Thanks Allan!
So I made CincoModel public, and now it works. Is there any disadvantage to
this aproach, is it better to provide my own no-arg constructor and not make
my class public? Thanks again.
-----Original Message-----
From: Allan MacKinnon [mailto:[EMAIL PROTECTED]]
Sent: Friday, March 16, 2001 11:44 AM
To: Josh Howe
Subject: Re: Externalizable problem
you need a public no-arg constructor. if you don't make class
CincoModel public it and its automatically created no-arg
constructor (I'm assuming you didn't write one) have package
access.
Josh Howe wrote:
>
> Hi all,
>
> Sorry for the cross-post from Java - General, but I wasn't getting help
> there.
>
> I hope somebody can help me with my problem. I am trying to save an object
> to disk by implementing Extenalizable. Here's the code:
>
> class CincoModel implements Externalizable{
> private Vector letterstates = new Vector(52);
> private ModelProxy proxy;
>
> ...methods...
>
> public void writeExternal(ObjectOutput out) throws IOException {
> out.writeObject(letterstates);
> }
>
> public void readExternal(ObjectInput in) throws IOException,
> ClassNotFoundException {
> letterstates = (Vector)in.readObject();
> }
> }
>
> Here's the class that saves and loads the object:
>
> class Cinco2 extends JFrame{
>
> ...methods...
>
> private void saveGame(){
> CincoModel m = proxy.getModel();
> if (m != null){
> try{
> FileOutputStream ostream = new
> FileOutputStream("t.tmp");
> ObjectOutputStream p = new
> ObjectOutputStream(ostream);
>
> p.writeObject(m);
>
> p.flush();
> ostream.close();
> } catch (IOException ioe) {
> System.out.println ("Error saving file:");
> System.out.println (ioe.getMessage());
> }
> }
> }
>
> private void loadGame(){
> try{
> FileInputStream instream = new
> FileInputStream("t.tmp");
> ObjectInputStream p = new
> ObjectInputStream(instream);
>
> CincoModel m = (CincoModel)p.readObject();
> proxy.setModel(m);
>
> instream.close();
> } catch (Exception e) {
> System.out.println ("Error loading file:");
> System.out.println (e.getMessage());
> }
> }
>
> When the loadGame() method fires, I get the following exception:
>
> CincoModel; IllegalAccessException
>
> Does anybody know why I'm getting this error? Thanks!
>
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--
Allan MacKinnon
[EMAIL PROTECTED]
Boston, MA
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