Main.java

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import java.io.*;
 
public class Main {
 
    public static void main(String[] args) throws IOException {
        BufferedReader input = new BufferedReader(new InputStreamReader(System.in));
        String inputLine = "";
 
        VendingMachine v = new VendingMachine();
 
        // Adds products to the vending machine
        v.addProduct(new Product("Cocacola", 4, 1)); // Price: $4, Quantity: 1
        v.addProduct(new Product("Pepsi", 5, 3)); // Price: $5, Quantity: 3
 
        System.out.println("Welcome to COMP2396B Assignment 3 - Vending Machine");
 
        // Reads user inputs continuously
        while (true) {
            inputLine = input.readLine();
 
            // Split the input line
            String[] cmdParts = inputLine.split(" ");
 
            Command cmdObj = null;
 
            if (cmdParts[0].equalsIgnoreCase("Exit")) {
                break;
            } else if (cmdParts[0].equalsIgnoreCase("Check")) {
                cmdObj = new CmdCheckProductInfo();
            } else if (cmdParts[0].equalsIgnoreCase("Insert")) {
                cmdObj = new CmdInsertCoin();
            } else if (cmdParts[0].equalsIgnoreCase("Reject")) {
                cmdObj = new CmdRejectCoins();
            } else if (cmdParts[0].equalsIgnoreCase("Buy")) {
                cmdObj = new CmdPurchase();
            } else {
                System.out.println("Unknown user command.");
            }
 
            if (cmdObj != null) {
                System.out.println(cmdObj.execute(v, cmdParts));
            }
 
            inputLine = "";
        }
 
        System.out.println("Bye");
    }
}