Когда я использую Scanner для получения символа в java, компилятор выдает:
Exception in thread "main" java.util.NoSuchElementException: No line found
at java.base/java.util.Scanner.nextLine(Scanner.java:1651)
at ShoppingCartManager.getChar(ShoppingCartManager.java:37)
at ShoppingCartManager.printMenu(ShoppingCartManager.java:56)
at ShoppingCartManager.main(ShoppingCartManager.java:30)
Вот часть кода, где выбрасывается исключение
private static final Scanner scan = new Scanner(System.in);
public static void main(String[] args) {
Scanner scnr = new Scanner (System.in);
System.out.println("Enter Customer's Name:");
String name = scnr.nextLine();
System.out.println("Enter Today's Date:");
String date = scnr.nextLine();
System.out.println();
ShoppingCart cart = new ShoppingCart(name, date);
System.out.println("Customer Name: " + name);
System.out.println("Today's Date: " + date + "\n");
printMenu(cart);
scan.close();
}
private static char getChar () {
char option;
while (true) {
try {
option = scan.next().charAt(0);
break;
} catch (Exception exc) {
continue;
}
}
return option;
}
public static void printMenu(ShoppingCart cart) {
while(true) {
System.out.println("MENU");
System.out.println("g - Add Guitar to cart");
System.out.println("c - Add Candy Bar to cart");
System.out.println("s - Add Shoes to cart");
System.out.println("d - Remove item from cart");
System.out.println("n - Change item quantity");
System.out.println("i - Output items' descriptions");
System.out.println("o - Output shopping cart");
System.out.println("q - Quit" + "\n");
System.out.println("Choose an option:");
char option = getChar();
if (option == 'q') {
return;
} else if (option == 'g') {
File guitar;
Scanner iss;
try {
guitar = new File("Guitar.txt");
iss = new Scanner(guitar);
ItemToPurchase item = new ItemToPurchase();
item.setName(iss.nextLine());
item.setDescription(iss.nextLine());
item.setPrice(Integer.parseInt(iss.nextLine()));
item.setQuantity(Integer.parseInt(iss.nextLine()));
cart.addItem(item);
System.out.println("ADDED GUITAR TO CART");
iss.close();
} catch (IOException excp) {
System.out.print(excp);
}
} else if (option == 'c') {
File candyBar;
Scanner iss;
try {
candyBar = new File("Candy_Bar.txt");
iss = new Scanner(candyBar);
ItemToPurchase item = new ItemToPurchase();
item.setName(iss.nextLine());
item.setDescription(iss.nextLine());
item.setPrice(Integer.parseInt(iss.nextLine()));
item.setQuantity(Integer.parseInt(iss.nextLine()));
cart.addItem(item);
System.out.println("ADDED CANDY BAR TO CART");
iss.close();
} catch (IOException excp) {
System.out.print(excp);
}
} else if (option == 's') {
File shoes;
Scanner iss;
try {
shoes = new File("Shoes.txt");
iss = new Scanner(shoes);
ItemToPurchase item = new ItemToPurchase();
item.setName(iss.nextLine());
item.setDescription(iss.nextLine());
item.setPrice(Integer.parseInt(iss.nextLine()));
item.setQuantity(Integer.parseInt(iss.nextLine()));
cart.addItem(item);
System.out.println("ADDED SHOES TO CART");
iss.close();
} catch (IOException excp) {
System.out.print(excp);
}
} else if (option == 'd') {
System.out.println("REMOVE ITEM FROM CART");
System.out.println("Enter name of item to remove");
String item = scan.nextLine();
cart.removeItem(item);
} else if (option == 'n') {
System.out.println("CHANGE ITEM QUANTITY");
System.out.println("Enter the item name");
String name = scan.nextLine();
System.out.println("Enter the new quantity");
int newQuantity = scan.nextInt();
for (int i = 0; i < cart.cartItems.size(); i++) {
if (cart.cartItems.get(i).getName().equals(name)) {
cart.cartItems.get(i).setQuantity(newQuantity);
}
}
} else if (option == 'i') {
System.out.println("OUTPUT ITEMS' DESCRIPTIONS");
cart.printDescriptions();
} else if (option == 'o') {
System.out.println("OUTPUT SHOPPING CART");
cart.printTotal();
} else {
continue;
}
}
}
}
что мне делать?