Date + days calculator

Question

I want to create a JAVA-program that show me some dates.

A box where I insert a date. ex. 26/10/2013
Another box where I insert a number of days that I want to add to the date in the first box. And an answerbox that show the resultdate.

Ex1 . 26/10/2013 + 148 days = a date
Ex2 . 24/12/1980 + 9245 days = a date

Box1 : 26/10/2013 + Box2 : 148 = Answer : 23/03/2014

Could anyone help me ?

Answer 1

GregorianCalendar gcal = new GregorianCalendar(2013, Calendar.OCTOBER, 26);
gcal.add(Calendar.DATE, 148);
SimpleDateFormat sdf = new SimpleDateFormat("dd/MM/yyyy");
String answer = sdf.format(gcal.getTime());

// output in default time zone (my zone: 23/03/2014)