在我的主要方法中,当试图创建一个新的牌组时,eclipse正在给我“DeckOfCards无法解析为变量”
当我将多个.java文件合并为一个文件以便于移植时,这种情况就开始发生了。
我正在试图解决这个问题......请帮忙
import java.util.Random;
public class PokerGame {
class Card {
private String face; // face of card ("Ace", "Deuce", ...)
private String suit; // suit of card ("Hearts", "Diamonds", ...)
// two-argument constructor initializes card's face and suit
public Card(String cardFace, String cardSuit) {
face = cardFace; // initialize face of card
suit = cardSuit; // initialize suit of card
} // end two-argument Card constructor
// return String representation of Card
public String toString() {
return face + " of " + suit;
} // end method toString
}
class DeckOfCards {
private Card[] deck; // arrays of Card objects
private int currentCard; // index of next Card to be dealt (0-51)
private static final int NUMBER_OF_CARDS = 52; // constant # of Cards
// random number generator
private final Random randomNumbers = new Random();
// constructor fills deck of Cards
public DeckOfCards() {
String[] faces = {
"Ace", "Deuce", "Three", "Four", "Five", "Six", "Seven", "Eight", "Nine", "Ten", "Jack", "Queen", "King"
};
String[] suits = {
"Hearts", "Diamonds", "Clubs", "Spades"
};
deck = new Card[NUMBER_OF_CARDS]; // create array of Card objects
currentCard = 0; // set currentCard so first Card dealt is deck[ 0 ]
// populate deck with Card objects
for (int count = 0; count < deck.length; count++)
deck[count] = new Card(faces[count % 13], suits[count / 13]);
} // end DeckOfCards constructor
// shuffle deck of Cards with one-pass algorithm
public void shuffle() {
// after shuffling, dealing should start at deck[ 0 ] again
currentCard = 0; // reinitialize currentCard
// for each Card, pick another random Card (0-51) and swap them
for (int first = 0; first < deck.length; first++) {
// select a random number between 0 and 51
int second = randomNumbers.nextInt(NUMBER_OF_CARDS);
// swap current Card with randomly selected Card
Card temp = deck[first];
deck[first] = deck[second];
deck[second] = temp;
} // end for
} // end method shuffle
// deal one Card
public Card dealCard() {
// determine whether Cards remain to be dealt
if (currentCard < deck.length) return deck[currentCard++]; // return current Card in array
else return null; // return null to indicate that all Cards were dealt
} // end method dealCard
}
public static void main(String[] args) {
Card[] hand1, hand2;
PokerGame.DeckOfCards myDeckOfCards = DeckOfCards.new DeckOfCards();
myDeckOfCards.shuffle(); // place Cards in random order
hand1 = new Card[5];
hand2 = new Card[5];
// print 5 Cards in the order in which they are dealt
for (int i = 0; i < 10; i++) {
if (i == 0) //display hand labels
System.out.printf("Hand 1: \t Hand 2: \n");
if (i < 5) {
hand1[i] = myDeckOfCards.dealCard();
System.out.printf("%-19s", hand1[i]);
}
if (i >= 5) {
hand2[i - 5] = myDeckOfCards.dealCard();
System.out.printf("%-19s", hand2[i - 5]);
}
if ((i + 1) % 2 == 0) // output a newline after every other card
System.out.println();
} // end for
}
}
答案 0 :(得分:2)
更改
PokerGame.DeckOfCards myDeckOfCards = DeckOfCards.new DeckOfCards();
到
PokerGame.DeckOfCards myDeckOfCards = new PokerGame.DeckOfCards();
答案 1 :(得分:1)
您的两个班级Card
和DeckOfCards
应为static
,即:
static class Card {
...
}
static class DeckOfCards {
...
}
否则你需要一个PokerGame
类的实例来创建它们,这是一个设计缺陷,因为PokerGame
没有“状态”(没有字段/变量)。
实际上,它们应该是他们自己的top = level类(在他们自己的java文件中)。
答案 2 :(得分:0)
DeckOfCards.new DeckOfCards();
这是错误的。试试new PokerGame.DeckOfCards()
或new DeckOfCards();
答案 3 :(得分:0)
这不是内部阶级的工作方式。
首先需要创建PokerGame
实例的实例:
PokerGame game = new PokerGame();
DeckOfCards myDeckOfCards = game.new DeckOfCards();
...
答案 4 :(得分:0)
将Card和DeckOfCards定义移出PokerGame类定义之外,如此
public class PokerGame {
//your code goes here
}
class Card {
//your code goes here
}
class DeckOfCards{
//your code goes here
}
这解决了内部类实例化的问题,但它不是一个好的设计。 类定义应该在它们各自的文件中,以便以后更容易合并更改。