Explain System.out.println()

The System class contains several useful class fields and methods. It cannot be instantiated(Private Constructor). It is a final class.

A PrintStream adds functionality to another output stream, namely the ability to print representations of various data values conveniently.

err ==> The "standard" error output stream.
in ==> The "standard" input stream.
out ==> The "standard" output stream.

All the three fields final and returns PrintStream.

* Unlike other output streams, a PrintStream never throws an IOException;
* Optionally, a PrintStream can be created so as to flush automatically; this means that the flush method is automatically invoked after a byte array is written, one of the println methods is invoked, or a newline character or byte ('\n') is written.

All characters printed by a PrintStream are converted into bytes using the platform's default character encoding.

print() and println() are methods of PrintStream class.