BufferedRider & BufferedWriter

FileInputStream fileInputStream = new FileInputStream("D:\\SQL and JAVA\\JAVA\\txtFiles\\First.txt");
        FileOutputStream fileOutputStream = new FileOutputStream("D:\\SQL and JAVA\\JAVA\\txtFiles\\Second.txt");
        BufferedReader readerForFile = new BufferedReader(new InputStreamReader(fileInputStream));
        BufferedWriter bufferedWriter = new BufferedWriter(new OutputStreamWriter(fileOutputStream));

        String numberString;
        while((numberString = readerForFile.readLine()) != null){
            bufferedWriter.write(numberString);
        }