Fastest way to read a CSV file java

Question

I´ve been trying to read several csv files (arround 20 MB) using openCSV, but so far it has been slow. Im trying to read 4 csv files which I´m loading into a heap, which I h

Answer 1

Besides using java.nio as suggested by @Basil, simply wrapping the FileReader by a BufferedReader should achieve a significant speedup.

FileReader fileReaderMes1 = new BufferedReader( new FileReader(FECHAS[0]));