how to add months to the date without Calendar?

Question

I'm now developing gwt project that want to add month to the given date. gwt doesn't support Calendar class so how can I do this ? Date is in "dd.MM.yyyy" format

public Date addMonth(Date d, int months){
}

mine implementation is so long that I need help. Thanks

[EDIT]

addMonth() means just add months to the given date's month. If it is 01.06.2010 adding 4 months is 01.10.2010

for 31 Jan and add 1 it will 28. Feb

what does it mean to add a month? what is january 31st plus one month? is it february 28th? is it march 1st? — leeny, Feb 03 '11 at 06:06

score 12 · Accepted Answer · answered Feb 03 '11 at 07:24

12

you can use CalendarUtil

import com.google.gwt.user.datepicker.client.CalendarUtil;
...
// Now
Date d = new Date();
// Now + 2 months
CalendarUtil.addMonthsToDate(d, 2);

answered Feb 03 '11 at 07:24

Naaooj

910
8
15

score 3 · Answer 2 · edited May 23 '17 at 12:00

3

Take look at How to do calendar operations in Java GWT? How to add days to a Date?

edited May 23 '17 at 12:00

Community

1
1

answered Feb 03 '11 at 07:04

keuleJ

3,418
4
30
51

CoolBeans · Answer 3 · 2011-02-03T06:15:02.050

How about this? Ofcourse you will have to refine this based on how many days in a month and stuff but you get the basic idea. I am not familiar with gwt but I assumed it doesn't support joda time.

This is a rather crude solution. But without using the Calendar class or joda-time this is the only way I can think of for now.

        Date date = new Date();
        SimpleDateFormat df = new SimpleDateFormat("dd.MM.yyyy"); //today is 02.02.2011
        Date baseDate = null;
        try {
            baseDate = df.parse(df.format(date));
        } catch (ParseException e) {
            e.printStackTrace();
        }
        long oneMonthTime = baseDate.getTime()+30*24*60*60; //30 should change based on which month you are on
        System.out.println(df.format(oneMonthTime)); //prints 03.02.2011

how to add months to the date without Calendar?

3 Answers3