Generate random unix timestamp

Question

How I can generate random unix timestamp in specific times. For example get random unix time mean between today and tomorrow.

maybe you can find something useful here: http://stackoverflow.com/questions/363681/java-generating-random-number-in-a-range — rosco, Jun 08 '12 at 15:01

Hari Menon · Answer 1 · 2012-06-08T15:16:17.257

3

long randomEpoch = epoch1 + Math.abs(new Random().nextLong()) % (epoch2-epoch1);

where epoch1 and epoch2 are the two times.

edited Jun 08 '12 at 15:16

answered Jun 08 '12 at 15:07

Hari Menon

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very good! I did: new Date(Math.abs(new Random().nextLong()) % new Date().getTime()) to get a random date between 1/1/1970 to today – ademar111190 Jan 02 '13 at 06:28

score 1 · Answer 2 · answered Jun 08 '12 at 15:00

1

Get the needed range by generating two timestamps. Subtract the difference (absolute value). Get a random number between 0 and 1. Multiply the difference by the random number. Add the result to the earlier timestmap.

answered Jun 08 '12 at 15:00

jn1kk

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score 0 · Answer 3 · answered Jun 08 '12 at 15:06

0

This code specifically gets a random time between today and tomorrow.

public Date randTime(){
    Date now = new Date();
    Date today = new Date(now.getFullYear(), now.getMonth(), now.getDay(), 0, 0, 0, 0);
    return new Date(today.getTime() + (long)(Math.random() * 86400000));
}

answered Jun 08 '12 at 15:06

Hans Z

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I think you mean `(long)(Math.random() * 86400000)` – Bohemian Jun 08 '12 at 15:09
Indeed. milliseconds, not seconds XD – Hans Z Jun 08 '12 at 15:11

Generate random unix timestamp

3 Answers3