[JAVA3D] About classloading error(sun.awt.DrawingSurface)

[BRUGAT Didier]

Hello java3d users,

I have confronted with above error message.
This was result of running an application which run correctly with jdk1.4.
I suppose that my JDK has no class DrawingSurface or my java3D version (1.3.1) is not up to date ...

=== java -version ===
java version "1.5.0-beta"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0-beta-b32c)
Java HotSpot(TM) Server VM (build 1.5.0-beta-b32c, mixed mode)

=== error message ===
java.lang.NoClassDefFoundError: sun/awt/DrawingSurfacejava.lang.NoClassDefFoundError: sun/awt/DrawingSurface
        at javax.media.j3d.DrawingSurfaceObjectDSI.getDrawingSurfaceObjectInfo(DrawingSurfaceObjectDSI.java:85)
        at javax.media.j3d.Canvas3D.paint(Canvas3D.java:1026)
        at sun.awt.RepaintArea.paintComponent(RepaintArea.java:248)
        at sun.awt.RepaintArea.paint(RepaintArea.java:224)
        at sun.awt.motif.MComponentPeer.handleEvent(MComponentPeer.java:395)
        at java.awt.Component.dispatchEventImpl(Component.java:4007)
        at java.awt.Component.dispatchEvent(Component.java:3779)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:463)
        at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:234)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:163)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:157)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:149)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:110)
        at javax.media.j3d.DrawingSurfaceObjectDSI.getDrawingSurfaceObjectInfo(DrawingSurfaceObjectDSI.java:85)
        at javax.media.j3d.Canvas3D.paint(Canvas3D.java:1026)
        at sun.awt.RepaintArea.paintComponent(RepaintArea.java:248)
        at sun.awt.RepaintArea.paint(RepaintArea.java:224)
        at sun.awt.motif.MComponentPeer.handleEvent(MComponentPeer.java:395)
        at java.awt.Component.dispatchEventImpl(Component.java:4007)
        at java.awt.Component.dispatchEvent(Component.java:3779)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:463)
        at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:234)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:163)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:157)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:149)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:110)

Is there any one who knows what's problem ?
Thanks in advance.

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