Copy Bytes

package StreamsFilesAndDirectories4;

import java.io.*;

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

        String pathIn = "input.txt";
        String pathOut = "output.txt";

        FileInputStream in = new FileInputStream(pathIn);
        FileOutputStream out = new FileOutputStream(pathOut);

        int oneByte = in.read();
        while (oneByte >= 0) {

            if (oneByte == 32 || oneByte == 10) {
                out.write((char) oneByte);
            } else {
                String digits = String.valueOf(oneByte);
                for (int index = 0; index < digits.length(); index++) {
                    out.write(digits.charAt(index));
                }
            }
            oneByte = in.read();
        }
    }
}