Changing Date Format in Java: Transforming dd/MM/yyyy to yyyy/MM/dd

To alter the date format from dd/MM/yyyy to yyyy/MM/dd in Java, you can utilize the SimpleDateFormat class. Here's how to proceed:

1. Define the original and new date formats as String constants:

final String OLD_FORMAT = "dd/MM/yyyy";
final String NEW_FORMAT = "yyyy/MM/dd";

2. Consider the original date string, for instance:

String oldDateString = "12/08/2010"; // Assuming August 12, 2010

3. Create a SimpleDateFormat object using the original format:

SimpleDateFormat sdf = new SimpleDateFormat(OLD_FORMAT);

4. Parse the original date string using this SimpleDateFormat object into a Date object:

Date d = sdf.parse(oldDateString);

5. Subsequently, adapt the SimpleDateFormat object to use the new format:

sdf.applyPattern(NEW_FORMAT);

6. Finally, format the Date object using the updated SimpleDateFormat object to obtain the new date string:

String newDateString = sdf.format(d);

This approach allows you to successfully convert the date string from the original format (dd/MM/yyyy) to the desired format (yyyy/MM/dd).