System time

System time
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Output the system time (any units will do as long as they are noted) either by a system command or one built into the language. The system time can be used for debugging, network information, random number seeds, or something as simple as program performance.

BASIC

Interpreter: QuickBasic 4.5

This shows the system time in POSIX time.

PRINT TIMER

Forth

Forth's only standard access to the system timers is via DATE&TIME ( -- s m h D M Y ) and MS ( n -- ) which pauses the program for at least n milliseconds. Particular Forth implementations give different access to millisecond and microsecond timers:

Interpreters: Win32Forth, GNU Forth, bigFORTH, iForth, PFE, SwiftForth, VFX Forth, MacForth

[UNDEFINED] MS@ [IF]                                   \ Win32Forth (rolls over daily)
 [DEFINED] ?MS [IF] ( -- ms )
   : ms@ ?MS ;                                         \ iForth
 [ELSE] [DEFINED] cputime [IF] ( -- Dusec )
   : ms@ cputime d+ 1000 um/mod nip ;                  \ gforth: Anton Ertl
 [ELSE] [DEFINED] timer@ [IF] ( -- Dusec )
   : ms@ timer@ >us 1000 um/mod nip ;                  \ bigForth
 [ELSE] [DEFINED] gettimeofday [IF] ( -- usec sec )
   : ms@ gettimeofday 1000 MOD 1000 * SWAP 1000 / + ;  \ PFE
 [ELSE] [DEFINED] counter [IF]
   : ms@ counter ;                                     \ SwiftForth
 [ELSE] [DEFINED] GetTickCount [IF]
   : ms@ GetTickCount ;                                \ VFX Forth
 [ELSE] [DEFINED] MICROSECS [IF]
   : ms@  microsecs 1000 UM/MOD nip ;                  \  MacForth
[THEN] [THEN] [THEN] [THEN] [THEN] [THEN] [THEN]

MS@ .   \ print millisecond counter

J

The external verb 6!:0 returns a six-element floating-point array in which the elements correspond to year, month, day, hour, minute, and second. Fractional portion of second is accurate to thousandths.

   6!:0 ''

Java

This shows the system time in POSIX time.

import java.util.Date;

public class SystemTime{
   public static void main(String[] args){
      Date now = new Date();
      System.out.println(now.getTime());
   }
}

Other methods are available in the Date object such as: getDay(), getHours(), getMinutes(), getSeconds(), getYear(), etc.

See Also

Date format

Retrieving system time (wiki)