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Long.MAX_VALUE - System.currentTimeMillis()

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Top Forums Shell Programming and Scripting Long.MAX_VALUE - System.currentTimeMillis()
# 1  
Old 03-17-2014
Debian Long.MAX_VALUE - System.currentTimeMillis()
How can i get Long.MAX_VALUE - System.currentTimeMillis() ( in Java ) In Unix.

date %s is not the timpstamp in millis.

Also is it possible if we can System.currentTimeMillis() equivalent of
yesterday's 23:59:59 in millis ?
# 2  
Old 03-17-2014
What version of unix are you running this on?

Is date +%s.%N supported?

Some unix versions allow date +%s%-03N and echo $(( $(date -d "0:0" +%s) - 1 ))999


If you have perl you could also try:

Code:
perl -le 'use Time::HiRes gettimeofday; ($s,$m)=gettimeofday; printf "%d%03d\n",$s,$m/1000'

and
Code:
perl -le '@t=localtime();print time - $t[2] *3600 - $t[1]*60 - $t[0] - 1,"999\n"'

Last edited by Chubler_XL; 03-17-2014 at 11:56 PM..
# 3  
Old 03-18-2014
%N gives in NANO second , not in millis.
also how can i get yesterday's date and time in millis
# 4  
Old 03-18-2014
Nano -> Milisecond is just a matter of rounding. 2nd part of each example is yesterday's ms value. Please try my solution.
Last edited by Chubler_XL; 03-18-2014 at 06:30 AM..
# 5  
Old 03-18-2014
Quote:
Originally Posted by mohapatra
also how can i get yesterday's date and time in millis
Again, what is your system? Methods for date math can vary wildly from system to system.
# 6  
Old 03-18-2014
Bash shell. It shoudlnt depend on the flavour of unix.
# 7  
Old 03-20-2014
Quote:
Originally Posted by mohapatra
Bash shell. It shoudlnt depend on the flavour of unix.
Unfortunately it does. About the only portable way to do date math in UNIX is perl -- and standard Perl routines don't have millisecond accuracy.
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