Bot program to count the products bought in the supermarket. with total sum.

package com.company;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        ArrayList<String> products = new ArrayList<>(Arrays.asList("banana", "apple", "orange", "pineapple", "kiwi", "grapefruit"));
        System.out.println("Welcome to the market");

        Scanner market = new Scanner(System.in);
        int totalSum = 0;
        while (true) {
            System.out.println("enter the products that you want to buy");
            String product = market.nextLine();
            if (!products.contains(product)) {
                System.out.println("we don't have " + product);
                continue;
            }
            System.out.println("how many " + product + " do you want to buy");
            int quantity = market.nextInt();
            totalSum += quantity;
            market.nextLine();

            System.out.