serialversionuid « serialize « Java I/O Q&A

1. Use the serialVersionUID or suppress warnings? stackoverflow.com

first thing to note is the serialVersionUID of a class implementing Interface Serializable is not in question. What if we create a class that for example extends HttpServlet? It also should have ...

2. explicit serialVersionUID considered harmful? stackoverflow.com

I am probably risking some downvotes on this. It seems to me that explicitly specifying serialVersionUID for new classes is bad. Consider the two cases of not changing it when layout has ...

3. Java - Modifying serialVersionUID of binary serialized object stackoverflow.com

A few months back I serialized a java.io.Serializable object into a file. Now I need to read the contents, but since then the serialVersionUID has changed, and now I'm getting ...

4. Does it matter what I choose for serialVersionUID when extending Serializable classes in Java? stackoverflow.com

I'm extending a class (ArrayBlockingQueue) that implements the Serializable interface. Sun's documentation (and my IDE) advises me that I should set this value in order to prevent mischief:

...

5. How can I find out the serialVersionUID of a serialized Java object? stackoverflow.com

I have several serializable classes that were compiled without specifying a serialVersionUID. I now need to add some data members to these classes but wish to preserve some already serialized objects. ...

6. Why generate long serialVersionUID instead of a simple 1L? stackoverflow.com

When class implements Serializable in Eclipse, I have two options: add default serialVersionUID(1L) or generated serialVersionUID(3567653491060394677L). I think that first one is cooler, but many times I saw people using the ...

7. Should an abstract class have a serialVersionUID stackoverflow.com

In java, if a class implements Serializable but is abstract, should it have a serialVersionUID long declared, or do the subclasses only require that? In this case it is indeed the intention ...

8. Will adding a method change the java-calculated serialVersionUid on my class? stackoverflow.com

If I have a class like this:

public class Name implements Serializable {
    private final String firstName;
    private final String lastName;

    public Name(String ...

9. Finding serialVersionUID of serialized object stackoverflow.com

Is there a way to determine the generated serialVersionUID of a serialized Java object? The problem is that I serialized an object without explicitely specifying the serialVersionUID. Now the deserialization process complains ...

10. Is there a reason to use a real serialVersionUID? stackoverflow.com

This question is an exact duplicate of:

http://stackoverflow.com/questions/888335/why-generate-long-serialversionuid

Ironically, answered by Michael Bogswardt as well.

Michael Bogswardt's answer to generating a serialVersionUID got me thinking. Is there any reason ...

11. Why does double brace initialization asks for SerialVersionUID? stackoverflow.com

public static List<Long> abc = new ArrayList<Long>(){{ //Asks for SerialVersionUID
        abc.add(5L);
        abc.add(7L);
    }};

public static ...

12. Can SerialVersionUid be any number or does it have to be compiler generated? stackoverflow.com

If I write a serialversionUid for my class as say 1234, and I know that no other class in my program uses that, is that fine or do i always have ...

13. Is serialVersioUID require in Interfaces(I hope not)? stackoverflow.com

My understanding is serialVersionUID is applicable only to classes, because we can create an object only to classes and the concept of serialVersionUID is for object serialization and deserialization.

14. Java - When do I have to change the serialVersionUID? stackoverflow.com

I know that I can use serialVersionUID to control the version of classes. And I read that I can then add or remove fields and the class will still be ...

15. Java serialization - incompatible serialVersionUID stackoverflow.com

I understand the theory behind incompatible serialVersionUIDs (i.e. you can discriminate different compilation versions of the same class) but I am seeing an issue that I don't understand and doesn't fall ...

16. Java - serialversionuid stackoverflow.com

Why isn't the serialversionuid automatically generated? I was running into an issue on an application server where apparently an old class was being cached. Walter

17. Do I need to put a serialVersionUID on ancestors of a Serializable class? stackoverflow.com

Do I need to put a serialVersionUID on ancestors of a Serializable class? Or just on the Serializable class itself?

18. Add a serialVersionUID to a serializable class that is already in use stackoverflow.com

I've got a Serializable class that has been in use in production since about 2004. However, the guy who wrote it forgot to generate a serialVersionUID. The whole thing sort of works ...

19. Is it possible to know if a serialVersionUID was automatically generated or not? stackoverflow.com

I'm wondering whether it's possible to figure out if some serialVersionUID has been automatically generated (by the JVM) or whether a static one is explictly defined in the class. Any clue ...

20. Isn't suppressing warnings better option than adding serialVersionUID in this scenario? stackoverflow.com

A common scenario in web applications:

application has lots of classes that need to be stored in Session and are Serializable
developer gets a bunch of warnings about "Serializable class does not implement ...

21. What should I set serialVersionUID to be? stackoverflow.com

Possible Duplicate:
Does it matter what I choose for serialVersionUID when extending Serializable classes in Java?
Why generate long serialVersionUID instead of a simple 1L? ...

22. serialVersionUID no longer required from Java 5 onwards? stackoverflow.com

I recently read a comment saying that usage of serialVersionUID to make different versions of the same class compatible for serialization/deserialization is no longer needed from Java 5 onwards. Is this ...

23. SerialVersionUID for Serializable stackoverflow.com

I am implementing more classes which extend the Serializable interface. I understood it is good to mention a value for serialVersionUID.

private static final long serialVersionUID = 1024L;

So, given that i will ...

24. Strange Serialization issue - serialVersionUID need on an interface!?! coderanch.com

I would very much appreciate it if someone could give me their thoughts on what they think may be causing the following problem. Basically I have the following structure and am getting a local class incompatible error on the interface! Public interface ExecutionActivity extends Serializable Public class ExecutionActivityImpl extends AbstractObject implements ExecutionActivity ExecutionActivityImpl has the serialVersionUID set as follows private ...

25. serializable class has no defination of serialVersionUID forums.oracle.com

Hi Everone! With hope that any one can help me, I post my problem here for SerialVersionUID. I found different Fourm on this, but I am still confusued that serialVersionUId has a different nos which one is best for my warning: [seria] serializable class has no defination of serialVeraionUID? to solve this warning I tried different ID like: public static long ...

26. Serialization - wasn't using serialVersionUID..... forums.oracle.com

Hey all. I have a bit of a pickle. I have some objects that implement serialization. The class description hasn't changed for a very long time and I'm currently not having any problems with them. They do not implement a serialVersionUID. I thought I read somewhere that different JVM implementations may see my class and serialization stream differently causing the objects ...