Is there a way to get the days as a result of arrays if we pass two dates into a function in java

Question

How to get different days between two dates in java:

Source Date: 01-09-2015

Destination Date: 03-09-2015 .

So there are three days: Tuesday, Wednesday, Thursday but does not include Monday, Friday, Saturday, Sunday

Question:

Is there a way to get the days as a result of arrays if we pass two dates into a function in java
Also trying not to have duplicate values(Monday-Sunday)

The technical term is a *[distinct](https://en.m.wikipedia.org/wiki/Distinct) list* of day-of-week. — Basil Bourque, Sep 01 '15 at 15:15

akhil_mittal · Answer 1 · 2015-09-01T11:28:42.133

1

I have quickly compiled the following program in Java which may serve your purpose.

    public static void main(String[] args) throws ParseException {
        SimpleDateFormat myFormat = new SimpleDateFormat("dd-MM-yyyy");
        String inputString1 = "01-09-2015";
        String inputString2 = "10-09-2015";
        Date date1 = myFormat.parse(inputString1);
        Date date2 = myFormat.parse(inputString2);
        long diff = date2.getTime() - date1.getTime();
        Calendar c = Calendar.getInstance();
        c.setTime(date1);


        int days = (int) TimeUnit.DAYS.convert(diff, TimeUnit.MILLISECONDS);
        days = Math.min(days,7);
        String[] resultArray = new String[days];
        for(int i=0; i< days; i++) {
            c.add(Calendar.DATE, 1);
            String result = new SimpleDateFormat("EE").format(c.getTime());
            resultArray[i] = result;
        }
        System.out.println(Arrays.toString(resultArray));
        }

It prints:

[Wed, Thu, Fri, Sat, Sun, Mon, Tue]

edited Sep 01 '15 at 11:28

answered Sep 01 '15 at 10:45

akhil_mittal

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You can optimize it by for(int i=0; i – Oleksandr Sep 01 '15 at 10:52
@ akhil_mittal ........ Code is working but its one day less and there are duplicates – Devrath Sep 01 '15 at 11:03
1

http://stackoverflow.com/questions/20165564/calculating-days-between-two-dates-with-in-java looks familiar. @Devrath use Alexandrs loop condition to avoid dupes – dly Sep 01 '15 at 11:04
@ dly ... though i use alexander loop condition ... still there are duplicates – Devrath Sep 01 '15 at 11:06
@Alexandr: Thanks for suggeation – akhil_mittal Sep 01 '15 at 11:10
@Devrath: Duplicates in what sense? – akhil_mittal Sep 01 '15 at 11:11
1

@akhil_mittal OP wants every weekday once. So if there are two mondays in the time span put only one into the result array. – dly Sep 01 '15 at 11:19
@Devrath: Can you please check edited code once? Is this what you want? – akhil_mittal Sep 01 '15 at 11:29

score 0 · Accepted Answer · answered Sep 01 '15 at 11:13

Using Joda Time, you can do like this :

public ArrayList<String> getDaysBetween(String start, String end){
    DateTimeFormatter formatter = DateTimeFormat.forPattern("dd-MM-yyyy");
    DateTime dstart = formatter.parseDateTime(start);
    DateTime dend = formatter.parseDateTime(end);

    ArrayList<String> days = new ArrayList<>();
    while (dstart.getDayOfYear() <= dend.getDayOfYear()){
        String day = dstart.dayOfWeek().getAsText();
        if(!days.contains(day)){
            days.add(day);
        }
        dstart = dstart.plusDays(1);
    }
    return days;
}

It works when the two dates are on the same year.

Moreover:

dstart.dayOfWeek().getAsText();

return a String based on the current local (in French : "mardi", "mercredi"... - in English : "tuesday", "wednesday"...).

Is there a way to get the days as a result of arrays if we pass two dates into a function in java

How to get different days between two dates in java:

2 Answers2