Adding seconds to a Calendar object using Calendar.MINUTE add method

Question

Can we pass a long value in Java such that it adds only seconds in the following code:

Calendar calendar= Calendar.getInstance();
calendar.add(Calendar.MINUTE, (int) **SomeLongValue**);

Where SomeLongValue adds only seconds to the calendar object.

I cannot change the code. I have to pass a long value and increase calendar only by seconds.

Adding minutes will add `SomeLongValue * 60` seconds, by definition, yes... What's the issue? — OneCricketeer, Mar 08 '18 at 14:09
What are you trying to achieve? Why do you want to do this? This sounds like [the XY problem](https://meta.stackexchange.com/questions/66377/what-is-the-xy-problem). — Elliott Frisch, Mar 08 '18 at 14:11
@cricket_007 I cannot change the code. I have to pass a long value and increase calendar only by seconds — Palak, Mar 08 '18 at 14:20
Okay, well, I don't think you can add a fraction of a minute — OneCricketeer, Mar 08 '18 at 14:27
@cricket_007 yes thats right. Thats why I am here.. so is this impossible to do so? — Palak, Mar 08 '18 at 14:45
As stated, you are adding seconds... Just in multiples of 60 — OneCricketeer, Mar 08 '18 at 14:47

score 1 · Answer 1 · answered Mar 08 '18 at 14:13

1

I think you want to achieve below:

Calendar calendar= Calendar.getInstance();
calendar.setTimeInMillis(calendar.getTimeInMillis() + (someLongValueInSec * 1000));

answered Mar 08 '18 at 14:13

Maciej

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`calendar.add(Calendar.SECOND` should work fine, by the way – OneCricketeer Mar 08 '18 at 14:16

OneCricketeer · Answer 2 · 2018-03-08T14:30:18.553

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I'm going to say no, you cannot add only seconds. You're adding minutes, and an integer must be a whole number. Therefore, the least amount of seconds you can add given that code is 60 seconds.

I would suggest using Calendar.SECONDS if that's the time unit you actually want to use

I also would suggest using a LocalDateTime rather than a Calendar. It has a plusSeconds(long seconds) method

edited Mar 08 '18 at 14:30

answered Mar 08 '18 at 14:15

OneCricketeer

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If using `ZonedDateTime` or `LocalDateTime` from java.time (certainly recommended) you could obtain great flexibility by using the `add(Duration)` method. That would allow the client to pass `Duration.ofMinutes(240)`, `Duration.ofSeconds(45)` and all thinkable combinations of different time units. PS In the code in the question you can add 0 seconds and even -60 seconds and less; not that it helps the OP. – Ole V.V. Mar 09 '18 at 08:53

Adding seconds to a Calendar object using Calendar.MINUTE add method

2 Answers2