在JOptionPane中显示数组（字符串）的内容

我这里有三个要求输入的类，应该在对话框中显示一个字符串数组。

第1类：

public class Card { public int rank; public int suit; public String rankName; public String suitName; public String cardName; public Card () { rank = 0; suit = 0; rankName = ""; suitName = ""; cardName = ""; } public int getRank() { return rank; } public void setRank(int rank) { this.rank = rank; } public int getSuit() { return suit; } public void setSuit(int suit) { this.suit = suit; } public String getRankName() { return rankName; } public void setRankName(String rankName) { this.rankName = rankName; } public String getSuitName() { return suitName; } public void setSuitName(String suitName) { this.suitName = suitName; } public String getCardName() { return cardName; } public void setCardName(String cardName) { this.cardName = cardName; } } 

第2类 – 这是我应该输出我存储在数组中的字符串的类。 我认为我在正确的轨道上做generics部分，但我不喜欢那样。 请指导我打印所有这些。

 import javax.swing.JOptionPane; public class Deck { public void assignIntegerValues(Card card) { //Card card = new Card(); String[] suitNameArray = {"Clubs", "Spades", "Hearts", "Diamonds"}; String[] rankNameArray = {"Ace", "Two", "Three", "Four", "Five", "Six", "Seven", "Eight", "Nine", "Ten", "Jack", "Queen", "King"}; List cardName = new ArrayList(); card.setSuitName (suitNameArray[card.getSuit()-1]); card.setRankName (rankNameArray[card.getRank()-1]); card.setCardName (card.getSuitName() + "-" + card.getRankName()); JOptionPane.showMessageDialog(null, card.cardName); } public void displayAll (Card card) { for (int i=0; i<card.cardName.length(); i++) { String print = JOptionPane.showMessageDialog(null, card.cardName[i]); } } } 

第3类：

 import javax.swing.JOptionPane; public class DisplayDeck { public static void main(String[] args) { Card card = new Card(); Deck deck = new Deck(); int answer; String again; do { String suitString = JOptionPane.showInputDialog("Suit: "); card.setSuit (Integer.parseInt(suitString)); String rankString = JOptionPane.showInputDialog("Rank: "); card.setRank (Integer.parseInt(rankString)); deck.assignIntegerValues(card); String answerString = JOptionPane.showInputDialog("Try again? (1/0) "); answer = Integer.parseInt(answerString); } while (answer == 1); deck.displayAll(card); } } 

我正在尝试显示用户输入的cardNames。

Answer 1

另一种方法取决于Deck有一个集合，每个新Card添加到该集合：

 class Deck { private List cards = new ArrayList(); ... } 

是Card覆盖toString() ，

 @Override public String toString() { return cardName; } 

然后displayAll()变得非常简单：

 public void displayAll() { JOptionPane.showMessageDialog(null, new JScrollPane(new JList(cards.toArray()))); } 

Answer 2

 public void displayAll (Card[] cards) { String output = ""; for (int i=0; i 

你需要一个传递给displayAll的数组，否则你只需要一张卡。

然后在实际创建JOptionPane之前构建输出字符串。