print() method of DocPrintJob throws ClassCastException for some of the Media
attributes that are added to the HashPrintRequestAttributeSet.
Attached is a sample program and a gif file that the testcase tries to print using the Media attributes.
A media attribute(MediaName or MediaTray or MediaSizeName) is added to the HashPrintRequestAttribute and passed on to DocPrintJob for printing

The testcase when run throws the following exception:
java.lang.ClassCastException: javax.print.attribute.standard.MediaName
         at sun.print.UnixPrintJob.getAttributeValues(UnixPrintJob.java:670)
         at sun.print.UnixPrintJob.print(UnixPrintJob.java:301)
         at MediaTest.printImage(MediaTest.java:166)
         at MediaTest.<init>(MediaTest.java:34)
         at MediaTest.main(MediaTest.java:176)
 
Source: MediaTest.java
Resource: TopLogo.gif