SoftUni Coffee Orders

package exams.june2016;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.math.BigDecimal;
import java.util.Arrays;
import java.util.Calendar;
import java.util.GregorianCalendar;

public class P02_SoftUniCoffeeOrders {
    public static void main(String[] args) throws IOException {
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));

        int n = Integer.parseInt(reader.readLine());

        //double allPrices = 0;
        BigDecimal allPrices = new BigDecimal("0.0");
        for (int i = 0; i < n; i++) {
            BigDecimal priceCoffee = new BigDecimal(reader.readLine());
            int[] date = Arrays.stream(reader.readLine().split("/"))
                    .mapToInt(Integer::parseInt)
                    .toArray();
            long countCoffee = Long.parseLong(reader.readLine());

            int day = date[0];
//            int month = date[1] - 1;
            int month = date[1];
            int year = date[2];

//            Calendar myCal = new GregorianCalendar(year, month, day);
//            int daysInMonth = myCal.getActualMaximum(Calendar.DAY_OF_MONTH);
            int daysInMonth = getDays(month, year);
            //double priceMonthCoffee = (daysInMonth * countCoffee) * priceCoffee;
            long coffeeForMonth = daysInMonth * countCoffee;
            BigDecimal coffeeForMonthBig = new BigDecimal(coffeeForMonth);
            BigDecimal priceMonthCoffee = coffeeForMonthBig.multiply(priceCoffee);
            System.out.printf("The price for the coffee is: $%.2f%n", priceMonthCoffee);
            //allPrices = allPrices + priceMonthCoffee;
            allPrices = allPrices.add(priceMonthCoffee);

        }
        System.out.printf("Total: $%.2f", allPrices);
    }
    public static int getDays (int month, int year) {

        int numberOfDays = 0;
        switch (month) {
            case 1:
                numberOfDays = 31;
                break;
            case 2:
                if ((year % 400 == 0) || ((year % 4 == 0) && (year % 100 != 0))) {
                    numberOfDays = 29;
                } else {
                    numberOfDays = 28;
                }
                break;
            case 3:
                numberOfDays = 31;
                break;
            case 4:
                numberOfDays = 30;
                break;
            case 5:
                numberOfDays = 31;
                break;
            case 6:
                numberOfDays = 30;
                break;
            case 7:
                numberOfDays = 31;
                break;
            case 8:
                numberOfDays = 31;
                break;
            case 9:
                numberOfDays = 30;
                break;
            case 10:
                numberOfDays = 31;
                break;
            case 11:
                numberOfDays = 30;
                break;
            case 12:
                numberOfDays = 31;
                break;
        }
        return numberOfDays;
    }
}