";
for (int toList = 0; toList<5; toList++) {
multiplierCheck.add(currentHand.get(toList));
}
System.out.println(multiplierCheck);
System.out.println(yourhandtype);
}
，并测试检查创建的手被获胜的手（直，同花顺，三张相同的牌）之手的方法。我无法弄清楚如何比较我的Check Hands Class中的各张牌。
testCheckHands（）方法
public void testCheckHands()
{
try {
currentHand = new ArrayList<Card>();
// set Royal Flush
currentHand.add(new Card(1,3));
currentHand.add(new Card(10,3));
currentHand.add(new Card(12,3));
currentHand.add(new Card(11,3));
currentHand.add(new Card(13,3));
System.out.println(currentHand);
checkHands();
System.out.println("-----------------------------------");
// set Straight Flush
currentHand.set(0,new Card(9,3));
System.out.println(currentHand);
checkHands();
System.out.println("-----------------------------------");
// set Straight
currentHand.set(4, new Card(8,1));
System.out.println(currentHand);
checkHands();
System.out.println("-----------------------------------");
// set Flush
currentHand.set(4, new Card(5,3));
System.out.println(currentHand);
checkHands();
System.out.println("-----------------------------------");
// "Royal Pair" , "Two Pairs" , "Three of a Kind", "Straight", "Flush ",
// "Full House", "Four of a Kind", "Straight Flush", "Royal Flush" };
// set Four of a Kind
currentHand.clear();
currentHand.add(new Card(8,3));
currentHand.add(new Card(8,0));
currentHand.add(new Card(12,3));
currentHand.add(new Card(8,1));
currentHand.add(new Card(8,2));
System.out.println(currentHand);
checkHands();
System.out.println("-----------------------------------");
// set Three of a Kind
currentHand.set(4, new Card(11,3));
System.out.println(currentHand);
checkHands();
System.out.println("-----------------------------------");
// set Full House
currentHand.set(2, new Card(11,1));
System.out.println(currentHand);
checkHands();
System.out.println("-----------------------------------");
// set Two Pairs
currentHand.set(1, new Card(9,1));
System.out.println(currentHand);
checkHands();
System.out.println("-----------------------------------");
// set Royal Pair
currentHand.set(0, new Card(3,1));
System.out.println(currentHand);
checkHands();
System.out.println("-----------------------------------");
// non Royal Pair
currentHand.set(2, new Card(3,3));
System.out.println(currentHand);
checkHands();
System.out.println("-----------------------------------");
}
catch (Exception e)
{
System.out.println(e.getMessage());
}
}
checkHnads究竟做了些什么以及它不起作用？ –
@peeskillet我认为它还没有做任何事情。我认为这就是OP所要求的。 Mikael究竟是什么问题？我假设你拥有的是每个玩家手中的ArrayList，这样你就可以获得纸牌并与扑克规则进行比较。这个问题实际上是否与ArrayList或比较扑克牌值有关？ – Radiodef
@Radiodef我只是不确定如何访问里面的arraylist卡内的信息。我已经想出了如何使用[arraylist name] .get（0）.getRank（）来访问这些套装，但是我很难找出比较的结果，找到直线（来自队伍）以及如何让一个“价值”超过另一个皇家同花顺>三类>同花>直（或者其他顺序）。 – MikaelCMiller