[vtkusers] awt_Lock

[Jeff Lee]

philipp.batchelor at kcl.ac.uk wrote:

>I did compile vtk myself, and used the java on our system. Matlab was 
>installed on our system, it comes with its own jvm. I wasn't able
>to get Matlab to use 1.4.1, normally there is an env variable called 
>MATLAB_JAVA for this, but matlab doesn't start if I set it to 1.4.1. But 
>the fact that the java example without vtkPanel works seems to imply that 
>it is not the main issue.
>
It seems to be the main issue for me - your original "hello world" 
example did no graphics or jawt drawing.  I suspect that your build of 
vtk with java1.4.1 headers is somehow conflicting with the 1.3.1 jvm.  
Perhaps if you tried compiling vtk against jdk1.3.1 this might go away....

>I did test Cone.java, which worked fine, I'll try more examples
>
inside matlab, or from the command-line?
-Jeff

>
>P
>
> On Fri, 4 Apr 2003, Jeff Lee wrote:
>
>  
>
>>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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>>    
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>
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