try {
        // Deserializza da un file
        File file = new File("user.ser");
        ObjectInputStream in = new ObjectInputStream(new FileInputStream(file));

        // Deserializza l'oggetto
        javax.swing.JButton button = (javax.swing.JButton) in.readObject();
        in.close();
        
        // Deserializza da un array di bit
        in = new ObjectInputStream(new ByteArrayInputStream(bytes));
        button = (javax.swing.JButton) in.readObject();
        in.close();
    } catch (ClassNotFoundException e) {
    } catch (IOException e) {
    }