Need help (desperately) '^_^ in writing multiple objects in a single file

For all those Java guru out there please help me,
I want to write a simple application that can serialize objects in a single file. Currently I know how to serialize one object in one file using the ObjectOutputStream's writeObject () method.But the problem is that if i have 10.000 objects to serialize then I will have 10.000 file in my HD. To simplify things I want to write those 10.000 objects in a single file. But I dont know how to do that, any one can help ??

You can write any number of objects of any type into a file when you serialize them. You need to realize that once they're written to the file, they're all placed in there as type Object, so there really isn't any distinction between any of them. You don't have a file that contains only Shapes, or only Images. You write them out as Objects, and then you discover their types later as your deserialize them and read them in. You should read into the "Reflection" capabilities that all objects have. You write an Image to a file, and then a Shape, and then a Color, you can later pack these all into an ArrayList as you read them in, and when you use them discover their type using reflection.
-Jason Thomas.

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chavada wrote:
Dear Cynthiaw,
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first file
public class Matrix extends Object {
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     private int    colMatrix;     // number of columns
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     Verify tata;
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}My basic aim is to verify the formula
(A . B)' =B' . A' or {(A*B)tranpose = Btranspose * A transpose}Now My problem is that I have to run the verify class file and verify class file will call the matrix class and its methods when to do certain calculations (for example to find left formula it calls tranposematrix() and multipleMatrix();)
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please peeople help me put in this.
thanking in advance

Please don't crosspost.
http://forum.java.sun.com/thread.jspa?threadID=691969
The other one is the crosspost.Okay, whatever. I'm not really concerned with which one is the original. I just view the set of threads overall as being a crosspost, and arbitrarily pick one to point others toward.
But either way
knightofdurham... pick one thread and post only in
the one.Indeed. And indicate such in the other one.

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Need help (desperately) '^_^ in writing multiple objects in a single file

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