How to set System Date & time

[ramjeev]

Hi buddies,
I m facing some difficulties while setting system date and time?..Can anyone help to set System date & time?

Thanks

[new_2_java]

- Open a command prompt
- Type in: date
- it prompts you for new date/time
- enter new values.

[ramjeev]

- Open a command prompt
- Type in: date
- it prompts you for new date/time
- enter new values.

Thanks for reply.I want to set date & time programatically thru Java.

[darkagn]

You can GET the date and time by using

System.currentTimeMillis();

This returns a long type that represents the number of milliseconds since Jan 1, 1970. You can format that long by using the java.util.Calendar and java.text.DateFormat classes.

[ramjeev]

You can GET the date and time by using

System.currentTimeMillis();

This returns a long type that represents the number of milliseconds since Jan 1, 1970. You can format that long by using the java.util.Calendar and java.text.DateFormat classes.

I m using Calendar class only as follows,

Calendar date = Calendar.getInstance();
date.set(i_year,i_mon,i_dt,i_hr,i_min,i_sec);
System.out.println("...."+date.get(Calendar.HOUR_OF_DAY)+"..."+date.get(Calendar.MINUTE)+"..."+date.get(Calendar.SECOND));

After setting the date,time ,I can fetch the updated date for this same instance thru programatically but still i can see the old time in system calendar.
For anyother instance as below ,i can get only the old date and not the updated one.

Calendar dateNew = Calendar.getInstance();

Please help.

[Ezzaral]

The only way that you would be able to set the system time is through JNI calls to the OS.

[ramjeev]

The only way that you would be able to set the system time is through JNI calls to the OS.

Thanks.
I dont know how to use JNI , if u hav samples ,pls guide me with that.

[ramjeev]

Thanks.
I dont know how to use JNI , if u hav samples ,pls guide me with that.

I got a way to fix this,

String timestr="15:00";
String datestr="03-15-2008";
Runtime rt = Runtime.getRuntime();
Process proc;
proc = rt.exec("cmd /C date " + datestr);
proc = rt.exec("cmd /C time " + timestr);

However,this can only work on windows.

Thanks a lot for all ur support.