Java Date Increment

Question

I'm trying to figure out how to increment dates in JAVA.

The date I'm trying to increment is, 2012-10-01.

The following represents the increments:

2012-10-01 - 2013-09-30
2013-10-01 - 2014-09-30
2014-10-01 - 2015-09-30
2015-10-01 - 2016-09-30

Anything you have tried so far? – Werner Henze Jun 04 '15 at 07:52 — Werner Henze, Jun 04 '15 at 07:52

score 2 · Accepted Answer · answered Jun 04 '15 at 07:48

2

With the new Java time API you can use a LocalDate:

LocalDate date = LocalDate.parse("2012-10-01");

for (int i = 0; i < 4; i++) {
  System.out.println(date + " - " + date.plusYears(1).minusDays(1));
  date = date.plusYears(1);
}

answered Jun 04 '15 at 07:48

assylias

321,522
82
660
783

Thanks man! It works! – Vincent Mercado Sy Jun 04 '15 at 07:54

score 1 · Answer 2 · edited May 23 '17 at 11:43

1

Please try this,

  Calendar c = Calendar.getInstance();
  c.setTime(randomDate);
  c.add(Calendar.YEAR, n);
  newDate = c.getTime();

It is here

edited May 23 '17 at 11:43

Community

1
1

answered Jun 04 '15 at 07:45

bobs_007

178
1
10

It works and it adds a year. Though, what I'm trying to achieve is to have a date range. From 2012-10-01 - 2013-09-30, 2013-10-01 - 2014-09-30. So the safest question can be, how can I increment a specific date to a day behind the next year. – Vincent Mercado Sy Jun 04 '15 at 07:50
@VincentMercadoSy You can do c.add(Calendar.DATE, -1) to minus a day from the date – bobs_007 Jun 04 '15 at 08:06

score 0 · Answer 3 · answered Jun 04 '15 at 07:59

Use following code

import java.util.Calendar;
import java.text.SimpleDateFormat;

public class HelloWorld {
  public static void main(String[] args) {

    Calendar cal = Calendar.getInstance();
    SimpleDateFormat dateformat = new SimpleDateFormat("yyyy-MM-dd");
    cal.set(Calendar.YEAR, 2010);
    cal.set(Calendar.MONTH,9); //Month start with 0=> Jan 
    cal.set(Calendar.DATE,01);
    System.out.println(dateformat.format(cal.getTime()));
        cal.add(Calendar.YEAR,1);
        cal.add(Calendar.DATE,-1);
        System.out.println(dateformat.format(cal.getTime()));


 } 
}

score 0 · Answer 4 · answered Jun 04 '15 at 08:10

0

how about use joda-time.jar e.g

public static String getTargetDate(String date)
{
    DateTime dt = new DateTime(date);
    DateTime dt2 = dt.plusYears(1);
    dt2 = dt2.minusDays(1);
    return dt2.toString().substring(0, 10);
}

answered Jun 04 '15 at 08:10

alex.zhang

1

Java Date Increment

4 Answers4