serializable

What happens if you take an old serializable object that never had serialVersionUID explicitly specified, and add serialVersionUID to that object? It seems to me that the next time the app was updated by endusers it would try to deserialize data from disc, find out that the serialVersionUID didn't match, overwrite the data with new data from the server/db/whatever and after that you're fine. Am I correct in this assumption? Are there further issues I should be wary of in doing this? private class X implements serializable {... private static final long serialVersionUID = 0L; If you give it the

This question already has an answer here: What does Serializable mean? 10 answers What is object serialization? 13 answers Not quite sure by the definitions I have read what serializable actually does... import java.io.Serializable; import java.text.StringCharacterIterator; import java.util.*; import java.io.*; public final class SavingsAccount implements Serializable { When you use implements Serializable you can convert an object in bytes, so the object can be send across the network, can be saved in a directory, and rebuild in the other side of the network, etc. Serialization allows you to

The code SngList.setOnItemClickListener(new OnItemClickListener() { public void onItemClick(AdapterView a, View v, int position, long id) { Intent intent = new Intent(getActivity(), NowPlaying.class); intent.putExtra("Data1",Songinfo); intent.putExtra("Data2",position); startActivity(intent); } }); code in the receiving class Intent i = getIntent(); ArrayList<SongDetails> Songinfo2 = (ArrayList<SongDetails>)i.getSerializableExtra("Data1"); position=i.getIntExtra("Data2", 1); code for songDetials package sourcecode.jazzplayer; import java.io.Serializable; import android.graphics.Bitmap; public

I want to share java objects across different applications. As long as I use the same package names in the different projects it works fine. But if I change the package names it doesn't work anymore. I tried to solve this by extend the ObjectInputStream class and overriding the readClassDescriptor method. But by doing so I get the following error: java.io.StreamCorruptedException: invalid type code: 00 ... dont know how to solve this problem. Here is the code I use for the extended ObjectInputStream class: public class MyObjectInputStream extends ObjectInputStream { public static Map<String,

This is my first attempt to ask for a solution to a problem of mine so try to be kind guys! I have found numerous solutions to problems I deal with in this site by doing simple search but this time I had no luck I guess. I found nothing to fit my problem so I ended asking a new question. I 'm trying to pass an object through an intent from one activity to another. I have one abstract class and two subclasses (the one of them also abstract) as follows. I need them to be abstract. I removed a lot of code (abstract methods etc.) just to find what the problem is and I ended up with these really

Question title just about says it all. I have a field declared like this: @DatabaseField(canBeNull=false,dataType=DataType.SERIALIZABLE) List<ScheduleTriggerPredicate> predicates = Collections.emptyList(); Depending on context, predicates can either contain the empty list or an immutable list returned by Collections.unmodifiableList(List) with an ArrayList as its parameter. I therefore know that the object in question is serializable, but there is no way I can tell the compiler (and therefore ORMLite) that it is. Therefore I get this exception: SEVERE: Servlet /ADHDWeb threw load() exception

For example: Object A contains Object B that contains Object C that contains Object A. Will Object A serialize properly? Comment #9 here indicates that it does not work . In contrast, XStream indicates that it does handle cyclic references. Yes, the default Java serialization works for cyclic references. When you serialize object C, the field will contain a backreference to the already-serialized object A instead of serializing it again. Paul Wagland Yes, Java serialization works for circular references, read here for more information to help your understanding of what Java serialization can

My generic method needs to serialize the object passed to it, however just insisting that it implements ISerializable doesn't seem to work. For example, I have a struct returned from a web service (marked with SerializableAttribute) that serializes to xml just fine, but, as expected, the C# compiler complains. Is there a way I can check the object is serializable before attempting to serialize it, or, better still, a way of using the where keyword to check the object is suitable? Here's my full method: public static void Push<T>(string url, T message) where T : ISerializable { string xml =