[vtkusers] awt_Lock

[Jeff Lee]

did you compile vtk yourself, or are you using a nightly?  it looks odd 
that matlab is running a 1.3.1 jvm and you are using vtk binaries linked 
against java1.4.1.  have you tried any of the java examples that came 
with vtk?
-Jeff

philipp.batchelor at kcl.ac.uk wrote:

>>What does the stack trace look like?  awt_Lock comes from java libs.  
>>Can you post the offensive code and also include a copy of the vtkPanel 
>>you are using?  Is this vtk4.2?
>>-Jeff
>>
>>    
>>
>
>Yes, sorry, vtk 4.2, (gcc 3.2).
>In matlab, the whole error message is:
><BEGIN MATLAB ERROR>
>  
>
>>h = javaObject('HelloWorldApp')
>>    
>>
>??? Error using ==> javaObject
>Java exception occurred:
>java.lang.UnsatisfiedLinkError: 
>/projects/vtk/linux2.2/vtkNightly/VTK-4.2.1/bin/libvtkRenderingJava.so: 
>/usr/local/java/j2sdk1.4.1/jre/lib/i386/libjawt.so: undefined symbol: 
>awt_Lock
>        at java.lang.ClassLoader$NativeLibrary.load(Native Method)
>        at java.lang.ClassLoader.loadLibrary0(ClassLoader.java:1382)
>        at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1306)
>        at java.lang.Runtime.loadLibrary0(Runtime.java:749)
>        at java.lang.System.loadLibrary(System.java:820)
>        at vtk.vtkPanel.<clinit>(vtkPanel.java:31)
>        at HelloWorldApp.<init>(HelloWorldApp.java:22).
>
><END MATLAB>
>The HelloWorldApp.java is
><BEGIN JAVA CLASS>
>import vtk.*;
>public class HelloWorldApp {
>    public HelloWorldApp() {System.out.println("Hello Yalin!"); };
>    public static void hello() {
>        System.out.println("Hello World! 2"); //Display the string.
>    }
>    protected vtkPanel renPanel = new vtkPanel();
>   
>}
><END>
>
>Without the vtkPanel line, matlab runs the class as expected. 
>Doing  System.loadLibrary("vtkRenderingJava"); leads to the same error 
>message.
>Cheers,
>P
>
>  
>
>>vtk 
>>    
>>
>mailing list led me to try putting a > >
>  
>
>>>'protected vtkPanel renPanel = new vtkPanel();'
>>>
>>>just before. This then causes the error message 
>>>'...libvtkRenderingJava.so: 
>>>/usr/local/java/j2sdk1.4.1/jre/lib/i386/libjawt.so: undefined symbol: awt_Lock
>>>
>>>and a search for 'awt_Lock' doesn't find much, the most relevant maybe 
>>>http://www.thalion-graphics.de/jgraph/doc/devel/graph3d-jniconstraints.html
>>>
>>>All the other vtk libraries do not generate complaints from matlab, so the 
>>>problem really seems to come from
>>>System.loadLibrary("vtkRenderingJava");  
>>>
>>>I greped the vtk source for 'awt', but I'm not sure what to look for, I 
>>>also ldd'ed the libraries, this looks ok. 
>>>I'm not an everyday user of java, so maybe I'm missing something? 
>>>
>>>Versions:
>>>linux: RH 7.1, 2.4.7-10
>>>java: jdk1.4.1
>>>matlab: 6.5r13,
>>>typing version -java in matlab produces 'Java 1.3.1 with Blackdown 
>>>Java-Linux Team Java HotSpot(TM) Server VM'
>>>I noticed in vtkJavaAwt.h 'awt.version = JAWT_VERSION_1_3;'
>>>could it be a version problem?
>>>
>>>any suggestion welcome...and sorry as I realise that it is as much a java 
>>>question as a vtk one.
>>>
>>>P. Batchelor
>>>
>>>
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>>> 
>>>
>>>      
>>>
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>>    
>>
>
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