I am writing an app that needs to be quite accurate in dates and I wonder how can I compare LocalDate instances.. for now I was using something like:
LocalDate localdate1 = LocalDate().now(); LocalDate localdate2 = someService.getSomeDate(); localdate1.equals(localdate2);
But I noticed that my app is giving me some confusing results, and I think it is because of the date comparing.
I am thinking about obtaining the time from 1970' in long and compare those two, but I must be easier, I am sure of it
getDays() + " days " + time[0] + " hours " + time[1] + " minutes " + time[2] + " seconds.");
2 Answers. Show activity on this post. LocalDate in fact implements Comparable<ChronoLocalDate> as well as ChronoLocalDate and by implementing those two, every instance of it is of course comparable to another LocalDate instance. You can have a look at the JavaDocs for LocalDate on Oracle's website.
Using equals()
LocalDate
does override equals:
int compareTo0(LocalDate otherDate) { int cmp = (year - otherDate.year); if (cmp == 0) { cmp = (month - otherDate.month); if (cmp == 0) { cmp = (day - otherDate.day); } } return cmp; }
If you are not happy with the result of equals()
, you are good using the predefined methods of LocalDate
.
isAfter()
isBefore()
isEqual()
Notice that all of those method are using the compareTo0()
method and just check the cmp
value. if you are still getting weird result (which you shouldn't), please attach an example of input and output
LocalDate ld ....; LocalDateTime ldtime ...; ld.isEqual(LocalDate.from(ldtime));
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