[OpenJDK 2D-Dev] [9] RFR JDK-7161283: [macosx]filedialog didn't pop up for awt test InvalidParametersNativeTest

[prasanta sadhukhan]

Hi All,

Please review a fix for jdk9

Bug: https://bugs.openjdk.java.net/browse/JDK-7161283
webrev: http://cr.openjdk.java.net/~psadhukhan/7161283/webrev.00/

The bug mentioned that FileDialog is not shown when "Print" button in 
applet is pressed (when "Print to File" is being tested) where "ok/save" 
option will be shown.
But in standard Apple printer dialog there is no "Print to File" option 
so this filedialog cannot be seen. Rather there is a "PDF" option which 
allows to save the file, so the instructions should be changed in the 
test for Mac.

However, while investigating this problem, I found that there is a NPE 
when no printer is added to the system so PrinterJob.getPrintService() 
returns null but copyAttributes() uses this printService object to check 
supported category attributes without checking if the object is null or 
not. Added the relevant check in PrintJob.

Regards
Prasanta