Compare dates ignoring milliseconds?

Question

Is there a way to compare two calendar objects, but ignore milliseconds?

I have written a test case that compared two calendar objects, but there is a p

Answer 1

If you are on Java 8, you can use the Java Time API, specifically Calendar::toInstant(), followed by Instant::truncatedTo(). Specify the granularity of truncation using ChronoUnit enum.

myCalendar.toInstant().truncatedTo( ChronoUnit.SECONDS )  // Lop off any fractional second.

Example.

    Calendar oneMonthIsh = Calendar.getInstance();
    oneMonthIsh.add(Calendar.MONTH, -1);
    oneMonthIsh.add(Calendar.MINUTE, 1);

    assertNotEquals(oneMonthIsh.toInstant(), getExpectedOneMonthDateFromCurrentDate());
    assertEquals(oneMonthIsh.toInstant().truncatedTo(ChronoUnit.DAYS),getExpectedOneMonthDateFromCurrentDate().toInstant()
    .truncatedTo(ChronoUnit.DAYS));