Java Utililty Methods Date Equal

boolean areEqual(Date date1, Date date2)
Compares if two dates are equal up to second resolution.

boolean result = false;
if (date1 == null && date2 == null) {
 result = true;
} else if (date1 == null || date2 == null) {
 result = false;
} else {
 Calendar cal1 = Calendar.getInstance();
 Calendar cal2 = Calendar.getInstance();
...

boolean dateEquals(Date dtFirst, Date dtSecond)
Check if two dates equals regardless of the time.

boolean bReturn;
bReturn = (dtFirst == dtSecond);
if (!bReturn) {
 if (dtFirst == null) {
 bReturn = (dtSecond == null);
 } else {
 if (dtSecond != null) {
 Calendar compCalendar;
...

boolean datesEqualToSecond(Date date1, Date date2)
compares two datess down to the second

Calendar calendar1 = new GregorianCalendar(GMT_TZ);
calendar1.setTime(date1);
Calendar calendar2 = new GregorianCalendar(GMT_TZ);
calendar2.setTime(date2);
if (calendar1.get(Calendar.YEAR) == calendar2.get(Calendar.YEAR)) {
 if (calendar1.get(Calendar.DAY_OF_YEAR) == calendar2.get(Calendar.DAY_OF_YEAR)) {
 if (calendar1.get(Calendar.HOUR) == calendar2.get(Calendar.HOUR)) {
 if (calendar1.get(Calendar.MINUTE) == calendar2.get(Calendar.MINUTE)) {
...

boolean equal(Date date, Date other)
equal

Calendar c1 = new GregorianCalendar(TimeZone.getTimeZone("UTC"));
c1.setTime(date);
Calendar c2 = new GregorianCalendar(TimeZone.getTimeZone("UTC"));
c2.setTime(other);
return c1.getTimeInMillis() == c2.getTimeInMillis();

int equalDateByDay(Date date1, Date date2)
This is function equalDateByDay Version: 1.0 History: DATE AUTHOR DESCRIPTION ------------------------------------------------- 10-April-2013 Nam Dinh Create new

Calendar cal1 = Calendar.getInstance();
cal1.setTime(date1);
Calendar cal2 = Calendar.getInstance();
cal2.setTime(date2);
if (cal1.get(Calendar.YEAR) > cal2.get(Calendar.YEAR)) {
 return 1;
} else if (cal1.get(Calendar.YEAR) < cal2.get(Calendar.YEAR)) {
 return -1;
...

boolean equalDates(Date first, Date second)
Checks if year, month, date of two Date objects match.

Calendar calFirst = Calendar.getInstance();
Calendar calSecond = Calendar.getInstance();
calFirst.setTime(first);
calSecond.setTime(second);
return calFirst.get(Calendar.YEAR) == calSecond.get(Calendar.YEAR)
 && calFirst.get(Calendar.MONTH) == calSecond.get(Calendar.MONTH)
 && calFirst.get(Calendar.DAY_OF_MONTH) == calSecond.get(Calendar.DAY_OF_MONTH);

boolean equalsIgnoreTime(final Date d1, final Date d2)

Two dates are equal if they have the same date (differing time values will be ignored) or if d1 and d2 are both null.

if ((d1 == null) && (d2 == null)) {
 return true;
if (d1 != null && d2 != null) {
 Calendar c1 = Calendar.getInstance();
 c1.setTimeInMillis(d1.getTime());
 Calendar c2 = Calendar.getInstance();
 c2.setTimeInMillis(d2.getTime());
...

boolean equalsToDate(Date date1, Date date2, boolean checkTime)
equals To Date

Calendar cal = Calendar.getInstance();
cal.setTime(date1);
int date1Year = cal.get(Calendar.YEAR);
int date1Month = cal.get(Calendar.MONTH) + 1;
int date1Day = cal.get(Calendar.DATE);
int date1Hour = cal.get(Calendar.HOUR);
int date1Minute = cal.get(Calendar.MINUTE);
cal.setTime(date2);
...

boolean equalsWoTime(final Date date1, final Date date2)
equals Wo Time

return getZeroTimeDate(date1).equals(getZeroTimeDate(date2));

boolean firstLessOrEqualSecond(Date firstDate, Date secondDate)
first Less Or Equal Second

Calendar firstCalendarDate = Calendar.getInstance();
firstCalendarDate.setTime(firstDate);
Calendar secondCalendarDate = Calendar.getInstance();
secondCalendarDate.setTime(secondDate);
firstCalendarDate.set(Calendar.DAY_OF_MONTH, 1);
return firstCalendarDate.compareTo(secondCalendarDate) <= 0;