Check if time (startdate & enddate) cuts a time period

Question

How can I check if a given startdate & enddate cuts a specific time period (train time).

I did following:

if ((startdate >= train.getStartDate()) &&
 (enddate <= train.getEndDate())) {
   // doSomething();
}

doSomething() get only executed, when the time is exact between the given time period. But I want also that doSomething() get executed, when the times are overlapped.

For example:

Startdate: 14.10.2015 15.00
Enddate: 16.10.2015 17.00
Timeperiod: 15.10.2015 10.00 - 19.10.2015 10.00

In this case its overlapping and I want that doSomething() get executed. Any solutions?

`java.util.Date` has `.before` and `.after`, `DateTime` has `.isBefore` and `.isAfter`, and they both have a concept for equality — MadProgrammer, Oct 14 '15 at 09:23

F. Knorr · Accepted Answer · 2015-10-14T12:02:38.603

0

If you want to stick with long-values, I would do the following

if (!((train.getEndDate() < startdate) || (train.getStartDate() > enddate))) {...}

Alternatively, you might want to convert your long-vales to java.util.Date (new Date(long value)) so that you can use the Date-class.

There is also the very nice Joda time 2.2 API which has an Interval-class that provides the following function

overlap(ReadableInterval interval)
      Gets the overlap between this interval and another interval.

edited Oct 14 '15 at 12:02

answered Oct 14 '15 at 09:37

F. Knorr

3,045
15
22

Thanks you very much, this saved my day. When I have more time, im gonna try Joda time. – Matej Oct 14 '15 at 09:42
Sorry, but I noticed that the if conditions doesnt work proper, could you please check if ur condition have any mistake? – Matej Oct 14 '15 at 10:14
Can you give an example for which the condition does not work? – F. Knorr Oct 14 '15 at 11:09
When startdate & enddate is before the timeperiod, then it's executing, but It should not. – Matej Oct 14 '15 at 11:21
I also noticed that you have some bracket mistake. – Matej Oct 14 '15 at 11:22
Works now. Shoud be : if (!((train.getEndDate() < startdate) || (train.getStartDate() > enddate))) – Matej Oct 14 '15 at 11:26

score 0 · Answer 2 · answered Oct 14 '15 at 09:43

0

Date has after and before methods

    if (yourDate.after(startDate) && yourDate.before(endDate)) {
        //doSomething
    }

answered Oct 14 '15 at 09:43

Saravana

12,647
2
39
57

score 0 · Answer 3 · answered Oct 14 '15 at 09:56

You could try with Guava Ranges too. Here is an example:

public class RangesTest {

SimpleDateFormat sdf = new SimpleDateFormat("dd.MM.yyyy HH.mm");

@Test
public void testDateRange() throws ParseException {
    Range<Date> timePeriod = createClosedDateRange("15.10.2015 10.00","19.10.2015 10.00");

    assertTrue(timePeriod.isConnected(createClosedDateRange("14.10.2015 15.00", "16.10.2015 17.00")));
    assertTrue(timePeriod.isConnected(createClosedDateRange("14.10.2015 15.00", "20.10.2015 17.00")));
    assertFalse(timePeriod.isConnected(createClosedDateRange("14.10.2015 15.00", "15.10.2015 09.59")));
    assertFalse(timePeriod.isConnected(createClosedDateRange("20.10.2015 17.01", "21.10.2015 17.00")));
}

private Range<Date> createClosedDateRange(String startDate, String endDate) throws ParseException {
    Date startdate= sdf.parse(startDate);
    Date enddate = sdf.parse(endDate);
    return Range.closed(startdate, enddate);
}

}

Check if time (startdate & enddate) cuts a time period

3 Answers3