public static void save() { 
		ObjectOutputStream oos = null;
		try {
			File file = new File("items.data"); 
			FileOutputStream fos = new FileOutputStream(file);
			oos = new ObjectOutputStream(fos);
			for (Item item : getList()) {
				oos.writeObject(item);
			}
		} catch(Exception e) {
			e.printStackTrace();
		} finally {
			try {
				oos.close();
			} catch(Exception e) { }
		}
	}