Java reads and writes ultra-large text files row-by-row

The following code is recommended when reading and writing text files larger than 2 GB by line

Void largeFileIO (String inputFile, String outputFile ){
Try {
BufferedInputStream bis = new BufferedInputStream (new FileInputStream (new File (inputFile )));
BufferedReader in = new BufferedReader (new InputStreamReader (bis, "UTF-8"), 10*1024*1024); // 10 MB Cache
FileWriter fw = new FileWriter (outputFile );
While (in. ready ()){
String line = in. readLine ();
Fw. append (line + "");
}
In. close ();
Fw. flush ();
Fw. close ();
} Catch (IOException ex ){
Ex. printStackTrace ();
}