Question

what is the main use of printStream?

Answer 1

printStream allows you to write data to an underlying "outputStream". This data, consisting of primitive types like "int", can be formatted as text rather than byte values. This is useful when someone wants to view these values as they would be seen in the console window.

Answer 2

A PrintStream gives you the ability to print a output to another file. So instead of using System.out.println () you would use the variable name of the PrintStream and replace the System.out. So if the PrintStream variable name was output you would say "output.println ("") to print the output in a external file