OutputStream handles byte data.
OutputStream is an abstract class from which all
byte-oriented output streams are derived.
Its descendant classes are used for general-purpose
These streams are aimed at
writing groups of 8-bit bytes to output destinations.
The bytes are in the same format as Java primitive types.
4-byte groups corresponding to type
be written to a disk file.
We will mostly be interested in
We have used
PrintStream many times already,
System.out is an object of that type.