Java Utililty Methods Date Compare by Day

List of utility methods to do Date Compare by Day

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Description

The list of methods to do Date Compare by Day are organized into topic(s).

Method

booleanisSameDay(Date a, Date b)
is Same Day 
a = truncDate(a);
b = truncDate(b);
return equals(a, b);
booleanisSameDay(Date a, Date b)
is Same Day 
Date normDateA = dateStart(a);
Date normDateB = dateStart(b);
return normDateA.equals(normDateB);
booleanisSameDay(Date d1, Date d2)
is Same Day 
if (d1 != null && d2 != null) {
    Calendar c1 = Calendar.getInstance();
    c1.setTime(d1);
    int n1 = c1.get(Calendar.DAY_OF_YEAR) + c1.get(Calendar.YEAR);
    c1.setTime(d2);
    int n2 = c1.get(Calendar.DAY_OF_YEAR) + c1.get(Calendar.YEAR);
    return n1 == n2;
return false;
booleanisSameDay(Date d1, Date d2)
Compares two dates. 
calendar1.setTime(d1);
calendar2.setTime(d2);
return isSameDay();
booleanisSameDay(Date d1, Date d2)
is Same Day 
return getDateWithoutTimePart(d1).compareTo(getDateWithoutTimePart(d2)) == 0;
booleanisSameDay(Date date)
is Same Day 
Calendar calendar = Calendar.getInstance();
Calendar startCalendar = Calendar.getInstance();
startCalendar.setTime(date);
return calendar.get(Calendar.DATE) == startCalendar.get(Calendar.DATE);
booleanisSameDay(Date date1, Date date2)
is Same Day 
if (date1 == null && date2 == null) {
    return true;
if (date1 == null || date2 == null) {
    return false;
Calendar cal1 = getCalendar(getDate(date1));
Calendar cal2 = getCalendar(getDate(date2));
...
booleanisSameDay(Date date1, Date date2)
is Same Day 
if (date1 == null && date2 == null)
    return true;
if (date1 == null || date2 == null)
    return false;
Calendar cal1 = GregorianCalendar.getInstance();
cal1.setTime(date1);
Calendar cal2 = GregorianCalendar.getInstance();
cal2.setTime(date2);
...
booleanisSameDay(Date date1, Date date2)

Checks if two date objects are on the same day ignoring time.

28 Mar 2002 13:45 and 28 Mar 2002 06:01 would return true. 

if (date1 == null || date2 == null) {
    throw new IllegalArgumentException("The date must not be null");
Calendar cal1 = Calendar.getInstance();
cal1.setTime(date1);
Calendar cal2 = Calendar.getInstance();
cal2.setTime(date2);
return isSameDay(cal1, cal2);
...
booleanisSameDay(Date day1, Date day2)
Checks if it is the same day in both dates 
if (day1 == null || day1 == null) {
    throw new IllegalArgumentException("The date must not be null");
Calendar cal1 = Calendar.getInstance();
cal1.setTime(day1);
Calendar cal2 = Calendar.getInstance();
cal1.setTime(day2);
return (cal1.get(Calendar.ERA) == cal2.get(Calendar.ERA)
...