CODEWITHSUNDEEP
java
ycomp
ycomp

Reputation: 8583

Implementing Serialization in a Class that contains an ArrayList

I'm trying to serlialize a class I created, it's not working and for some reason I can't see the entire exception when I try to log it (in android), but that's not important...

I have a suspicion what it might be...

I haven't done java programming in many years... but now I seem to remember perhaps serialization is not completely automatic?

could someone please tell me what I have to do? point me in the right direction?

I have a class AccountList, I implemented serializable... it contains an arraylist of class Account ... I implemented serializable on AccountList and Account.. I mean just declared "implements Serializable"

but now I think I vaguely remember that if there is something like arraylist inside this AccountList class, then I must actually write some serialization code by overriding some methods in AccountList ?

what should I do?

Upvotes: 0

Views: 139

Answers (2)

Steve Kuo
Steve Kuo

Reputation: 63134

An object is serializable if it implements Serializable and all of its non-transient and non-static fields are serializable. If a serializable object contains a collection, then that connection's elements must also be serializable.

Does you AccountList and Account contain collections who's elements are not serializable?

Upvotes: 1

Ernest Friedman-Hill
Ernest Friedman-Hill

Reputation: 81724

Serialization is automatic as long as all the objects involved are Serializable. There are several mechanisms for tweaking how it works, but those are not likely to be relevant for you. Have a look at Account and AccountList and make sure all their member variables are Serializable too. And change your exception-handling code to improve the error display!

Upvotes: 4

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