how to add number of days to the date given in a jtextfield with string data type

Question

Good Day . I just wanna ask about adding days in a given date. I have a jtexfield (txtStart) and another jtexfield(txtExpiry). I need to display in txtExpiry the date after 102

Answer 1

Use

yyyy-MM-dd

Note: Capital MM

See : SimpleDateFormat

Now, once you have the date instance you could use Calendar to do the days arithmetic

Calendar cal = Calendar.getInstance();
cal.setTime(parsedDate);
cal.add(Calendar.DATE, 102);
String expDateString = dateFormatter.format(cal.getTime());