스윙 프로그램의 상태를 저장하고 다시 로드하는 방법은 무엇입니까?

Properties properties = new Properties();
properties.setProperty("cell_data", board.getCellDataAsString());
properties.store(new FileOutputStream("game.properties"), "Game Properties");

JAXBContext context = JAXBContext.newInstance(Board.class);
Marshaller marshaller = context.createMarshaller();
marshaller.marshal(board, new FileOutputStream("game.xml"));

Preferences prefs = Preferences.userRoot().node("minesweeper");
prefs.put("cell_data", board.getCellDataAsString());

try (Connection connection = DriverManager.getConnection("jdbc:h2:~/minesweeper")) {
  try (Statement statement = connection.createStatement()) {
    statement.execute("INSERT INTO cells (data) VALUES ('" + board.getCellDataAsString() + "')");
  }
}

try (ObjectOutputStream oos = new ObjectOutputStream(new FileOutputStream("game.ser"))) {
  oos.writeObject(board);
}