Converting date-string to a different format

Question

I have a string containing a date in the format YYYY-MM-DD.

How would you suggest I go about converting it to the format DD-MM-YYYY in the

Answer 1

If you're not looking for String to Date conversion and vice-versa, and thus don't need to handle invalid dates or anything, String manipulation is the easiest and most efficient way. But i's much less readable and maintainable than using DateFormat.

String dateInNewFormat = dateInOldFormat.substring(8) 
                         + dateInOldFormat.substring(4, 8) 
                         + dateInOldFormat.substring(0, 4)