Reading Objects prompts java.lang.OutOfMemoryError

Question

I have searched though this forum and still haven't found the answer. Please help!!!
I think that after running the below code I get this error:
java.lang.OutOfMemoryError
<<no stack trace available>>
I have created object files as large as 10MB, but this time it gives me an error.
Before the below code is run I query the database. This querying takes about 5 minutes in total. The data from the query is stored into a Fileset objects, and then I try to save those fileset objects into data files.
This exception is shown right after I finish reading from the database.
What could be wrong???
public void createFileObjects() {
     try {
     FileOutputStream ostream = new FileOutputStream(filesetChoice + "_object");
     ObjectOutputStream p = new ObjectOutputStream(ostream);
     if (filesetChoice.equals("Z")){
p.writeObject(fsZ);
else if (filesetChoice.equals("Y")){
p.writeObject(fsY);
else {
p.writeObject(fs0);
p.flush();
     ostream.close();
catch (IOException io) {
System.out.println(" " + io);
Thanks!!!

Answer 1

It probably would be possible, I just don't know how to do it. I have a fileset object that I am saving into a data file. If, instead, I take the contents of this object and save them one by one, it would be a tendious process and very error prone.
Why do you think I get this message?