increment now date by several days issue in java

Question

I need to increment date by some days.

private Date now = new Date();
private Date result;

public void incrementDate(Integer days) {

    result = 

}

So if days equals 3 i need to increment my now date on 3 days and set it to result.

I know that java 8 has plusDays method in LocalDate class. Is there a way how to implement this in java 7.

For [example](http://stackoverflow.com/questions/21842934/how-to-add-days-to-java-simple-date-format/21842959#21842959) — MadProgrammer, Nov 12 '14 at 07:21

score 0 · Answer 1 · answered Nov 12 '14 at 07:22

0

Use Calendar

Calendar cal = Calendar.getInstance ();
cal.setTime (now);

cal.add (Calendar.DATE, days);

plus other fun stuff.

answered Nov 12 '14 at 07:22

Scary Wombat

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score 0 · Answer 2 · answered Nov 12 '14 at 07:23

0

Use Calendar to do this:

Calendar cal = new GregorianCalendar();
cal.add(Calendar.DATE,3);
result = cal.getTime()

answered Nov 12 '14 at 07:23

Jens

67,715
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score 0 · Answer 3 · answered Nov 12 '14 at 07:24

I suggest you make the function static and pass in now. return Date and use a Calendar. Something like,

public static Date incrementDate(Date now, int days) {
    Calendar cal = Calendar.getInstance();
    cal.setTime(now);
    cal.add(Calendar.DAY_OF_MONTH, days);
    return cal.getTime();
}

And then to test it

public static void main(String[] args) {
    DateFormat df = new SimpleDateFormat("yyyy-MM-dd");
    Date now = new Date();
    System.out.println(df.format(now));
    System.out.println(df.format(incrementDate(now, 3)));
}

Output here (today) is

2014-11-12
2014-11-15

score 0 · Answer 4 · answered Nov 12 '14 at 07:25

try this code :

SimpleDateFormat sdf=new SimpleDateFormat("yyyy/MM/dd");
Calendar cal=Calendar.getInstance();
String today=sdf.format(cal.getTime());
System.out.println(today);
cal.add(Calendar.DATE, 20);
String After=sdf.format(cal.getTime());
System.out.println(After);
Date now = new Date();

increment now date by several days issue in java

4 Answers4