try {
    // Deserialize from a file
    File file = new File("filename.ser");
    ObjectInputStream in = new ObjectInputStream(new FileInputStream(file));
    // Deserialize the object
    javax.swing.JButton button = (javax.swing.JButton) in.readObject();
    in.close();

    // Get some byte array data
    byte[] bytes = getBytesFromFile(file);
    // see Reading a File into a Byte Array for the implementation of this method

    // Deserialize from a byte array
    in = new ObjectInputStream(new ByteArrayInputStream(bytes));
    button = (javax.swing.JButton) in.readObject();
    in.close();
} catch (ClassNotFoundException e) {
} catch (IOException e) {
}