FULL PRODUCT VERSION :
java version "1.8.0_66-ea"
Java(TM) SE Runtime Environment (build 1.8.0_66-ea-b02)
Java HotSpot(TM) 64-Bit Server VM (build 25.66-b02)


ADDITIONAL OS VERSION INFORMATION :
Ubuntu trusty 14.04

A DESCRIPTION OF THE PROBLEM :
Using HostServices.showDocument to show a .pdf file or display a folder does nothing on Ubuntu 14.04 - the same software runs correctly on Windows and Apple Mac platforms.

ADDITIONAL REGRESSION INFORMATION:
Try to show a pdf file with HostServices.showDocument

ACTUAL -
Nothing happens

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
HostServices hostServices= InetSure.application.getHostServices();
String path;
 if(filePath.charAt(0)==File.separatorChar) path= "file://" + pathOrURL;
 else path= "file:///" + pathOrURL;
 hostServices.showDocument(path);
---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
use Desktop instead of HostServices:
SwingUtilities.invokeLater(()->
 {try
  {Desktop.getDesktop().open(new File(filePath));
   }catch(IOException exc) { // handle exception }
 });