Introductory Java Array Vending Machine Question

Question

Hello, I am working on the introductory java course, I have progressed to the vending machine array question and I am having trouble passing it. I wrote my own code which I thought should have worked , but It was not giving any output, so I checked the solution and changed my code accordingly. Still didn't pass the questions with no outputs. At this point I tried writing the code in a multitude of ways and checked my notes to make sure I wasnt making any small errors like a missing ; or a misspelled command but I could not get the code to give any outputs. At this point I copied the solution word for word, character for character because I understood the underlying concept which was good enough for me. And even when I copied the solution the code didnt pass.

Can somebody please give me something I can copy and paste that will pass this question? I understand the underlying concept and I would like to continue with my course. The question is the following:

You are making a program for a vending machine that provides drinks.

The menu of the drinks is stored in an array called menu:

String[] menu = {"Tea", "Espresso", "Americano", "Water", "Hot Chocolate"};
JAVA
Take the choice of the customer as an integer from input and output the corresponding menu item.

Also, check for errors: in case the input is out of the range of the array, output "Invalid".

Any help is greatly appreciated, Thank you!

Answer 1

if( choice < 0 || choice > 4 ) { // correct way

Answer 2

Share your tried code here so that it helps to find where is going wrong..?

Answer 3

import java.util.Scanner;

public class Program {
public static void main(String[] args) {
String[] menu = {"Tea", "Espresso", "Americano", "Water", "Hot Chocolate"};
Scanner sc = new Scanner(System.in);
int choice = sc.nextInt();

if (choice < 0 || choice > 4) {
System.out.println("Invalid");
} else {
System.out.println(menu[choice]);
}
}
}

Answer 4

Hello Jaya thank you for the reply, here is the code I have
import java.util.Scanner;

public class Program {
public static void main(String[] args) {
String[] menu = {"Tea", "Espresso", "Americano", "Water", "Hot Chocolate"};
Scanner sc = new Scanner(System.in);
int choice = sc.nextInt();

if (choice < 0 || > 4){
System.out.println("Invalid");
}
else{
System.out.println(menu[choice]);

}

}

}

Answer 5

here's the answer

import java.util.Scanner;

public class Program {
public static void main(String[] args) {
String[] menu = {"Tea", "Espresso", "Americano", "Water", "Hot Chocolate"};
Scanner sc = new Scanner(System.in);
int choice = sc.nextInt();

if (choice < 0 || choice > 4) {
System.out.println("Invalid");
} else {
System.out.println(menu[choice]);
}
}
}

Answer 6

And I decided to buy a coffee machine, it would be much easier than trying to program something. I was lucky enough to find the https://connectvending.co.uk/coffee-machines/office-coffee-machines/rex-royal-s2/ Rex Royal S2 here and learn as much as I could about it. It really is a very high quality machine. So I can safely recommend it for you as well. I hope it was useful and was able to help.