Read remote .csv file using opencsv

CSVReader takes a Reader argument according to the documentation, so it isn't limited to a FileReader for the parameter.

To use a CSVReader without saving the file first, you could use a BufferedReader around a stream loading the data:

URL stockURL = new URL("http://example.com/stock.csv");
BufferedReader in = new BufferedReader(new InputStreamReader(stockURL.openStream()));
CSVReader reader = new CSVReader(in);
// use reader