public void addMessage(Message msg) { String query = "INSERT INTO messages(text, author, timestamp, isDeleted) values(?, ?, ?, ?)"; try { PreparedStatement statement = connection.prepareStatement(query); statement.setString(1, msg.getText()); statement.setString(2, msg.getAuthor()); statement.setString(3, msg.getStingTimestamp()); statement.setInt(4, 0); statement.execute(); } catch (SQLException e) { e.printStackTrace(); } }