Trouble with suns Java 3d tutorial (solved)

[Rabe]

Hallo, i tried to learn something about java 3d by following sun's java 3d tutorial step by step but everytime i try to compile i get a NullPointerException. The code from the Example is listed below, I'm working with the Eclipse IDE on a Windows system (which shouldn't matter anyway, because it should work on any IDE / OS, but I listed those things just in case...)

import java.applet.Applet;
import java.awt.BorderLayout;
import java.awt.Frame;
import java.awt.event.*;
import com.sun.j3d.utils.applet.MainFrame;
import com.sun.j3d.utils.universe.*;
import com.sun.j3d.utils.geometry.ColorCube;
import javax.media.j3d.*;
import javax.vecmath.*;

public class HelloJava3Da extends Applet
{
   public HelloJava3Da()
  {
      setLayout(new BorderLayout());
      Canvas3D canvas3D = new Canvas3D(null);
      add("Center", canvas3D);

      BranchGroup scene = createSceneGraph();
      scene.compile();

    // SimpleUniverse is a Convenience Utility class
      SimpleUniverse simpleU = new SimpleUniverse(canvas3D);

      // This moves the ViewPlatform back a bit so the
      // objects in the scene can be viewed.
      simpleU.getViewingPlatform().setNominalViewingTransform();

      simpleU.addBranchGraph(scene);
   } // end of HelloJava3Da (constructor)

   public BranchGroup createSceneGraph()
   {
   // Create the root of the branch graph
      BranchGroup objRoot = new BranchGroup();

   // Create a simple shape leaf node, add it to the scene graph.
   // ColorCube is a Convenience Utility class
      objRoot.addChild(new ColorCube(0.4));

      return objRoot;
   } // end of createSceneGraph method of HelloJava3Da
   // The following allows this to be run as an application
   // as well as an applet

   public static void main(String[] args)
   {
       Frame frame = new MainFrame(new HelloJava3Da(), 256, 256);
   } // end of main (method of HelloJava3Da)

}

[InteractiveMesh]

Hi,

a null GraphicsConfiguration throws a NullPointerException in the current Java 3D 1.5.x release. Give this a try:

1   2   3   4   5   6   7   8   9   10   11   12   13   14

import java.awt.GraphicsConfiguration;   GraphicsConfiguration gc = SimpleUniverse.getPreferredConfiguration(); Canvas3D canvas3D = null; try {     canvas3D = new Canvas3D(gc); } catch (NullPointerException e) {     // handle exception } catch (IllegalArgumentException e) {     // handle exception }

Good luck, August

[Rabe]

thanks for your help, it did work:) now it's time to continue my studies on the java 3d tutorial:)