I want to let the user know if the delete statement was successful or not is there a way to do this?

Question

Here I have my method that deletes the customer given the id. It works, but if you give it an invalid id nothing happens and I want to tell the user that the delete failed. I tried using an if statement with executeQuery(), but I realized it returns false even if the delete was successful not just when there are no rows affected.

private static final String DELETE = "DELETE FROM customers WHERE customer_id = ?";

public void deleteByID(int id) {
        try(PreparedStatement ps = this.connection.prepareStatement(DELETE)) {
            ps.setInt(1, id);
            ps.execute();
        } catch(SQLException e) {
            e.printStackTrace();
        }
    }

Answer 1

You can use PreparedStatement.executeUpdate() which will return number of rows affected. If the return value is < 1, no rows were deleted. Based on that you can show the error to the user.