AdAstra

import java.util.Scanner;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class AdAstra {

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        String regexFoodCalories = "(?<Separator>[\\|#]+)(?<ItemName>[A-Za-z\\s]+)(\\1)(?<ExpirationDate>\\d{2}/\\d{2}/\\d{2})(\\1)(?<Calories>\\d+)(\\1)";

        String itemName = "ItemName";
        String expirationDate = "ExpirationDate";
        String calories = "Calories";

        String input = scanner.nextLine();

        int dailyCaloriesNeeded = 2000;
        int totalCaloriesPacked = 0;

        Pattern patternCalories = Pattern.compile(regexFoodCalories);
        Matcher matcherCalories = patternCalories.matcher(input);

        while (matcherCalories.find()) {
            String currentItemName =  matcherCalories.group(itemName);
            String currentExpirationDate =  matcherCalories.group(expirationDate);
            String currentCalories =  matcherCalories.group(calories);
            totalCaloriesPacked += Integer.parseInt(currentCalories);
        }

        System.out.printf("You have food to last you for: %d days!\n", totalCaloriesPacked / dailyCaloriesNeeded);

        Pattern patternFood = Pattern.compile(regexFoodCalories);
        Matcher matcherFood = patternFood.matcher(input);

        while (matcherFood.find()) {
            String currentItemName = matcherFood.group(itemName);
            String currentExpirationDate = matcherFood.group(expirationDate);
            String currentCalories =  matcherFood.group(calories);
            System.out.printf("Item: %s, Best before: %s, Nutrition: %s\n", currentItemName, currentExpirationDate, currentCalories);
        }
    }
}