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Stuff about serializable

Bill Lee
Greenhorn

Joined: Nov 25, 2006
Posts: 3
I have a question about Serialization. What are the conditions for an object to be serializable?
I know that all member variable in the object must be a primitive type, String or Serializable object.

Does the method's return value and argument need to be serializable too?

What if the body of a method uses an object that is not serializable?

example:


Thank you
David Newton
Author
Rancher

Joined: Sep 29, 2008
Posts: 12617

Only the object in question is being serialized--the return values of methods, or objects used inside methods, have nothing to do with it.
Campbell Ritchie
Sheriff

Joined: Oct 13, 2005
Posts: 39855
    
  28
You will have to check in the Java Language Specification, but I think it is only the instance fields which have to be serializable. It is not a case of primitive, String or Serializable. A String is a Serializable. So is an array (provided its elements are Serlalizable). You can check any class in the API because it will say "implements Serializable" near the top of the page for that class.
Bill Lee
Greenhorn

Joined: Nov 25, 2006
Posts: 3
Thanks for the help guys.
Campbell Ritchie
Sheriff

Joined: Oct 13, 2005
Posts: 39855
    
  28
You're welcome
 
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