Java 3D code giving java.lang.UnsatisfiedLinkError

Question

I am trying to run the following Java 3D sample code. I am referring 3 jars and 1 dll folder. Their names are as follows :-

1. vecmath.jar
2. j3d-core-1.3.1.jar
3. j3dutils.jar
4. j3dcore-ogl.dll (I also tried referring a jar file instead of this dll file. The jar file is j3dcore-d3d_dll.jar).

I have also tried placing them on bin and lib folders of jdk and jre.

I have also added the path of the that j3dcore-ogl.dll file in the system environment variable named "Path". Later on I tried replacing it with the path of j3dcore-d3d_dll.jar file.

The code is as follows :-

import java.applet.Applet;
import java.awt.BorderLayout;
import java.awt.Button;
import java.awt.GraphicsConfiguration;
import java.awt.Panel;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;

import javax.media.j3d.AmbientLight;
import javax.media.j3d.BoundingSphere;
import javax.media.j3d.BranchGroup;
import javax.media.j3d.Canvas3D;
import javax.media.j3d.DirectionalLight;
import javax.media.j3d.Transform3D;
import javax.media.j3d.TransformGroup;
import javax.swing.Timer;
import javax.vecmath.Color3f;
import javax.vecmath.Point3d;
import javax.vecmath.Vector3d;
import javax.vecmath.Vector3f;

import com.sun.j3d.utils.applet.MainFrame;
import com.sun.j3d.utils.geometry.Sphere;
import com.sun.j3d.utils.universe.SimpleUniverse;

public class InteractiveAnimation extends Applet implements ActionListener, KeyListener {

    private static final long serialVersionUID = 1L;

    private Button go = new Button("Go");

  private TransformGroup objTrans;

  private Transform3D trans = new Transform3D();

  private float height = 0.0f;

  private float sign = 1.0f; // going up or down

  private Timer timer;

  private float xloc = 0.0f;

  public BranchGroup createSceneGraph() {
    // Create the root of the branch graph
    BranchGroup objRoot = new BranchGroup();
    objTrans = new TransformGroup();
    objTrans.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
    objRoot.addChild(objTrans);

    // Create a simple shape leaf node, add it to the scene graph.
    Sphere sphere = new Sphere(0.25f);
    objTrans = new TransformGroup();
    objTrans.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
    Transform3D pos1 = new Transform3D();
    pos1.setTranslation(new Vector3f(0.0f, 0.0f, 0.0f));
    objTrans.setTransform(pos1);
    objTrans.addChild(sphere);
    objRoot.addChild(objTrans);
    BoundingSphere bounds = new BoundingSphere(new Point3d(0.0, 0.0, 0.0),
        100.0);

    Color3f light1Color = new Color3f(1.0f, 0.0f, 0.2f);
    Vector3f light1Direction = new Vector3f(4.0f, -7.0f, -12.0f);
    DirectionalLight light1 = new DirectionalLight(light1Color,
        light1Direction);
    light1.setInfluencingBounds(bounds);
    objRoot.addChild(light1);

    // Set up the ambient light
    Color3f ambientColor = new Color3f(1.0f, 1.0f, 1.0f);
    AmbientLight ambientLightNode = new AmbientLight(ambientColor);
    ambientLightNode.setInfluencingBounds(bounds);
    objRoot.addChild(ambientLightNode);

    return objRoot;
  }

  public InteractiveAnimation() {
    setLayout(new BorderLayout());
    GraphicsConfiguration config = SimpleUniverse
        .getPreferredConfiguration();
    Canvas3D c = new Canvas3D(config);
    add("Center", c);
    c.addKeyListener(this);
    timer = new Timer(100, this);
    //timer.start();
    Panel p = new Panel();
    p.add(go);
    add("North", p);
    go.addActionListener(this);
    go.addKeyListener(this);
    // Create a simple scene and attach it to the virtual universe
    BranchGroup scene = createSceneGraph();

    SimpleUniverse u = new SimpleUniverse(c);
    u.getViewingPlatform().setNominalViewingTransform();
    u.addBranchGraph(scene);
  }

  public void keyPressed(KeyEvent e) {
    //Invoked when a key has been pressed.
    if (e.getKeyChar() == 's') {
      xloc = xloc + .1f;
    }
    if (e.getKeyChar() == 'a') {
      xloc = xloc - .1f;
    }
  }

  public void keyReleased(KeyEvent e) {
    // Invoked when a key has been released.
  }

  public void keyTyped(KeyEvent e) {
    //Invoked when a key has been typed.
  }

  public void actionPerformed(ActionEvent e) {
    // start timer when button is pressed
    if (e.getSource() == go) {
      if (!timer.isRunning()) {
        timer.start();
      }
    } else {
      height += .1 * sign;
      if (Math.abs(height * 2) >= 1)
        sign = -1.0f * sign;
      if (height < -0.4f) {
        trans.setScale(new Vector3d(1.0, .8, 1.0));
      } else {
        trans.setScale(new Vector3d(1.0, 1.0, 1.0));
      }
      trans.setTranslation(new Vector3f(xloc, height, 0.0f));
      objTrans.setTransform(trans);
    }
  }

  public static void main(String[] args) {
    System.out.println("Program Started");
    InteractiveAnimation bb = new InteractiveAnimation();
    bb.addKeyListener(bb);
    MainFrame mf = new MainFrame(bb, 256, 256);
  }
}

When I execute this, I get the following exception stack trace :-

Exception in thread "main" java.lang.UnsatisfiedLinkError: no J3D in java.library.path at java.lang.ClassLoader.loadLibrary(Unknown Source) at java.lang.Runtime.loadLibrary0(Unknown Source) at java.lang.System.loadLibrary(Unknown Source) at javax.media.j3d.MasterControl$22.run(MasterControl.java:889) at java.security.AccessController.doPrivileged(Native Method) at javax.media.j3d.MasterControl.loadLibraries(MasterControl.java:886) at javax.media.j3d.VirtualUniverse.(VirtualUniverse.java:229) at InteractiveAnimation.(InteractiveAnimation.java:84) at InteractiveAnimation.main(InteractiveAnimation.java:143)

What should I do to run this program ?

Answer 1

Install Java 3D (latest version), rather than placing jars.