我一直在从事二十一点程序，由于某种原因，我无法正确处理“另一张纸牌”，因此投注系统似乎也不起作用。另外，我不太确定布尔方法idk在main中的调用位置怎么回事。任何提示将不胜感激！
我已经尝试过交换whiles / ifs，而这一切都变得混乱了。香港专业教育学院也试图使该方法无效，但我需要它返回userWins TRUE或FALSE ..因为它是一个游戏..你知道吗？
import java.io.*;
import java.util.Scanner;
import java.util.Random;
public class ProgramBlackJack {
public static void main(String[] args) throws IOException {
Scanner in ; in = new Scanner(System.in);
int money; // Amount of money the user has.
int bet; // Amount user bets on a game.
boolean userWins = true; // Did the user win the game?
System.out.println("Welcome to Lunas BlackJack table. How's it goin?");
System.out.println();
money = 100; // User starts with $100.
while (true) {
System.out.println("You have " + money + " dollars.");
do {
System.out.println("How much do you wanna bet? Or if you're done, enter 0 to walk away from the tables.)");
System.out.print("$");
bet = in .nextInt();
if (bet < 0 || bet > money) {
System.out.println("Your bet must be between 0 and " + money + '.');
}
}
while (bet < 0 || bet > money); {
if (bet == 0) {
System.out.println("The dealer waves goodbye.");
break; //walk away
}
userWins = playBlackjack(userWins);
if (userWins == true) {
money = money + bet;
}
if (userWins == false) {
money = money - bet;
System.out.println();
}
if (money == 0) {
System.out.println("Aw shoot, looks like you've are out of money!");
break;
}
}
}
System.out.println();
System.out.println("You walk away with $" + money + '.');
} //end method
public static boolean playBlackjack(boolean userWins) {
String anotherCard;
String playAgain = "y";
String ctn;
int nextCard;
int card1;
int card2;
int dCard1;
int dCard2;
int cardTotal = 0;
int dTotal = 0;
Scanner in = new Scanner(System.in);
Random random = new Random();
// Begin dealing the players first two cards
if (playAgain.equals("y")) {
//dealers first two random cards
dCard1 = random.nextInt(11) + 1;
dCard2 = random.nextInt(11) + 1;
//players first two random cards and card total
card1 = random.nextInt(11) + 1;
card2 = random.nextInt(11) + 1;
cardTotal = card1 + card2;
//Dealers two card total and display only one dealer card
dTotal = dCard1 + dCard2;
System.out.println("The dealer shows: " + dCard1);
//Display players first two cards & card total
System.out.println("First cards: " + card1 + ", " + card2);
System.out.println("Total: " + cardTotal);
//Asks if want to deal another card
System.out.print("Another card (y/n)?: ");
anotherCard = in .nextLine();
//If yes
while (anotherCard == "y") { //while1
nextCard = random.nextInt(10) + 1;
cardTotal += nextCard;
System.out.println("Card: " + nextCard);
System.out.println("Total: " + cardTotal);
if (cardTotal > 21) { //if1
System.out.println("You busted, the dealer Wins");
System.out.println("Do you want to play again? (y/n): ");
playAgain = in .nextLine();
} //if1
if (cardTotal < 21) { //if2
System.out.print("Another Card (y/n)?: ");
anotherCard = in .nextLine();
} //if2
if (anotherCard == "n") { //if3
System.out.print("Press c to continue dealers cards");
ctn = in .nextLine();
while (ctn == "c" && dTotal < 17) { //while2
nextCard = random.nextInt(10) + 1;
dTotal += nextCard;
} //while2
if (dTotal > 21) { //if4
System.out.println("Dealer Busts, You Win!");
System.out.println("Play Again? (y/n): ");
playAgain = in .nextLine();
} //if4
if (playAgain.equalsIgnoreCase("y")) //ignorecase = ignore capitals/lowercase
{ //if5
playAgain = "y";
} //if5
if (playAgain.equalsIgnoreCase("n")) //no!
{ //else1
System.exit(0);
} //else1
} //if3
} //while1
} //END BIG WHILE
return userWins = true;
} //end playBlackJack()
} //end main
用户似乎也不会输给经销商，我希望会发生一些损失。我还希望“另一张卡片”中的（是/否）？工作，但是“ n”什么也没做。
我认为您唯一的问题是您尝试返回userWin布尔值的方式：
public static boolean playBlackjack(boolean userWins)
更改为（并在调用时删除输入参数）
public static boolean playBlackjack()
并且在用户丢失时返回false，否则返回true；
例如：
{//if1
System.out.println("You busted, the dealer Wins");
System.out.println("Do you want to play again? (y/n): ");
playAgain = in.nextLine();
return false;
}//if1
完整代码：
public class ProgramBlackJack
{
public static void main(String[] args)throws IOException
{
Scanner in;
in = new Scanner(System.in);
int money;
int bet; // Amount user bets on a game.
boolean userWins = true; // Did the user win the game?
System.out.println("Welcome to Lunas BlackJack table. How's it goin?");
System.out.println();
money = 100; // User starts with $100.
while (true)
{
System.out.println("You have " + money + " dollars.");
do
{
System.out.println("How much do you wanna bet? Or if you're done, enter 0 to walk away from the tables.)");
System.out.print("$");
bet = in.nextInt();
if (bet < 0 || bet > money)
{
System.out.println("Your bet must be between 0 and " + money + '.');
}
}
while (bet < 0 || bet > money);
{
if (bet == 0)
{
System.out.println("The dealer waves goodbye.");
break; //walk away
}
userWins = playBlackjack();
if (userWins == true)
{
money = money + bet;
}
if (userWins == false)
{
money = money - bet;
System.out.println();
}
if (money == 0)
{
System.out.println("Aw shoot, looks like you've are out of money!");
break;
}
}
}
System.out.println();
System.out.println("You walk away with $" + money + '.');
} //end method
public static boolean playBlackjack()
{
String anotherCard;
String playAgain = "y";
String ctn;
int nextCard;
int card1;
int card2;
int dCard1;
int dCard2;
int cardTotal = 0;
int dTotal = 0;
Scanner in = new Scanner(System.in);
Random random = new Random();
// Begin dealing the players first two cards
if (playAgain.equals("y"))
{
//dealers first two random cards
dCard1 = random.nextInt(11) + 1;
dCard2 = random.nextInt(11) +1;
//players first two random cards and card total
card1 = random.nextInt(11) + 1;
card2 = random.nextInt(11) + 1;
cardTotal = card1 + card2;
//Dealers two card total and display only one dealer card
dTotal = dCard1 + dCard2;
System.out.println("The dealer shows: " + dCard1);
//Display players first two cards & card total
System.out.println("First cards: " + card1 + ", " +card2);
System.out.println("Total: "+ cardTotal);
//Asks if want to deal another card
System.out.print("Another card (y/n)?: ");
anotherCard = in.nextLine();
//If yes
while (anotherCard.equals("y"))
{//while1
nextCard = random.nextInt(10) + 1;
cardTotal += nextCard;
System.out.println("Card: " + nextCard);
System.out.println("Total: " + cardTotal);
if (cardTotal > 21)
{//if1
System.out.println("You busted, the dealer Wins");
System.out.println("Do you want to play again? (y/n): ");
playAgain = in.nextLine();
return false;
}//if1
if (cardTotal < 21)
{//if2
System.out.print("Another Card (y/n)?: ");
anotherCard = in.nextLine();
}//if2
if (anotherCard == "n")
{//if3
System.out.print("Press c to continue dealers cards");
ctn = in.nextLine();
while (ctn == "c" && dTotal < 17)
{//while2
nextCard = random.nextInt(10) + 1;
dTotal += nextCard;
}//while2
if (dTotal > 21)
{//if4
System.out.println("Dealer Busts, You Win!");
System.out.println("Play Again? (y/n): ");
playAgain = in.nextLine();
return false;
}//if4
if (playAgain.equalsIgnoreCase("y")) //ignorecase = ignore capitals/lowercase
{//if5
playAgain = "y";
}//if5
if (playAgain.equalsIgnoreCase("n")) //no!
{//else1
System.exit(0);
}//else1
}//if3
}//while1
}//END BIG WHILE
return true;
}//end playBlackJack()
} //end main