This abstract class is the superclass of all classes representing an input stream of bytes.
This abstract class is the superclass of all classes representing an output stream of bytes. An output stream accepts output bytes and sends them to some sink. <p> Applications that need to define a subclass of <code>OutputStream</code> must always provide at least a method that writes one byte of output.
IO Utilities. Provides stream handling utilities in singleton Threadpool implementation accessed by static members.