Filtered Byte Streams:

Filtered streams are easily wrappers around underlying input or output streams which transparently gives a few extended level of functionality. These streams are classically  accessed  through  functions  which  are  expecting a  generic  streams,  that  is  a superclass of the translation. A filtered byte streams are FilterInputStream and FilterOutputStream. Their constructors are displays here:

FilterOutputStream(OutputStream os) FilterInputStream(InputStream is)

A method gives in these classes is identical to those in InputStream and OutputStream.