我正在研究一个简单的程序，同样的问题会不断出现。它强调input.close();中的关闭一词，并且我通过我的程序搜索以尝试查找任何错误但无济于事。这是我的代码：
import java.util.Scanner;
public static void main(String[] args)
{
Scanner input = new Scanner(System.in);
String runProgram = "";
String itemDesc = "";
char cookieType = ' ';
char shirtType = ' ';
char itemChoice = ' ';
char sizeChoice = ' ';
double itemPrice = 0.0;
double totalSales = 0.0;
int totalSigned = 0;
int totalLemonade = 0;
int totalChocChip = 0;
int totalOatmeal = 0;
int totalRegShirt = 0;
int totalTrans = 0;
//Prime read of item selection
itemChoice = getMenuSelection(input);
while (itemChoice != 'Q')
{
if (itemChoice == 'L')
{
sizeChoice = getCupSize(input);
}
else if (itemChoice == 'C')
{
cookieType = getCookieType(input);
}
else
{
shirtType = getShirtType(input);
}
//displayResults(i
System.out.print("Great, your order is as follows: ");
System.out.print("Item Purchased " + itemDesc);
System.out.print("Item Price $" + itemPrice);
System.out.print(" ");
totalTrans = totalTrans + 1;
totalSales = totalSales + itemPrice;
itemChoice = getMenuSelection(input);
} //END WHILE
System.out.printf("\n%-30s%30s\n", "Total Number of Transactions", totalTrans);
System.out.printf("\n%-30s%30s\n", "ITEM DESCRIPTION", "QUANTITY SOLD");
System.out.printf("%-30s%23s%s\n", "Lemonade", totalLemonade, " ounces");
System.out.printf("%-30s%30s\n", "Chocolate Chip Cookies", totalChocChip);
System.out.printf("%-30s%30s\n", "Oatmeal Cookies", totalOatmeal);
System.out.printf("%-30s%30s\n", "Plain Shirts", totalRegShirt);
System.out.printf("%-30s%30s\n", "Autographed Shirts", totalSigned);
System.out.printf("\n%-30s%25s%.2f\n\n", "TOTAL SALES", "$", totalSales);
//displayResults(totalSales, totalSigned, totalLemonade, totalChocChip, totalOatmeal, totalRegShirt, totalTrans);
System.out.println("Goodbye and thank you for visiting Lemonade Express.");
}//END MAIN
/**
* Input the itemChoice. Accept only Q, L, C, or T
*
*@return One of four characters, shown above
*/
static char getMenuSelection(Scanner consoleInput)
{
Scanner input = new Scanner(System.in);
char itemChoice;
System.out.print("Please enter purchase selection: ");
System.out.print(" (L) Lemonade");
System.out.print(" (C) Cookie");
System.out.print(" (T) T-Shirt");
System.out.print(" (Q) Quit");
itemChoice = consoleInput.nextLine().charAt(0);
itemChoice = Character.toUpperCase(itemChoice);
//tests for valid entry
while (itemChoice != 'L' && itemChoice != 'C' && itemChoice != 'T' && itemChoice != 'Q')
{
System.out.print("Entered wrong item choice! ");
System.out.print("Enter item choice: ");
itemChoice = consoleInput.nextLine().charAt(0);
itemChoice = Character.toUpperCase(itemChoice);
}
return itemChoice;
} //END getMenuSelection
/**
* Input and return Cup Size
* @param consoleInput object to recieve read from console
* @return for one lemonade sale
*/
static char getCupSize(Scanner consoleInput)
{
Scanner input = new Scanner(System.in);
char sizeChoice;
System.out.print("What size lemonade would you prefer:");
System.out.print(" (S) 12 ounce");
System.out.print(" (L) 16 ounce");
sizeChoice = consoleInput.nextLine().charAt(0);
sizeChoice = Character.toUpperCase(sizeChoice);
//tests for valid entry
while (sizeChoice != 'S' && sizeChoice != 'L')
{
System.out.print("Entered wrong item choice! ");
System.out.print("Enter size choice: ");
sizeChoice = input.nextLine().charAt(0);
sizeChoice = Character.toUpperCase(sizeChoice);
}
String itemDesc;
double itemPrice;
int totalLemonade;
if (sizeChoice == 'S')
{
itemDesc = "12 ounce lemonade";
itemPrice = 1.50;
totalLemonade = totalLemonade + 12;
}
else
{
itemDesc = "16 ounce lemonade";
itemPrice = 2.00;
totalLemonade = totalLemonade + 16;
}
return sizeChoice;
}
/**
* Input and return Cookie Type
* @param getCookieType to find price for cookies
* @return for one cookie sale
*/
static char getCookieType(Scanner consoleInput)
{
Scanner input = new Scanner(System.in);
char cookieType;
System.out.print("Which kind of cookie would you prefer?");
System.out.print(" (C) chocolate chip");
System.out.print(" (O) oatmeal");
cookieType = consoleInput.nextLine().charAt(0);
cookieType = Character.toUpperCase(cookieType);
double itemPrice = .75;
while (cookieType != 'S' && cookieType != 'L')
{
System.out.print("Entered wrong item choice! ");
System.out.print("Enter cookie choice: ");
cookieType = input.nextLine().charAt(0);
cookieType = Character.toUpperCase(cookieType);
}
String itemDesc;
if (cookieType == 'S')
{
itemDesc = "Chocolate Chip Cookie";
int totalChocChip = totalChocChip + 1;
}
else
{
itemDesc = "Oatmeal Cookie";
int totalOatmeal = totalOatmeal + 1;
}
return cookieType;
}
/**
* Input and return Shirt Type
* @param getShirtType to find price for shirts
* @return for one shirt sale
*/
static char getShirtType(Scanner consoleInput)
{
Scanner input = new Scanner(System.in);
char shirtType;
System.out.print("Which kind of shirt would you prefer?");
System.out.print(" (A) autographed t-shirt");
System.out.print(" (N) normal t-shirt");
shirtType = input.nextLine().charAt(0);
shirtType = Character.toUpperCase(shirtType);
while (shirtType != 'A' && shirtType != 'N')
{
System.out.printf("\n%s", "Entered wrong item choice! ");
System.out.print("Enter shirt choice: ");
shirtType = input.nextLine().charAt(0);
shirtType = Character.toUpperCase(shirtType);
}
double itemPrice;
String itemDesc;
if (shirtType == 'Y')
{
itemPrice = 15.00;
itemDesc = "Autographed T-shirt";
int totalSigned = totalSigned + 1;
}
else
{
itemPrice = 8.00;
itemDesc = "Regular T-Shirt";
int totalRegShirt = totalRegShirt + 1;
}
return shirtType;
}
input.close();
}
提前感谢您的帮助！
答案 0 :(得分：0)
你的
main不在方法中，这在Java中是不允许的。
您需要将其移至while方法。它可能应该在 } //END WHILE
input.close();
System.out.printf("\n%-30s%30s\n", "Total Number of Transactions", totalTrans);
循环结束后继续，因为您已完成输入：
Intent i = new Intent(getActivity(), RegisterApp.class);
getActivity().startService(i);
完成此操作后，您会发现还有其他编译错误，Eclipse只有在您修复了第一个错误后才能检测到。