Use strings to handle dates in Java is not always the best option. For example, when it is a leap year, February has an extra day. Because strings can be seemingly correct, it is more appropriate to perform a conversion. Java validates that the date is correct.
You can convert strings to dates using the SimpleDateFormat class.
public static void main(String[] args) throws ParseException {
String dateString1 = "05-12-2012";
String dateString2 = "05-13-2012";
SimpleDateFormat format = new SimpleDateFormat("dd-MM-yyyy");
Date date1 = format.parse(dateString1);
Date date2 = format.parse(dateString2);
if (date1.compareTo(date2) <= 0) {
System.out.println("dateString1 is an earlier date than dateString2");
}
}
To find out which parameters are allowed to check Customizing Formats (The Java™ Tutorials > Internationalization > Formatting)