CustomTool

public static <T> List<T> deepCopy(List<T> src) throws IOException, ClassNotFoundException {
        ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
        ObjectOutputStream outputStream = new ObjectOutputStream(byteArrayOutputStream);
        outputStream.writeObject(src);

        ByteArrayInputStream byteArrayInputStream = new ByteArrayInputStream(byteArrayOutputStream.toByteArray());
        ObjectInputStream inputStream = new ObjectInputStream(byteArrayInputStream);
        List<T> dest = (List<T>) inputStream.readObject();
        return dest;

    }