Java Date Class Post: 302924424

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Top Forums Programming Java Date Class Post 302924424 by junior-helper on Sunday 9th of November 2014 02:38:12 PM

11-09-2014

Registered User

Integer.parseInt has a funny side effect though. It will convert 000 to 0, 03 to 3 and so on.

Code:

import java.util.Date; // mandatory only for the "current date and time" part

public class prob4
 {
    public static void main(String args[])
    {

    String ArgumentFromCommandLine = "";
    int time = 0;

    // exit program if the supplied argument is not an integer OR
    // if no or too many arguments were supplied
    if (args.length == 1) {
        try {
        ArgumentFromCommandLine = args[0];
            time = Integer.parseInt(ArgumentFromCommandLine);
        } catch (NumberFormatException e) {
            System.err.println("Argument " + args[0] + " must be an integer.");
            System.exit(1);
        }
    }
    else {
        System.err.println("No or too many arguments were supplied.");
            System.exit(1);
    }

    // collect all values
    Long utms = System.currentTimeMillis(); // UNIX time in milliseconds
    Long uts = utms / 1000; // UNIX time in seconds
    Long utd = uts / 86400; // UNIX time in days
    Date dateandtime = new Date(); // Current date and time, default format

    // print requested value
        switch ( time )
    {
        case 0:
            System.out.println("Milliseconds since 1970: " + utms);
            break;
        case 1:
            System.out.println("Seconds since 1970: " + uts);
            break;
        case 2:
            System.out.println("Days since 1970: " + utd);
            break;
        case 3:
            System.out.println("Current date and time: " + dateandtime);
            break;
        default:
            System.out.println("Invalid");
    }

    }

}

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LEARN ABOUT ULTRIX

gettimeofday

gettimeofday(2) 						System Calls Manual						   gettimeofday(2)

Name
       gettimeofday, settimeofday - get or set date and time

Syntax
       #include <sys/time.h>

       gettimeofday(tp, tzp)
       struct timeval *tp;
       struct timezone *tzp;

       settimeofday(tp, tzp)
       struct timeval *tp;
       struct timezone *tzp;

Description
       The  system  call returns the system's notion of the current Greenwich time and the current time zone.  Time returned is expressed relative
       in seconds and microseconds since midnight January 1, 1970.

       The structures pointed to by tp and tzp are defined in <sys/time.h> as:

       struct timeval {
	    long tv_sec;	/* seconds since Jan. 1, 1970 */
	    long tv_usec;  /* and microseconds */
       };

       struct timezone {
	    int  tz_minuteswest;     /* of Greenwich */
	    int  tz_dsttime;	/* type of dst correction to apply */
       };

       The timezone structure indicates the local time zone (measured in minutes of time westward from Greenwich), and a flag  that,  if  nonzero,
       indicates that Daylight Saving time applies locally during the appropriate part of the year.

       Only the superuser can set the time of day.

Return Values
       A  0  return  value  indicates  that  the call succeeded.  A -1 return value indicates an error occurred, and in this case an error code is
       stored into the global variable errno.

Diagnostics
       The call fails under the following conditions:

       [EFAULT]       An argument address referenced invalid memory.

       [EPERM]	      A user other than the superuser attempted to set the time.

See Also
       date(1), stime(2), ctime(3)

																   gettimeofday(2)