Input
The classes to do input are mostly the flip side of the output classes we have already seen. Java programs access external data by instantiating a stream on the data source. Each place from which an input stream can flow has a class dedicated to getting that kind of input. Input is read from a stream of data representing the file, pipe, socket, memory array, or whatever. If you want to read 16-bit characters, you use a Reader class. If you want to read binary bytes or ASCII, you use an input stream.
Inputting double-byte characters
As usual, first decide between binary and character I/O, then choose your class based on where the data is coming from. For reading double-byte character data, you will use one of the Reader classes ...
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