Check this out:
try {
SimpleDateFormat format1 = new SimpleDateFormat("MMM dd, yyyy");
SimpleDateFormat format2 = new SimpleDateFormat("yyyy-MM-dd");
String stringDate = "Dec 13, 2013";
Date date = format1.parse(stringDate);
System.out.println(format2.format(date));
} catch (ParseException exp) {
// Take appropriate action
}
Output: 2013-12-13
3
solved How to change the format of date in java [duplicate]