<AWT Dev> [9] Review Request: 8154493 AppletViewer should emit its deprecation warning to standard error

[Sergey Bylokhov]

Hello.
Please review the small fix for jdk9.

The message about deprecation of appletviewer now will be printed to 
err. the flush() was added, so the message will not be mixed with some 
normal output.

The reason of the change was provided by Stuart:
"Standard output is used for the application's data output. If the 
deprecation warning were sent to standard output, it would be intermixed 
with any output from the application. This might cause errors 
downstream, when some other program tries to process this application's 
output, and unexpectedly encounters the deprecation warning. Standard 
error is used not only for actual errors, but for other diagnostics, 
meta-information, etc., including warning messages.
"

Bug: https://bugs.openjdk.java.net/browse/JDK-8154493
Webrev can be found at: http://cr.openjdk.java.net/~serb/8154493/webrev.00

-- 
Best regards, Sergey.