Rounding a time in milliseconds to nearest minute?


I am getting the current time like:

    now = System.currentTimeMillis();

I want to find the closest minute, 5 minutes from now, with ceil():

    now = 10:45:12
    +5min = 10:50:12
    +5minAndCeil = 10:51:00

So getting the +5min time is simple:

    now = System.currentTimeMillis();
    +5min = now + (60 * 1000 * 5);

But are there any good methods of rounding that number up to the closest minute?

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Mick BarryJava DeveloperCommented:
How is ceil() not working for you?

you can also use BigDecimal to control how the rounding is done

alternatively you could use the calendar class to clear seconds and add one minute
Mick BarryJava DeveloperCommented:
to use ceil() you should just need to first convert it to minutes ( / 60000)

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try this :
static final long MILLISECONDS_PER_MINUTE = 60 * 1000L;
If (msRem < 1000) now = now - msRem; else now = now - msRem + MILLISECONDS_PER_MINUTE;
Try the following (where 'nowPlusFive'  is type Date and 'ONE_MIN' is defined as 1 * 60 * 1000)
Date newD = new Date((nowPlusFive.getTime() + ONE_MIN) / ONE_MIN * ONE_MIN);

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