NoClassDefFoundError: com/sun/java/accessibility/util/SwingEventMonitor

[Pete Brunet]

Thanks David, I did indeed have a typo.  My java.ext.dirs isn't null but
C:\OpenJDK-b96m\jdk7\build\windows-i586-fastdebug\lib\ext;C:\WINDOWS\Sun\Java\lib\ext
and I did have the required jar file in that directory so I suppose I
should still try to figure out why using AWTEventMonitor from a jar
causes the NoClassDefFoundError.  I suspect I won't look any further
though since I need to eventually merge the classes of that package into
the JDK anyway - and that fixes the problem, i.e. putting them into the
classes directory.

Pete

David Schlosnagle wrote:
> On Wed, Aug 4, 2010 at 12:12 AM, Pete Brunet <peter.brunet at oracle.com> wrote:
>   
>> The failure is on this line of code:
>> AWTEventMonitor.addFocusListener(this)
>> which resides in ...\classes\sun\awt\windows\accessibility
>>
>> AWTEventMonitor is a class in jaccess-1_4.jar which is in lib/ext
>>
>> However, just before the failing line is executed, a println shows these two
>> system properties
>> java.ext.dir: null
>> java.class.path: \Program
>> Files\Java\jdk1.6.0_20\demo\jfc\SwingSet2\SwingSet2.jar
>>
>> so that seems to explain why a class in a jar in lib/ext won't be found
>> (unless there is some other internal means being used to find jar files).
>>
>> Since I suspect I'll eventually merge this package into the jdk, to continue
>> debugging I extracted the jar into the classes directory.
>>     
>
> Pete,
>
> I'm not sure if you just have a typo, but the system property for
> specifying alternate extension directories is "java.ext.dirs" [1], and
> it can be a list of directories delimited by the
> java.io.File.pathSeparatorChar (';' on Windows, ':' on Unix).
>
> [1]: http://download.oracle.com/javase/6/docs/technotes/guides/extensions/spec.html#installed
>
> - Dave
>   
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