Could a byte read from a file by readUnsignedByte() be written to another file by writeByte().

A good answer might be:

Yes. Both methods use the same part of an int for their data.

The next example program is a file copy program. The text file copy program (of two chapters ago) did character-based IO with FileReader and FileWriter. It could not be used for binary files. The new copy program will do byte-oriented IO and will work with any file. The program is invoked from the command line, like this:

C:\Programs > java copyBytes sourceFile to destinationFile

As with the previous program, the "to" argument is to ensure that the user has the files in the correct order. The program operates by reading the original file one byte at a time and writeing to the copy file one byte at a time.

QUESTION 14:

What two stream classes are likely to be useful?