javaical4j

Why am I getting ValidationException while using ical4j properly?

I've tried to build a calendar with ical4j. When I'm trying to get the output to a file, it's giving me an exception like given below :

net.fortuna.ical4j.validate.ValidationException: Property [PRODID] must be specified once.

The code : 

FileOutputStream icsOutputStream = new FileOutputStream(new File("").getAbsoluteFile()+ "classInfo.ics");
CalendarOutputter icsOutputter = new CalendarOutputter();
icsOutputter.output(ical4jHandler.icsCalender,icsOutputStream);
Solution

  • From the ical4j documentation, you can try this : 

    import net.fortuna.ical4j.model.Calendar;

// add this :
// create a new calendar
Calendar cal = new Calendar();
cal.getProperties().add(new ProdId("-//Ben Fortuna//iCal4j 1.0//EN"));
cal.getProperties().add(Version.VERSION_2_0);
// set other properties by looking at the documentation..

// your code 
FileOutputStream icsOutputStream = new FileOutputStream(new File("").getAbsoluteFile()+ "classInfo.ics");
CalendarOutputter icsOutputter = new CalendarOutputter();
// send the cal reference directly.
icsOutputter.output(cal,icsOutputStream);

    Plz refer to the docs for more info.