Main.java Source code

Introduction

Here is the source code for Main.java

Source

import java.time.DayOfWeek;
import java.time.LocalDate;
import java.time.YearMonth;
import java.util.ArrayList;
import java.util.List;

public class Main {

    public static void main(String[] args) {

        System.out.println(weeksInCalendar(YearMonth.now()));
    }

    public static List<LocalDate> weeksInCalendar(YearMonth month) {
        List<LocalDate> firstDaysOfWeeks = new ArrayList<>();
        for (LocalDate day = firstDayOfCalendar(month); stillInCalendar(month, day); day = day.plusWeeks(1)) {
            firstDaysOfWeeks.add(day);
        }
        return firstDaysOfWeeks;
    }

    private static LocalDate firstDayOfCalendar(YearMonth month) {
        DayOfWeek FIRST_DAY_OF_WEEK = DayOfWeek.MONDAY;
        return month.atDay(1).with(FIRST_DAY_OF_WEEK);
    }

    private static boolean stillInCalendar(YearMonth yearMonth, LocalDate day) {
        return !day.isAfter(yearMonth.atEndOfMonth());
    }
}