我试图获取另一种方法的输出并在另一种方法中使用它。我知道还有其他类似于我的问题，但这些问题中的解决方案从未解决过我的问题，尽管它们确实有所帮助。我遇到了问题（问题出在rewardBet（）方法）：
class Player {
private ArrayList<Card>hand;
private double cash, bet;
//double cash, bet;
public Player(double theCash)
{
cash = theCash;
hand = new ArrayList<Card>();
bet = 0;
}
public double wagerBet()
{
Scanner in = new Scanner(System.in);
System.out.print("Wager a bet: ");
double bet = in.nextDouble();
cash = cash - bet;
System.out.println("You wagered " + bet + ". " + "Now you have " + cash + " cash left.");
return bet;
}
public void rewardBet()
{
bet = wagerBet(); //this is supposed to be taking whatever the user wagered as a bet in the previous method and
cash = cash + (bet * 2); // apply it to this formula in order to mutate the total cash the player has
System.out.println("You now have " + cash + "cash.");
}
关于如何让这个下注变量输入结转的任何建议？
编辑，这是你们要求的主要方法：class BlackJack {
public static void main(String[] args)
{
Scanner in = new Scanner(System.in);
Deck myDeck = new Deck();
myDeck.shuffle();
Player me = new Player(1000);
Player dealer = new Player(0);
Card c = myDeck.dealCard();
me.wagerBet();
System.out.println("Your first card is " + c);
me.hit(c);
c = myDeck.dealCard();
System.out.println("Your next card is " + c);
me.hit(c);
c = myDeck.dealCard();
System.out.println("Your total hand is currently " + me.totalHand() + ".");
System.out.println("Dealer showing " + c);
dealer.hit(c);
c = myDeck.dealCard();
String answer;
System.out.print("Hit or Stay?");
answer = in.nextLine();
while(answer.equals("Hit") || answer.equals("hit"))
{
System.out.println("Your next card is " + c);
me.hit(c);
c = myDeck.dealCard();
System.out.println("Your total hand is currently " + me.totalHand() + ".");
if(me.totalHand() == 21)
{
System.out.println("You win");
me.rewardBet();
System.exit(0);
}
else if(me.totalHand() < 21)
{
System.out.print("Hit or Stay?");
answer = in.nextLine();
}
else{
System.out.println("Player bust.");
System.exit(0);
}}
while(dealer.totalHand() < 17)
{
System.out.println("Dealer draws " + c);
dealer.hit(c);
c = myDeck.dealCard();
System.out.println("Dealer's total hand is currently " + dealer.totalHand() + ".");
if(dealer.totalHand() == 21)
{
System.out.println("Dealer wins.");
System.exit(0);
}
else if(dealer.totalHand() > 21)
{
System.out.println("Dealer bust. You win.");
me.rewardBet();
System.exit(0);
}
}
if(me.totalHand() > dealer.totalHand())
System.out.println("You win!");
me.rewardBet();
if(me.totalHand() < dealer.totalHand())
System.out.println("Loooooser");
if(me.totalHand() == dealer.totalHand())
System.out.println("Push. Nobody wins");
}
}
为了澄清我的问题，wagerBet（）方法以赌注的形式要求用户提供双重输入。如果玩家赢了他的手，那么rewardBet（）方法将奖励玩家，给他回去他下注的金额加上奖励，因此打赌* 2＆＃39;。问题是rewardBet（）方法不能识别“赌注”。输入，我试图弄清楚如何做到这一点。所以例如我下注50，所以现在我有950美元（默认为1000）。我赢了这一轮，所以rewardBet（）需要给我100美元。现在它并没有给我任何胜利。
答案 0 :(得分：1)
嗯，主要方法的最后一行有一个问题：
if(me.totalHand() > dealer.totalHand())
System.out.println("You win!");
me.rewardBet();
你需要将这个主体包装在大括号中 - if语句只在print语句中起作用。虽然这似乎不能解决你所描述的问题。
也许您应该考虑完全不同的设计，并避免使用这么多重复的代码。
<强>酒杯：
public class BlackJack
{
private Deck deck;
private Player me;
private Player dealer;
public static void main(String[] args)
{
BlackJack game = new BlackJack();
game.run();
}
public BlackJack()
{
deck = new Deck();
deck.shuffle();
me = new Player("Joe", 1000.0);
dealer = new Player("Dealer", 0);
}
public void run()
{
double bet = requestBet(me);
// Deal your first two cards
dealNextCard(me, "Your first card is ");
dealNextCard(me, "Your second card is ");
me.printHandTotal();
// Deal dealer's first card
dealNextCard(dealer, "Dealer showing ");
while(requestHitOrStay())
{
dealNextCard(me, "Your next card is ");
me.printHandTotal();
if(me.totalHand() == 21)
{
System.out.println(me.getName() + " wins!");
rewardBet(me, bet);
System.exit(0);
}
else if(me.totalHand() > 21)
{
System.out.println(me.getName() + " bust!");
System.exit(0);
}
}
while(dealer.totalHand() < 17)
{
dealNextCard(dealer, "Dealer draws ");
dealer.printHandTotal();
if(dealer.totalHand() == 21)
{
System.out.println(dealer.getName() + " wins!");
System.exit(0);
}
else if(dealer.totalHand() > 21)
{
System.out.println(dealer.getName() + " bust. You win!");
rewardBet(me, bet);
System.exit(0);
}
}
if(me.totalHand() > dealer.totalHand())
{
System.out.println("You win!");
rewardBet(me, bet);
}
else if(me.totalHand() < dealer.totalHand())
{
System.out.println("Loooooser");
}
else
{
System.out.println("Push. Nobody wins");
}
}
public boolean requestHitOrStay()
{
System.out.print("Hit or Stay? ");
Scanner in = new Scanner(System.in);
return in.nextLine().toLowerCase().equals("hit");
}
public void dealNextCard(Player p, String prefix)
{
Card c = deck.dealCard();
System.out.println(prefix + c);
p.addCard(c);
}
public double requestBet(Player p)
{
Scanner in = new Scanner(System.in);
double bet = Integer.MAX_VALUE;
while(bet > p.getCash())
{
System.out.print("Wager a bet: ");
bet = in.nextDouble();
}
p.setCash(p.getCash() - bet);
System.out.println(p.getName() + " wagered " + bet + ". " + "Now they have " + p.getCash() + " cash left.");
return bet;
}
public void rewardBet(Player p, double bet)
{
p.setCash(p.getCash() + bet * 2);
System.out.println(p.getName() + " now has " + p.getCash() + " cash.");
}
}
<强>播放器：
public class Player
{
private ArrayList<Card> hand;
private double cash;
private String name;
public Player(String playerName, double startingCash)
{
hand = new ArrayList<Card>();
cash = startingCash;
name = playerName;
}
public void addCard(Card c)
{
hand.add(c);
}
public int totalHand()
{
int total = 0;
for(Card c : hand)
{
total += c.getValue();
}
return total;
}
public void printHandTotal()
{
System.out.println(name + "'s' total hand is currently " + totalHand() + ".");
}
public String getName()
{
return name;
}
public double getCash()
{
return cash;
}
public void setCash(double cash)
{
this.cash = cash;
}
}