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:

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:)