Reads one input byte, zero-extends it to type int, and returns the result, which is therefore in the range 0 through 255. This method is suitable for reading the byte written by the writeByte method of interface DataOutput if the argument to writeByte was intended to be a value in the range 0 through 255.

Returns:  the unsigned 8-bit value read.

Exceptions:

EOFException		if this stream reaches the end before reading all the bytes.
IOException		if an I/O error occurs.