serializing an ArrayList

[Ricardo Soares]

Hello everyone, here is my problem:

i have the following classes:

public class Event implements Serializable{
   //stuff
   Date date;
   public Event(String name, Date date){
      this.name=name;
      this.date=date;
   }
}

public class Date implements Serializable{
   //stuff
   public Date(int day, int month, int year){
      this.day=day;
      this.month=month;
      this.year=year;
   }

public static void main(String args[]){
   static List<Event> events = new ArrayList<Event>();
}

each time i create an instance of Event it receives a date and is then added to the arraylists events

I have another class that does the serialization to and from xml

when i deserialize the xml it restores all the elements of the events arraylist but each event has its date ( day month and year ) with values 0

is there anything i need to do in order to make my serialization save the variables from the date class ?

thanks in advance

[Ivan Jozsef Balazs]

You did not post the relevant part of your Date class.
Hopefully the data members are not transient!

[Ricardo Soares]

no they are not transient

public class Date implements Serializable{  
   int day,month,year;
   public Date(int day, int month, int year){  
      this.day=day;  
      this.month=month;  
      this.year=year;  
   } 
   getters and setters
}

[Ivan Jozsef Balazs]

That seems to be ok. How do you fill that List?

[Ricardo Soares]

public class Helper{
   public Event createEvent(String name,Date date){
      Event event = new Event(name,date);
      return event; 
   }
}

public static void main(String args[]){
   static List<Event> events = new ArrayList<Event>();  
   Helper help = new Helper();
   events.add(help.createEvent(name,date));
}

class helper is a class with methods to create, edit, remove, etc

[Ishan Pandya]

I am not Sure but if your are building a manual "Date" class which implements Serializable and has Constructor of your choice then please do change its name from Date to MyDate or anything you like..and make the respective changes every where in your code.
I think it would be because if you use "java.util.*" as an import statement it may take the inbuilt Date class.
Do the change and post what happens after that..

[Paul Clapham]

Ricardo Soares wrote:I have another class that does the serialization to and from xml

when i deserialize the xml it restores all the elements of the events arraylist but each event has its date ( day month and year ) with values 0

is there anything i need to do in order to make my serialization save the variables from the date class ?

Well, yes there is. But since we don't know how your deserializing works, it's hard to say much about exactly what you would have to do. I can say that just declaring classes as Serializable doesn't have any effect on how you get your data out of an XML document -- at least, probably not. How about showing us how you deserialize from XML?