Is there a way to change data in a stream?

[plush timber]

Please tell me, I want to implement reading the database table while the thread is running, what are the ways to implement this, and is it possible at all?
I give an example:
While the program is running, it reads the field of the database table and saves them to a separate file, when adding values ​​​​to the field, it automatically saves this value to the file if the thread is running.
What did i get:

@Override
    public void run() {
        try {
            Lock lock = new ReentrantLock();
            lock.lock();

            ResultSet resultSet = connection.createStatement().executeQuery("SELECT * FROM panel");

            while (resultSet.next())
                System.out.println(resultSet.getString("id"));

            lock.newCondition().await();
        } catch (SQLException | InterruptedException exception) {
            throw new RuntimeException(exception);
        }
    }

[proud ibex]

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[proud ibex]

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[nova stream]

public void run() {
    try {
        Lock lock = new ReentrantLock();
        lock.lock();

        ResultSet resultSet = connection.createStatement().executeQuery("SELECT * FROM panel");

        while (resultSet.next())
            System.out.println(resultSet.getString("id"));

        lock.newCondition().await();
    } catch (SQLException | InterruptedException exception) {
        throw new RuntimeException(exception);
    }
}```