Java 8 LocalDate - How do I get all dates between two dates?

Question

Is there a usablility to get all dates between two dates in the new java.time API?

Let\'s say I have this part of code:

Answer 1

Assuming you mainly want to iterate over the date range, it would make sense to create a DateRange class that is iterable. That would allow you to write:

for (LocalDate d : DateRange.between(startDate, endDate)) ...

Something like:

public class DateRange implements Iterable {

  private final LocalDate startDate;
  private final LocalDate endDate;

  public DateRange(LocalDate startDate, LocalDate endDate) {
    //check that range is valid (null, start < end)
    this.startDate = startDate;
    this.endDate = endDate;
  }

  @Override
  public Iterator iterator() {
    return stream().iterator();
  }

  public Stream stream() {
    return Stream.iterate(startDate, d -> d.plusDays(1))
                 .limit(ChronoUnit.DAYS.between(startDate, endDate) + 1);
  }

  public List toList() { //could also be built from the stream() method
    List dates = new ArrayList<> ();
    for (LocalDate d = startDate; !d.isAfter(endDate); d = d.plusDays(1)) {
      dates.add(d);
    }
    return dates;
  }
}

It would make sense to add equals & hashcode methods, getters, maybe have a static factory + private constructor to match the coding style of the Java time API etc.