How can I read a table that is returned from a plpgsql function using Java?

Question

I have a postgres plpgsql function that returns a table of cars:

CREATE OR REPLACE FUNCTION getCarsList()
RETURNS TABLE (
    model varchar, 
    engine varchar, 
    manufacturer varchar
) AS $$
    BEGIN
        RETURN QUERY SELECT * FROM cars;
    END;
$$ LANGUAGE plpgsql;

Now, I want to retrieve all table columns from the function and print them using Java. I've tried to write the following code:

result = statement.executeQuery("SELECT getCarsList()");
while (result.next()) {
    System.out.println(result.getString(("model")));
    System.out.println(result.getString(("engine")));
    System.out.println(result.getString(("manufacturer")));
}

But got the following SQLSyntaxErrorException:

Message: The column name model was not found in this ResultSet.
SQLState: 42703
ErrorCode: 0

So, since I don't really understand what is causing the message, is there a way to do what I want?