Hashtable/filer

?

Om igen!

De klasser som du lagre i din hashtable skal implementere interfacet Serialazible, så objekterne af disse klasser kan konverteres til en bit-sekvens.

Denne kode-stump virker!

    public int save(String filename, Hashtable shapes) {
        try
        {
            // files will be saved the the directory called "saved"
            File out = new File("saved/" + filename);
            FileOutputStream outstream = new FileOutputStream(out);
            ObjectOutputStream objstream = new ObjectOutputStream(outstream);
            objstream.writeObject(shapes);
            objstream.close();
            outstream.close();
            return 0;
        }
        catch(IOException e)
        {
            System.out.println("Error on saving file: " + filename);
            return -1;
        }
    }

    public Hashtable load(String filename){
        try
        {
            File in = new File("saved/" + filename);
            FileInputStream instream = new FileInputStream(in);
            ObjectInputStream objin = new ObjectInputStream(instream);
            Hashtable result = (Hashtable) objin.readObject();
            return result;
        }
        catch(Exception e)
        {
            System.out.println("Error on loading the file: " + filename);
            return null;
        }
    }

Det burde virke!

Og det gør det!