this is my first JAVA program about Vending Machine and I have been struggling with passing input Scanner.
package vendingmachine;
import java.util.ArrayList;
import java.util.List;
import java.util.NoSuchElementException;
import java.util.Scanner;
public class VendingMachine {
static Money money= new Money( 50, 0);
private static List<Inventory> listItems = new ArrayList<>();
private static List<Inventory> listCoins = new ArrayList<>();
public VendingMachine() {
listItems.add(new Inventory( "SNACK", 1.25, 10 ));
listItems.add(new Inventory( "COCA", 3.0, 15));
listItems.add(new Inventory("GUM", 1.75, 20));
//coin
listCoins.add(new Inventory("25", 0.25, 20));
listCoins.add(new Inventory("100", 1.0, 10));
listCoins.add(new Inventory("5", 0.05, 30));
listCoins.add(new Inventory("10", 0.1, 20));
}
public static void display() {
// TODO Auto-generated method stub
System.out.println("Welcome to Vending Machine: ");
getmoney(0);
showItems();
}
public static void showItems() {
System.out.println("Items are shown below");
for (int i=0; i<listItems.size();i++) {
System.out.println(listItems.get(i).getName());
}
Scanner scan=new Scanner(System.in);
int num=0;
System.out.println("Enter a number to get item: ");
if(scan.hasNextInt()) {
num=scan.nextInt();
}
scan.close();
if(num<=listItems.size()) {
getinfo(num);
} else {
throw new NoSuchElementException();
}
getinfo(num);
}
public static void getinfo(int num) {
if (listItems.get(num).getQuant() > 0 ) {
System.out.println("You chose " + listItems.get(num).getName());
System.out.println("The price is $" + listItems.get(num).getPrice());
System.out.println("There are " + listItems.get(num).getQuant() + " left");
}
else {
System.out.println("Sold Out, Please buy another item");
showItems();
}
if (listItems.get(num).getPrice()<=money.getInsertmoney()) {
System.out.println("Here your item and balance $" + (money.getInsertmoney()-listItems.get(num).getPrice()));
listItems.get(num).deduct();
money.setTotal(money.getTotal()+ money.getInsertmoney());
System.out.println("---------------------------");
display();
}
else {
System.out.println("Insufficient money. Please insert more coin");
getmoney(money.getInsertmoney());
showItems();
}
}
public static void getmoney(double num) {
Scanner scan=new Scanner(System.in);
double insert =0;
System.out.println("Please insert only Quarter or One Dollar or Press 0 to Restock: ");
if (scan.hasNextDouble()) {
insert=scan.nextDouble();
}
scan.close();
if (insert ==0) {
restock();
}
else {
money.setInsertmoney(insert+num);;
System.out.println("Your money: $" + money.getInsertmoney());
}
}
public static void addingItems() {
Scanner scan=new Scanner(System.in);
System.out.println("Enter the name of item you want to add: ");
String name=scan.nextLine();
System.out.println("Enter quantity: ");
int quantity=scan.nextInt();
System.out.println("Enter price: ");
double price=scan.nextDouble();
listItems.add(new Inventory(name, price, quantity));
System.out.println("Do you want to add more item? Press 0 to add, 1 to collecting money ");
int num=scan.nextInt();
scan.close();
if (num ==0) {
addingItems();
}
else
collectingmoney();
getmoney(0);
showItems();
}
public static void collectingmoney() {
System.out.println("Your total money is: "+ money.getTotal());
Scanner scan=new Scanner(System.in);
System.out.println("Enter number for coin value, 5 for Nickel, 10 for Dime, 25 for Quarter, 100 for one Dollar: ");
String name=scan.nextLine();
System.out.println("Enter quantity: ");
int quantity=scan.nextInt();
System.out.println("Enter price: ");
double price=scan.nextDouble();
listItems.add(new Inventory(name, price, quantity));
System.out.println("Do you want to add more coin? Press 0 to add, 1 to addingItems: ");
int num=scan.nextInt();
scan.close();
if (num ==0) {
collectingmoney();
}
else
addingItems();
getmoney(0);
showItems();
}
public static void restock(){
System.out.println("Input Passwords to add item or to collect or remove money from Storage: ");
Scanner scan=new Scanner(System.in);
int num=scan.nextInt();
scan.close();
//Password is 6789 for adding item, 9876 for removing money;
if (num == 6789) {
addingItems();
}
else if (num == 9876){
collectingmoney();
}
}
}
I have been checking my program, and it did not show any problems. However, when I execute it. It showed my this message.
Welcome to Vending Machine:
Please insert only Quarter or One Dollar or Press 0 to Restock:
1.25
Your money: $1.25
Items are shown below
SNACK
COCA
GUM
Enter a number to get item:
You chose SNACK
The price is $1.25
There are 10 left
Here your item and balance $0.0
---------------------------
Welcome to Vending Machine:
Please insert only Quarter or One Dollar or Press 0 to Restock:
Input Passwords to add item or to collect or remove money from Storage:
Exception in thread "main" java.util.NoSuchElementException
at java.base/java.util.Scanner.throwFor(Scanner.java:937)
at java.base/java.util.Scanner.next(Scanner.java:1594)
at java.base/java.util.Scanner.nextInt(Scanner.java:2258)
at java.base/java.util.Scanner.nextInt(Scanner.java:2212)
at chapter1/vendingmachine.VendingMachine.restock(VendingMachine.java:129)
at chapter1/vendingmachine.VendingMachine.getmoney(VendingMachine.java:78)
at chapter1/vendingmachine.VendingMachine.display(VendingMachine.java:23)
at chapter1/vendingmachine.VendingMachine.getinfo(VendingMachine.java:61)
at chapter1/vendingmachine.VendingMachine.showItems(VendingMachine.java:39)
at chapter1/vendingmachine.VendingMachine.display(VendingMachine.java:24)
at chapter1/vendingmachine.main.main(main.java:5)
I couldnot figure out what that means. Can anyone help me fix my program? Thanks yall!!
