Java - Problema con flujo de ficheros

34.5,45.7,23.6 8.4, 9.6

12.0 23.3

public static void main(String[] args) throws IOException {

		FileInputStream fi = new FileInputStream("reales.txt");

		ArrayList<Double> list = new ArrayList<Double>();

		int length = fi.available();

		String aux = "";

		for(int i=0;i<length;i++){

			char c = (char)fi.read();

			if(c!=','&&c!=' '&&c!='\n'){

				aux+=c;

			}else{

				if(aux!=""){

					list.add(Double.parseDouble(aux));

				}

				aux = "";

			}

		}

		fi.close();

		for(Double d:list){

			System.out.println(d);

		}

	}

34.5

45.7

23.6

8.4

9.6

12.0

FileInputStream fi = new FileInputStream("reales.txt");

        ArrayList<Double> list = new ArrayList<Double>();

        Scanner s = new Scanner(fi);

        while (s.hasNext()) {

            String[] lines = s.nextLine().replaceAll(",", " ").split(" ");

            for (String line : lines) {

                if (!line.equalsIgnoreCase("")) {

                    list.add(Double.parseDouble(line));

                }

            }

        }

        for (double d : list) {

            System.out.println(d);

        }

if(aux!=""){

	list.add(Double.parseDouble(aux));

}

public static void main(String args[]) throws FileNotFoundException {

		Scanner sc = new Scanner(new FileInputStream("/tmp/reales.txt")).useDelimiter("[, \n]+");

		ArrayList<Double> list = new ArrayList();

		while(sc.hasNextDouble()) {

			list.add(sc.nextDouble());

		}

		sc.close();

		for(Double d : list) {

			System.out.println(d);

		}

	}