好的，所以我正在为学校的年终项目制作二十一点游戏，但当我选择在游戏中“站立”时，代码可能会随机忽略我的输入，然后停止一起工作。有人能搞清楚吗？我和我的老师都不能。 （对不起，有这么多代码，我不知道你是否需要所有课程来帮助我）
转轮：
import static java.lang.System.*;
import java.util.Arrays;
public class BlackJackRunner
{
public static void main( String args[] )
{
Deck deck = new Deck();
Game game = new Game();
game.startGame();
// work on resetting btwn each hand and still work on choices i think
}
}
甲板课程：
public class Deck
{
public int[] card = new int[2];
public String number = "";
public Deck()
{
}
public void drawCard()
{
int[] drawn = new int[2];
int switc;
//do{
do{
switc = Rndm.i(0, 51);
String sw = switc + " ";
if(number.indexOf(sw) == -1)
{
if (number.indexOf(sw) > -1)
System.out.println("Problem!!");
switch(switc)
{
//face first, then suit;
//1 - spades 2-clubs 3-hearts 4-diamonds
//2-10 - face value j-11 q-12 k-13 a-1
case 0 : drawn[0] = 2; drawn[1] = 1; number = number + 0 + " "; break;
case 1 : drawn[0] = 3; drawn[1] = 1; number = number + 1 + " "; break;
case 2 : drawn[0] = 4; drawn[1] = 1; number = number + 2 + " "; break;
case 3 : drawn[0] = 5; drawn[1] = 1; number = number + 3 + " "; break;
case 4 : drawn[0] = 6; drawn[1] = 1; number = number + 4 + " "; break;
case 5 : drawn[0] = 7; drawn[1] = 1; number = number + 5 + " "; break;
case 6 : drawn[0] = 8; drawn[1] = 1; number = number + 6 + " "; break;
case 7 : drawn[0] = 9; drawn[1] = 1; number = number + 7 + " "; break;
case 8 : drawn[0] = 10; drawn[1] = 1; number = number + 8 + " "; break;
case 9 : drawn[0] = 11; drawn[1] = 1; number = number + 9 + " "; break;
case 10 : drawn[0] = 12; drawn[1] = 1; number = number + 10 + " "; break;
case 11 : drawn[0] = 13; drawn[1] = 1; number = number + 11 + " "; break;
case 12 : drawn[0] = 1; drawn[1] = 1; number = number + 12 + " "; break;
case 13 : drawn[0] = 2; drawn[1] = 2; number = number + 13 + " "; break;
case 14 : drawn[0] = 3; drawn[1] = 2; number = number + 14 + " "; break;
case 15 : drawn[0] = 4; drawn[1] = 2; number = number + 15 + " "; break;
case 16 : drawn[0] = 5; drawn[1] = 2; number = number + 16 + " "; break;
case 17 : drawn[0] = 6; drawn[1] = 2; number = number + 17 + " "; break;
case 18 : drawn[0] = 7; drawn[1] = 2; number = number + 18 + " "; break;
case 19 : drawn[0] = 8; drawn[1] = 2; number = number + 19 + " "; break;
case 20 : drawn[0] = 9; drawn[1] = 2; number = number + 20 + " "; break;
case 21 : drawn[0] = 10; drawn[1] = 2; number = number + 21 + " "; break;
case 22 : drawn[0] = 11; drawn[1] = 2; number = number + 22 + " "; break;
case 23 : drawn[0] = 12; drawn[1] = 2; number = number + 23 + " "; break;
case 24 : drawn[0] = 13; drawn[1] = 2; number = number + 24 + " "; break;
case 25 : drawn[0] = 1; drawn[1] = 2; number = number + 25 + " "; break;
case 26 : drawn[0] = 2; drawn[1] = 3; number = number + 26 + " "; break;
case 27 : drawn[0] = 3; drawn[1] = 3; number = number + 27 + " "; break;
case 28 : drawn[0] = 4; drawn[1] = 3; number = number + 28 + " "; break;
case 29 : drawn[0] = 5; drawn[1] = 3; number = number + 29 + " "; break;
case 30 : drawn[0] = 6; drawn[1] = 3; number = number + 30 + " "; break;
case 31 : drawn[0] = 7; drawn[1] = 3; number = number + 31 + " "; break;
case 32 : drawn[0] = 8; drawn[1] = 3; number = number + 32 + " "; break;
case 33 : drawn[0] = 9; drawn[1] = 3; number = number + 33 + " "; break;
case 34 : drawn[0] = 10; drawn[1] = 3; number = number + 34 + " "; break;
case 35 : drawn[0] = 11; drawn[1] = 3; number = number + 35 + " "; break;
case 36 : drawn[0] = 12; drawn[1] = 3; number = number + 36 + " "; break;
case 37 : drawn[0] = 13; drawn[1] = 3; number = number + 37 + " "; break;
case 38 : drawn[0] = 1; drawn[1] = 3; number = number + 38 + " "; break;
case 39 : drawn[0] = 2; drawn[1] = 4; number = number + 39 + " "; break;
case 40 : drawn[0] = 3; drawn[1] = 4; number = number + 40 + " "; break;
case 41 : drawn[0] = 4; drawn[1] = 4; number = number + 41 + " "; break;
case 42 : drawn[0] = 5; drawn[1] = 4; number = number + 42 + " "; break;
case 43 : drawn[0] = 6; drawn[1] = 4; number = number + 43 + " "; break;
case 44 : drawn[0] = 7; drawn[1] = 4; number = number + 44 + " "; break;
case 45 : drawn[0] = 8; drawn[1] = 4; number = number + 45 + " "; break;
case 46 : drawn[0] = 9; drawn[1] = 4; number = number + 46 + " "; break;
case 47 : drawn[0] = 10; drawn[1] = 4; number = number + 47 + " "; break;
case 48 : drawn[0] = 11; drawn[1] = 4; number = number + 48 + " "; break;
case 49 : drawn[0] = 12; drawn[1] = 4; number = number + 49 + " "; break;
case 50 : drawn[0] = 13; drawn[1] = 4; number = number + 50 + " "; break;
case 51 : drawn[0] = 1; drawn[1] = 4; number = number + 51 + " "; break;
}
}
}while(drawn[0]==0 && drawn[1]==0);
//}while(number.indexOf(switc) > -1);
if (drawn[0]==0 && drawn[1]==0)
System.out.println("Problem!!");
card[0] = drawn[0];
card[1] = drawn[1];
}
public void shuffleDeck()
{
number = "";
}
public int[] getCard()
{
drawCard();
return card;
}
public String toString()
{
return card[0] + " " + card[1];
}
}
卡类：
public class Card extends Deck
{
public static final String FACES[] = {"ZERO","Ace","Two","Three","Four",
"Five","Six","Seven","Eight","Nine","Ten","Jack","Queen","King"};
public static final String SUITS[] = {"ZERO", "Spades", "Clubs", "Hearts", "Diamonds"};
private int suit;
private int face;
public Card( int f, int s)
{
suit = s;
face = f;
}
public void setFace( int f)
{
face = f;
}
public void setSuit( int s)
{
suit = s;
}
public int getSuit()
{
return suit;
}
public int getFace()
{
return face;
}
public String toString()
{
return FACES[face] + " of " + SUITS[suit];
}
}
BlackJackCard类：
public class BlackJackCard extends Card
{
private int value;
int handVal, dealerHandVal;
int val;
public BlackJackCard(int f, int s)
{
super(f,s);
}
public int getVal()
{
if(getFace() == 1)
{
if(val + 11 > 21)
{
value = 1;
}
else
{
value = 11;
}
}
if(getFace() > 1 && getFace() < 10)
{
value = getFace();
}
if(getFace() > 10)
{
value = 10;
}
return value;
}
public String toString()
{
return FACES[getFace()] + " of " + SUITS[getSuit()]+ " ";
}
}
游戏课程：
import static java.lang.System.*;
import java.util.Scanner;
import java.util.Arrays;
public class Game
{
Scanner keyboard = new Scanner(System.in);
Deck deck = new Deck();
public int money, bet;
int[] card = new int[2];
int[][] playerHand = new int[10][2];
int[][] dealerHand = new int[10][2];
int handPlace;
int pHandVal;
int dHandVal;
boolean bust;
boolean dBust;
public void startGame()
{
out.println("Hello! Welcome to the Compsci Casino!");
out.println("We have a game of Blackjack prepared for you right here.");
out.println("It seems you've brought in $1000 in chips. You may use that to bet on your games.");
out.println("Here is your table, good luck!");
money = 1000;
out.println("\n\n");
do{
startRound();
}while(money > 0);
out.println("Well, it looks like you're broke. Come back when you've got some money to bet.");
}
public void startRound()
{
out.println("Alright, before I deal anything, you gotta bet some of your chips.");
bet();
deal();
game();
}
public void printCards()
{
out.println("Dealer's card : " + getCardName(dealerHand[0][0], dealerHand[0][1]) + "\n");
out.println("Your hand : ");
for(int i = 0; i < 10; i++)
{
if(playerHand[i][0] != 0)
{
out.println(getCardName(playerHand[i][0], playerHand[i][1]));
}
}
out.println("");
}
public void game()
{
int c;
do{
printCards();
c = choice();
if(c == 1)
{
handPlace = 0;
for(int i = 0; i < 10; i++)
{
if(playerHand[i][0] != 0)
{
handPlace += 1;
}
}
card = deck.getCard();
playerHand[handPlace][0] = card[0];
playerHand[handPlace][1] = card[1];
pHandVal += getHandVal(playerHand[handPlace][0], playerHand[handPlace][1]);
if(checkBust(pHandVal) == true)
{
out.println("you busted" + "\n");
}
}
else if(c == 2)
{
do{
if(dHandVal <= pHandVal)
{
dealerPlay();
}
}while(checkBust(dHandVal) != true);
}
else if(c == 3)
{
money -= bet;
bet = bet*2;
}
bust = checkBust(pHandVal);
dBust = checkBust(dHandVal);
}while(c != 2 && bust != true);
printDealerHand();
if(dBust == true)
{
out.println("Dealer busts, you win!");
money += bet*2;
}
else if(dBust != true)
{
if(bust != true && pHandVal > dHandVal)
{
out.print("you win!");
money += bet*2;
}
}
else if(bust == true)
{
out.println("you busted" + "\n");
}
else if(dHandVal > pHandVal)
{
out.println("Dealer wins");
}
}
public void printDealerHand()
{
out.println("Dealer's cards : " + "\n");
for(int i = 0; i < 10; i++)
{
if(dealerHand[i][0] != 0)
{
out.println(getCardName(dealerHand[i][0], dealerHand[i][1]));
}
}
out.println("Your hand : ");
for(int i = 0; i < 10; i++)
{
if(playerHand[i][0] != 0)
{
out.println(getCardName(playerHand[i][0], playerHand[i][1]));
}
}
out.println("");
}
public int getHandVal(int f, int s)
{
BlackJackCard bjc = new BlackJackCard(f, s);
int value = bjc.getVal();
return value;
}
public boolean checkBust(int val)
{
if(val > 21)
{
return true;
}
return false;
}
public void dealerPlay()
{
handPlace = 0;
for(int i = 0; i < 10; i++)
{
if(dealerHand[i][0] != 0)
{
handPlace += 1;
}
}
card = deck.getCard();
dealerHand[handPlace][0] = card[0];
dealerHand[handPlace][1] = card[1];
dHandVal += getHandVal(dealerHand[handPlace][0], dealerHand[handPlace][1]);
}
public String getCardName(int f, int s)
{
BlackJackCard blackJackCard = new BlackJackCard(f, s);
return blackJackCard.toString();
}
public void bet()
{
bet = 0;
do{
out.println("you have " + money + " dollars left." + "\n");
out.println("How much will you bet?");
out.print("Amount :: ");
bet = keyboard.nextInt();
if(bet == 0)
{
out.println("It aint free to play here, you cant just bet nothing.");
}
}while(bet == 0);
money = money - bet;
out.println("\n");
}
public int choice()
{
int choice = 0;
do{
out.println("What will you do?");
out.println("1 - Hit");
out.println("2 - Stand");
out.println("3 - Double");
choice = keyboard.nextInt();
if(choice == 1|| choice == 2|| choice == 3)
{
return choice;
}
}while(choice != 1 || choice != 2 || choice != 3);
return 1;
}
public void resetHands()
{
pHandVal = 0;
playerHand[0][0] = 0;
playerHand[0][1] = 0;
playerHand[1][0] = 0;
playerHand[1][1] = 0;
playerHand[2][0] = 0;
playerHand[2][1] = 0;
playerHand[3][0] = 0;
playerHand[3][1] = 0;
playerHand[4][0] = 0;
playerHand[4][1] = 0;
playerHand[5][0] = 0;
playerHand[5][1] = 0;
playerHand[6][0] = 0;
playerHand[6][1] = 0;
playerHand[7][0] = 0;
playerHand[7][1] = 0;
playerHand[8][0] = 0;
playerHand[8][1] = 0;
playerHand[9][0] = 0;
playerHand[9][1] = 0;
dHandVal = 0;
dealerHand[0][0] = 0;
dealerHand[0][1] = 0;
dealerHand[1][0] = 0;
dealerHand[1][1] = 0;
dealerHand[2][0] = 0;
dealerHand[2][1] = 0;
dealerHand[3][0] = 0;
dealerHand[3][1] = 0;
dealerHand[4][0] = 0;
dealerHand[4][1] = 0;
dealerHand[5][0] = 0;
dealerHand[5][1] = 0;
dealerHand[6][0] = 0;
dealerHand[6][1] = 0;
dealerHand[7][0] = 0;
dealerHand[7][1] = 0;
dealerHand[8][0] = 0;
dealerHand[8][1] = 0;
dealerHand[9][0] = 0;
dealerHand[9][1] = 0;
}
public void deal()
{
resetHands();
card = deck.getCard();
playerHand[0][0] = card[0];
playerHand[0][1] = card[1];
card = deck.getCard();
playerHand[1][0] = card[0];
playerHand[1][1] = card[1];
pHandVal = getHandVal(playerHand[0][0], playerHand[0][1]);
pHandVal += getHandVal(playerHand[1][0], playerHand[1][1]);
card = deck.getCard();
dealerHand[0][0] = card[0];
dealerHand[0][1] = card[1];
card = deck.getCard();
dealerHand[1][0] = card[0];
dealerHand[1][1] = card[1];
dHandVal = getHandVal(dealerHand[0][0], dealerHand[0][1]);
dHandVal += getHandVal(dealerHand[1][0], dealerHand[1][1]);
}
}
和随机数生成器类：
public class Rndm
{
public static double d(double low, double high)
{
double r = Math.random()*(high-low)+low;
return r;
}
public static int i(int low, int high)
{
double r = Math.random()*(high-low+1)+low;
return (int)r;
}
}
我的问题似乎与Game类中的choice（）方法有关。它时不时会被调用，它会忽略我的输入并看起来像是无限循环，但是当我查看调试器时，它只是显示扫描仪只是忽略了我的输入。
再一次，我很抱歉有这么多代码，但是没有人可以解决这个问题，我想知道是否有人可以提供帮助。
答案 0 :(得分：0)
如果输入不是整数，则使用Scanner.nextInt()会有问题。它会引发异常，但不会清除缓冲区。
我建议您在try-catch块中使用String input = keyboard.nextLine()和Integer.parseInt(input)之类的内容。
答案 1 :(得分：0)
输入Int之后你正在按键 - 这个字符不会被吞没，所以试试
choice = keyboard.nextInt();
keyboard.nextLine ();
答案 2 :(得分：0)