3
以下のコードで助けが必要です。ユーザーが「N」を選択するまでプログラムをループさせようとしていますが、次に、オンスで販売されているレモネードと合計クッキーと各種類のシャツの合計を表示します。範囲外の文字列インデックスと入力データを使用する合計
私はループにwhileループでプログラムを置くが、私はエラーを取得：範囲外の文字列インデックス：java.lang.Stringでの0 スレッド「メイン」java.lang.StringIndexOutOfBoundsExceptionで
例外.charAt（Unknown Source） edu.kirkland5.SnackStand.main（SnackStand.java:43）
これらの2つのことを達成するために必要なことを誰かが手伝ってくれれば、私はそれを非常に高く評価します。ありがとうございました！
public static void main(String[] args)
{
Scanner input = new Scanner(System.in);
String userName = "";
int lemonaid = 0;
double OZ12_PRICE = 1.50;
double OZ16_PRICE = 2.00;
char cookies = 0;
double COOKIES_OAT= .75;
double COOKIES_CHOCO= .75;
char tshirt = 0;
double TSHIRT_Y = 15.00;
double TSHIRT_N = 8.00;
char item;
char answer = 0;
System.out.println("Hello. May I ask your name?");
userName = input.nextLine();
while (answer != 'N')
{
System.out.println("Welcome " +userName +". Would you like to purchase something? (Y/N) ");
answer = input.nextLine().charAt(0);
answer = Character.toUpperCase(answer);
System.out.println(" ***Lemonaid Stand Program***");
System.out.println("=======================================");
System.out.println("Enter purchase item, first letter only.");
System.out.println("Lemonaid, Cookies, T-shirt.");
System.out.println("Enter Q to Quit.");
System.out.println();
System.out.println("Enter an item or Q to quit (L,C,T,Q)");
item = input.nextLine().charAt(0);
item = Character.toUpperCase(item);
while (item != 'L' && item != 'C' && item != 'T' && item != 'Q')
{
System.out.println("Invalid input.");
System.out.println("Please enter an item, or Q to quit. (L,C,T,Q): ");
item = input.nextLine().charAt(0);
item = Character.toUpperCase(item);
}
if (item == 'L')
{
System.out.println("What size would you like?");
System.out.printf("%-10s%10.2f\n", "12oz.", OZ12_PRICE);
System.out.printf("%-10s%10.2f\n", "16oz.", OZ16_PRICE);
System.out.println("Input the number only.");
lemonaid = input.nextInt();
while (lemonaid != 12 && lemonaid != 16)
{System.out.println("I'm sorry. Please only input an 16 or 12.");
lemonaid=input.nextInt();
}
if (lemonaid == 12)
{
Sales_Header();
System.out.printf("%-10s%10.2f\n", "12oz.", OZ12_PRICE);
}
else if (lemonaid == 16)
{
Sales_Header();
System.out.printf("%-10s%10.2f\n", "16oz.", OZ16_PRICE);
}
else
{
}
}//end If = L
else if (item == 'C')
{
System.out.println("What type would you like?");
System.out.printf("%-14s%10.2f\n", "Oatmeal", COOKIES_OAT);
System.out.printf("%-10s%10.2f\n", "Chocolate Chip", COOKIES_CHOCO);
System.out.println("Input the first letter only. (O/C)");
cookies = input.nextLine().charAt(0);
cookies = Character.toUpperCase(cookies);
while (cookies != 'O' && cookies != 'C')
{
System.out.println("I'm sorry. Please only input an 'O' or 'C'.");
cookies = input.nextLine().charAt(0);
cookies = Character.toUpperCase(cookies);
}
if (cookies == 'O')
{
Sales_Header();
System.out.printf("%-10s%10.2f\n", "Oatmeal", COOKIES_OAT);
}
else if (cookies == 'C')
{
Sales_Header();
System.out.printf("%-10s%10.2f\n", "Chocolate Chip", COOKIES_CHOCO);
}
else
{
}
}// end else if = C
else if (item == 'T')
{
System.out.println("Would you like that shirt autographed?");
System.out.printf("%-10s%10.2f\n", "With autograph", TSHIRT_Y);
System.out.printf("%-10s%11.2f\n", "W/O autograph", TSHIRT_N);
System.out.println("Select Yes or No (Y/N)");
tshirt = input.nextLine().charAt(0);
tshirt = Character.toUpperCase(tshirt);
while (tshirt != 'Y' && tshirt != 'N')
{
System.out.println("I'm sorry. Please only input an 'Y' or 'N'.");
tshirt = input.nextLine().charAt(0);
tshirt = Character.toUpperCase(tshirt);
}
if (tshirt == 'Y')
{
Sales_Header();
System.out.printf("%-10s%10.2f\n", "With autograph", TSHIRT_Y);
}
else if (tshirt == 'N')
{
Sales_Header();
System.out.printf("%-10s%10.2f\n", "W/O autograph", TSHIRT_N);
}
else
{
}
}//end else if T
else if (item == 'Q')
{
System.out.println("Main Menu.");
}
else
{
}
}//End while loop
}
}
これは大きな助けです！あなたのお時間をありがとうございました。 – ArchAngel