Joda Time - Get all weeks of a year

Question

is there a way to get all weeks of a year plus start and ending days of every week ? (With Joda-Time) something like this (2012) : week : 21 start: 21.05.2012 ending : 27.05.12 Thanks for your help

Accepted Answer

Try this:

```
SimpleDateFormat df = new SimpleDateFormat("dd.MM.yyyy"); 
Period weekPeriod = new Period().withWeeks(1);
DateTime startDate = new DateTime(2012, 1, 1, 0, 0, 0, 0 );
DateTime endDate = new DateTime(2013, 1, 1, 0, 0, 0, 0 );
Interval i = new Interval(startDate, weekPeriod );
while(i.getEnd().isBefore( endDate)) {
    System.out.println( "week : " + i.getStart().getWeekOfWeekyear()
            + " start: " + df.format( i.getStart().toDate() )
            + " ending: " + df.format( i.getEnd().minusMillis(1).toDate()));
    i = new Interval(i.getStart().plus(weekPeriod), weekPeriod);
}  
```

Note that the week numbers start at 52 and then go from 1 - 51, since Jan 1 isn't on a Sunday.

If instead you want to see the dates of each Monday-Sunday week:

```
SimpleDateFormat df = new SimpleDateFormat("dd.MM.yyyy"); 
Period weekPeriod = new Period().withWeeks(1);
DateTime startDate = new DateTime(2012, 1, 1, 0, 0, 0, 0 );
while(startDate.getDayOfWeek() != DateTimeConstants.MONDAY) {
    startDate = startDate.plusDays(1);
}

DateTime endDate = new DateTime(2013, 1, 1, 0, 0, 0, 0);
Interval i = new Interval(startDate, weekPeriod);
while(i.getStart().isBefore(endDate)) {
    System.out.println("week : " + i.getStart().getWeekOfWeekyear()
            + " start: " + df.format(i.getStart().toDate())
            + " ending: " + df.format(i.getEnd().minusMillis(1).toDate()));
    i = new Interval(i.getStart().plus(weekPeriod), weekPeriod);
}
```

Joda Time - Get all weeks of a year

Solution

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