Create file name using date and time

Question

I hope you could help me, I\'m trying to call in the date from another class and looks like \"2011-03-09 06-57-40\", I want to use this to create the file below but everytim

Answer 1

I'll try and answer all the same. To obtain a date or time string in the most controlled manner possible use the following code

Calendar cal = Calendar.getInstance();
SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");
String dateStr = dateFormat.format(cal.getTime());

Look up http://download.oracle.com/javase/6/docs/api/java/text/SimpleDateFormat.html . It might help with understanding. You can also add hour/minute or what you need to the formatted String.

Another option might be to always set the "lower" fields like milliseconds, seconds, minutes in the Calendar to zero.

cal.set(Calendar.MINUTE,0);

If you are retrieving your date from another class and cannot directly create a calendar you can also put the date into the calendar (note: for just formatting you don't need the calendar)

cal.setTime(date);

Maybe this helps getting more control of the created filename / file.