How can I read a file as unsigned bytes in Java?

Question

How can I read a file to bytes in Java?

It is important to note that all the bytes need to be positive, i.e. the negative range cannot be used.

Can this be d

Answer 1

Some testing revealed that this returns the unsigned byte values in [0…255] range one by one from the file:

Reader bytestream = new BufferedReader(new InputStreamReader(
        new FileInputStream(inputFileName), "ISO-8859-1"));
int unsignedByte;
while((unsignedByte = bytestream.read()) != -1){
    // do work
}

It seems to be work for all bytes in the range, including those that no characters are defined for in ISO 8859-1.