I am running a java app which adds a tray icon to the notification area and displays a message. When I run this on SolarisSparc10-JDS machine where notification area is not added to the panel, TrayIcon.displayMessage() throws a NullPointerException. This is incorrect. When notification area is not available on the panel, all subsequent tray icon calls must be ignored.

Here is the exception:
Exception in thread "main" java.lang.NullPointerException
at sun.awt.X11.XTrayIconPeer.displayMessage(XTrayIconPeer.java:221)
at java.awt.TrayIcon.displayMessage(TrayIcon.java:536)
at SystemTrayTest.<init>(SystemTrayTest.java:91)
at SystemTrayTest.main(SystemTrayTest.java:225)

This is reproduced on SolarisSparc10-JDS with the following PIT build:

java version "1.6.0-awt.pit-int-awt-blade"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.6.0-awt.pit-int-awt-blade-df153228_06_May_2005_08_56-b00)
Java HotSpot(TM) Client VM (build 1.6.0-ea-b35, mixed mode)

Run the attached test on a system which does not have notification area added to the panel. You will get the above exception.
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