This is usually a better place to send error information
than System.out, which may be redirected. If you send output to
System.err it will not be redirected along with System.out so the user
is more likely to notice it."
I guess what is meant here is the redirection from the calling context.
will redirect normal output to a logfile, and error-messages to an error-file.
To mix them, you would use:
but I don't know, whether the second one will work on dos-like-systems.
The first one will.