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Adding a time to current date...

Posted on 2003-10-29
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Last Modified: 2010-08-05
May I ask how to add or subtract a time to a current date...?  May I also ask if the result could still be a date...?

Thanks in advance experts...! =)
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Question by:aris_datuin
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sciuriware earned 80 total points
ID: 9640561
You are welcome,

if you convedrt a Date into a long (mSec) you can add as you like.
If you convert back to a Date it will probably not be the same Date (datum).
So, you can!
Examples?
;JOOP!
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Expert Comment

by:TimYates
ID: 9640575
// Get a calendar
Calendar c = Calendar.getInstance() ;
// Set the time to now
c.setTimeInMillis( System.currentTimeMillis() ) ;
// Add four hours
c.add( Calendar.HOUR, 4 ) ;
// add 30 mins
c.add( Calendar.MINUTE, 30 ) ;
// get the date back
Date newDate = new Date( c.getTimeInMillis() ) ;
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Author Comment

by:aris_datuin
ID: 9640634
That was fast...  
I've tried the codes Tim but I am encountering an error in setTimeInMillis...

setTimeInMillis has protected access in java.util.Calendar

May I ask how to resolve this...?

Thanks again... =)
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Author Comment

by:aris_datuin
ID: 9640684
anyway it's ok now...  getTime() is working fine...

thanks a lot experts...! =)
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Expert Comment

by:TimYates
ID: 9640688
It does?

What JDK you using?  It's public in 1.4

Hmmm...

Try:

c.setTime( new Date() ) ;

instead...  that will do the same thing :-)
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Expert Comment

by:TimYates
ID: 9640689
:-)
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Expert Comment

by:sciuriware
ID: 9640776
aris_datuin, next time at least split the points: I gave you no details .....

;JOOP!
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