Java Calendar Day isWithinDaysFuture(Calendar cal, int days)

Description

Checks if a calendar date is after today and within a number of days in the future.

License

Open Source License

Parameter

Parameter	Description
cal	the calendar, not altered, not null
days	the number of days.

Exception

Parameter	Description
IllegalArgumentException	if the calendar is <code>null</code>

Return

true if the calendar date day is after today and within days in the future .

Declaration

public static boolean isWithinDaysFuture(Calendar cal, int days) 

Method Source Code

//package com.java2s;
//License from project: Open Source License 

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

public class Main {
    /**//from   w w w.j a  va  2  s  .c o  m
     * <p>
     * Checks if a date is after today and within a number of days in the
     * future.
     * </p>
     * 
     * @param date the date to check, not altered, not null.
     * @param days the number of days.
     * @return true if the date day is after today and within days in the future
     *         .
     * @throws IllegalArgumentException if the date is <code>null</code>
     */
    public static boolean isWithinDaysFuture(Date date, int days) {
        if (date == null) {
            throw new IllegalArgumentException("The date must not be null");
        }
        Calendar cal = Calendar.getInstance();
        cal.setTime(date);
        return isWithinDaysFuture(cal, days);
    }

    /**
     * <p>
     * Checks if a calendar date is after today and within a number of days in
     * the future.
     * </p>
     * 
     * @param cal the calendar, not altered, not null
     * @param days the number of days.
     * @return true if the calendar date day is after today and within days in
     *         the future .
     * @throws IllegalArgumentException if the calendar is <code>null</code>
     */
    public static boolean isWithinDaysFuture(Calendar cal, int days) {
        if (cal == null) {
            throw new IllegalArgumentException("The date must not be null");
        }
        Calendar today = Calendar.getInstance();
        Calendar future = Calendar.getInstance();
        future.add(Calendar.DAY_OF_YEAR, days);
        return (isAfterDay(cal, today) && !isAfterDay(cal, future));
    }

    /**
     * <p>
     * Checks if the first date is after the second date ignoring time.
     * </p>
     * 
     * @param date1 the first date, not altered, not null
     * @param date2 the second date, not altered, not null
     * @return true if the first date day is after the second date day.
     * @throws IllegalArgumentException if the date is <code>null</code>
     */
    public static boolean isAfterDay(Date date1, Date date2) {
        if (date1 == null || date2 == null) {
            throw new IllegalArgumentException("The dates must not be null");
        }
        Calendar cal1 = Calendar.getInstance();
        cal1.setTime(date1);
        Calendar cal2 = Calendar.getInstance();
        cal2.setTime(date2);
        return isAfterDay(cal1, cal2);
    }

    /**
     * <p>
     * Checks if the first calendar date is after the second calendar date
     * ignoring time.
     * </p>
     * 
     * @param cal1 the first calendar, not altered, not null.
     * @param cal2 the second calendar, not altered, not null.
     * @return true if cal1 date is after cal2 date ignoring time.
     * @throws IllegalArgumentException if either of the calendars are
     *             <code>null</code>
     */
    public static boolean isAfterDay(Calendar cal1, Calendar cal2) {
        if (cal1 == null || cal2 == null) {
            throw new IllegalArgumentException("The dates must not be null");
        }
        if (cal1.get(Calendar.ERA) < cal2.get(Calendar.ERA))
            return false;
        if (cal1.get(Calendar.ERA) > cal2.get(Calendar.ERA))
            return true;
        if (cal1.get(Calendar.YEAR) < cal2.get(Calendar.YEAR))
            return false;
        if (cal1.get(Calendar.YEAR) > cal2.get(Calendar.YEAR))
            return true;
        return cal1.get(Calendar.DAY_OF_YEAR) > cal2.get(Calendar.DAY_OF_YEAR);
    }
}

Related

1. isTheSameDay(Calendar dayOne, Calendar dayTwo)
2. isToday(Calendar creationDate)
3. isToday(Calendar date)
4. isToday(Calendar now, Calendar then)
5. isTodayOff(String days, Calendar calendar)
6. julianDay(Calendar calendar)
7. minOfDay(Calendar calendar)
8. moveToCalendarDay(Calendar cal, int day)
9. moveToCalendarDayJust(Calendar cal)