Getting current date in milliseconds (UTC) (NO use of strings)
This is an old question but for the sake of the new visitors here is THE CORRECT ANSWER: Date.now(); It returns the number of milliseconds elapsed since 1 January 1970 00:00:00 UTC
milliseconds
Which one is recommended: Instant.now().toEpochMilli() or System.currentTimeMillis()
Both are fine. And neither is recommended except for a minority of purposes. What do you need milliseconds since the epoch for? In Java, we can have many different ways to get the current timestamp, For current timestamp just use Instant.now(). No need to convert to milliseconds. Many methods from the first years of Java, … Read more
How can I get the current milliseconds from the current time
Do you mean? long millis = System.currentTimeMillis() % 1000; BTW Windows doesn’t allow timetravel to 1969 C:\> date Enter the new date: (dd-mm-yy) 2/8/1969 The system cannot accept the date entered.
How to convert milliseconds to seconds with precision
Surely you just need: double seconds = milliseconds / 1000.0; There’s no need to manually do the two parts separately – you just need floating point arithmetic, which the use of 1000.0 (as a double literal) forces. (I’m assuming your milliseconds value is an integer of some form.) Note that as usual with double, you … Read more
Java date parsing with microsecond or nanosecond accuracy
tl;dr LocalDateTime.parse( // With resolution of nanoseconds, represent the idea of a date and time somewhere, unspecified. Does *not* represent a moment, is *not* a point on the timeline. To determine an actual moment, place this date+time into context of a time zone (apply a `ZoneId` to get a `ZonedDateTime`). “2015-05-09 00:10:23.999750900” // A `String` … Read more
Get milliseconds until midnight
Use a Calendar to compute it : Calendar c = Calendar.getInstance(); c.add(Calendar.DAY_OF_MONTH, 1); c.set(Calendar.HOUR_OF_DAY, 0); c.set(Calendar.MINUTE, 0); c.set(Calendar.SECOND, 0); c.set(Calendar.MILLISECOND, 0); long howMany = (c.getTimeInMillis()-System.currentTimeMillis());
Conversion of nanoseconds to milliseconds and nanoseconds < 999999 in Java
For an ever shorter conversion using java.util.concurrent.TimeUnit, equivalent to what Shawn wrote above, you can use: long durationInMs = TimeUnit.NANOSECONDS.toMillis(delayNS);
H2 database string to timestamp
According to my test, with H2 version 1.3.170, the milliseconds are not actually zero, but 069: select * from test; ID DATE 1 2012-09-17 18:47:52.069 The same happens if you run: call parsedatetime(’17-09-2012 18:47:52.69′, ‘dd-MM-yyyy hh:mm:ss.SS’); If you add a zero then it works: call parsedatetime(’17-09-2012 18:47:52.690′, ‘dd-MM-yyyy hh:mm:ss.SS’); H2 internally uses java.text.SimpleDateFormat, so it … Read more
ffmpeg video editing command in milliseconds timestamp
you can try: ffmpeg -i a.ogg -ss 00:01:02.500 -t 00:01:03.250 -c copy x2.ogg Timestamps need to be in HH:MM:SS.xxx format for advanced precision (where xxx are milliseconds). Let me know if it works.
new Date(milliseconds) returns Invalid date
You’re not using a number, you’re using a string that looks like a number. According to MDN, when you pass a string into Date, it expects a format recognized by the parse method (IETF-compliant RFC 2822 timestamps). An example of such a string is “December 17, 1995 03:24:00“, but you’re passing in a string that … Read more