Month.java

package sk.iway.iwcm.calendar;

import java.util.Calendar;
import java.util.Date;

public class Month {
    private Calendar calendar;

    public Month(int year, int month) {
        calendar = Calendar.getInstance();
        calendar.set(year, month, 1);
    }

    public Date getStartDate() {
        calendar.set(Calendar.DAY_OF_MONTH, calendar.getActualMinimum(Calendar.DAY_OF_MONTH));

        return getBeginOfDate(calendar.getTime());
    }

    public Date getEndDate() {
        calendar.set(Calendar.DAY_OF_MONTH, calendar.getActualMaximum(Calendar.DAY_OF_MONTH));

        return getEndOfDay(calendar.getTime());
    }

    public static Date getBeginOfDate(Date date)
    {
        Calendar calendar = Calendar.getInstance();
        calendar.setTime(date);
        calendar.set(Calendar.HOUR_OF_DAY, 0);
        calendar.set(Calendar.MINUTE, 0);
        calendar.set(Calendar.SECOND, 0);
        calendar.set(Calendar.MILLISECOND, 0);

        return calendar.getTime();
    }

    public static Date getEndOfDay(Date date)
    {
        Calendar calendar = Calendar.getInstance();
        calendar.setTime(date);
        calendar.set(Calendar.HOUR_OF_DAY, 23);
        calendar.set(Calendar.MINUTE, 59);
        calendar.set(Calendar.SECOND, 59);
        calendar.set(Calendar.MILLISECOND, 999);

        return calendar.getTime();
    }
}