ok but I don't see where tu put it, how to use it
 I tried here, but the application still fails:

package com.example.jpct;

import java.io.IOException;
    import java.io.InputStream;
    import java.io.UnsupportedEncodingException;
    import java.lang.reflect.Field;

    import javax.microedition.khronos.egl.EGL10;
    import javax.microedition.khronos.egl.EGLConfig;
    import javax.microedition.khronos.egl.EGLDisplay;
    import javax.microedition.khronos.opengles.GL10;

    import android.app.Activity;
    import android.content.res.AssetManager;
    import android.opengl.GLSurfaceView;
    import android.os.Bundle;
    import android.view.MotionEvent;

    import com.threed.jpct.Camera;
    import com.threed.jpct.FrameBuffer;
    import com.threed.jpct.Light;
    import com.threed.jpct.Loader;
    import com.threed.jpct.Logger;
    import com.threed.jpct.Object3D;
    import com.threed.jpct.Primitives;
    import com.threed.jpct.RGBColor;
    import com.threed.jpct.SimpleVector;
    import com.threed.jpct.Texture;
    import com.threed.jpct.TextureManager;
    import com.threed.jpct.World;
    import com.threed.jpct.util.BitmapHelper;
    import com.threed.jpct.util.MemoryHelper;
    import java.io.*;


    import com.threed.jpct.*;

    import android.content.res.Resources;
    import android.opengl.GLSurfaceView.EGLConfigChooser;
    import android.opengl.GLSurfaceView.Renderer;
    import android.util.Log;

     /**
     * A simple demo. This shows more how to use jPCT-AE than it shows how to write
     * a proper application for Android. It includes basic activity management to
     * handle pause and resume...
     *
     * @author EgonOlsen
     *
     */
    public class HelloWorld extends Activity {

// Used to handle pause and resume...
private static HelloWorld master = null;

private GLSurfaceView mGLView;
private MyRenderer renderer = null;
private FrameBuffer fb = null;
private World world = null;
private RGBColor back = new RGBColor(50, 50, 100);

private float touchTurn = 0;
private float touchTurnUp = 0;

private float xpos = -1;
private float ypos = -1;

private Object3D cube = null;
private int fps = 0;

private Light sun = null;

AssetManager assMan;
InputStream is;

private String thingName = "index.3ds";
private int thingScale = 1;//end


protected void onCreate(Bundle savedInstanceState) {

Logger.log("onCreate");

if (master != null) {
copy(master);
}

super.onCreate(savedInstanceState);
mGLView = new GLSurfaceView(getApplication());

mGLView.setEGLConfigChooser(new GLSurfaceView.EGLConfigChooser() {
public EGLConfig chooseConfig(EGL10 egl, EGLDisplay display) {
// Ensure that we get a 16bit framebuffer. Otherwise, we'll fall
// back to Pixelflinger on some device (read: Samsung I7500)
int[] attributes = new int[] { EGL10.EGL_DEPTH_SIZE, 16, EGL10.EGL_NONE };
EGLConfig[] configs = new EGLConfig[1];
int[] result = new int[1];
egl.eglChooseConfig(display, attributes, configs, 1, result);
return configs[0];
}
});

renderer = new MyRenderer();
mGLView.setRenderer(renderer);
setContentView(mGLView);
}

@Override
protected void onPause() {
super.onPause();
mGLView.onPause();
}

@Override
protected void onResume() {
super.onResume();
mGLView.onResume();
}

@Override
protected void onStop() {
super.onStop();
}

private void copy(Object src) {
try {
Logger.log("Copying data from master Activity!");
Field[] fs = src.getClass().getDeclaredFields();
for (Field f : fs) {
f.setAccessible(true);
f.set(this, f.get(src));
}
} catch (Exception e) {
throw new RuntimeException(e);
}
}

public boolean onTouchEvent(MotionEvent me) {

if (me.getAction() == MotionEvent.ACTION_DOWN) {
xpos = me.getX();
ypos = me.getY();
return true;
}

if (me.getAction() == MotionEvent.ACTION_UP) {
xpos = -1;
ypos = -1;
touchTurn = 0;
touchTurnUp = 0;
return true;
}

if (me.getAction() == MotionEvent.ACTION_MOVE) {
float xd = me.getX() - xpos;
float yd = me.getY() - ypos;

xpos = me.getX();
ypos = me.getY();

touchTurn = xd / -100f;
touchTurnUp = yd / -100f;
return true;
}

try {
Thread.sleep(15);
} catch (Exception e) {
// No need for this...
}

return super.onTouchEvent(me);
}

protected boolean isFullscreenOpaque() {
return true;
}

class MyRenderer implements GLSurfaceView.Renderer {

private long time = System.currentTimeMillis();

public MyRenderer() {
}

public void onSurfaceChanged(GL10 gl, int w, int h) {
if (fb != null) {
fb.dispose();
}
fb = new FrameBuffer(gl, w, h);

if (master == null) {

world = new World();
world.setAmbientLight(20, 20, 20);

sun = new Light(world);
sun.setIntensity(250, 250, 250);

// Create a texture out of the icon...:-)
Texture texture = new Texture(BitmapHelper.rescale(BitmapHelper.convert(getResources().getDrawable(R.drawable.ic_launcher)), 64, 64));
TextureManager.getInstance().addTexture("texture", texture);


try {
cube = loadModel("assets/" + thingName + ".3ds", thingScale);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

//Primitives.getCube(10);
//cube.calcTextureWrapSpherical();
//cube.setTexture("texture");
//cube.strip();
cube.build();

world.addObject(cube);

Camera cam = world.getCamera();
cam.moveCamera(Camera.CAMERA_MOVEOUT, 50);
cam.lookAt(cube.getTransformedCenter());

SimpleVector sv = new SimpleVector();
sv.set(cube.getTransformedCenter());
sv.y -= 100;
sv.z -= 100;
sun.setPosition(sv);
MemoryHelper.compact();

if (master == null) {
Logger.log("Saving master Activity!");
master = HelloWorld.this;
}
}
}

public void onSurfaceCreated(GL10 gl, EGLConfig config) {
}

public void onDrawFrame(GL10 gl) {
if (touchTurn != 0) {
cube.rotateY(touchTurn);
touchTurn = 0;
}

if (touchTurnUp != 0) {
cube.rotateX(touchTurnUp);
touchTurnUp = 0;
}

fb.clear(back);
world.renderScene(fb);
world.draw(fb);
fb.display();

if (System.currentTimeMillis() - time >= 1000) {
Logger.log(fps + "fps");
fps = 0;
time = System.currentTimeMillis();
}
fps++;
}

   private Object3D loadModel(String filename, float scale) throws IOException {
   
   InputStream stream = getResources().getAssets().open(filename);

        Object3D[] model = Loader.load3DS(stream, scale);
        Object3D o3d = new Object3D(0);
        Object3D temp = null;
        for (int i = 0; i < model.length; i++) {
            temp = model[i];
            temp.setCenter(SimpleVector.ORIGIN);
            temp.rotateX((float)( -.5*Math.PI));
            temp.rotateMesh();
            temp.setRotationMatrix(new Matrix());
            o3d = Object3D.mergeObjects(o3d, temp);
            o3d.build();
        }
        return o3d;
    }

    }
    }

here the LogCat

FATAL EXCEPTION: main
 java.lang.RuntimeException: Unable to instantiate activity ComponentInfo java.lang.ClassNotFoundException: com.example.jpct.MainActivity in loader dalvik.system.PathClassLoader[/data/app/com.example.jpct-2.apk]
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1573)
  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1667)
at android.app.ActivityThread.access$1500(ActivityThread.java:117)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:935)
  at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:123)
at android.app.ActivityThread.main(ActivityThread.java:3691)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:507)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:847)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:605)
  at dalvik.system.NativeStart.main(Native Method)
 Caused by: java.lang.ClassNotFoundException: com.example.jpct.MainActivity in loader dalvik.system.PathClassLoader[/data/app/com.example.jpct-2.apk]
at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:240)
  at java.lang.ClassLoader.loadClass(ClassLoader.java:551)
at java.lang.ClassLoader.loadClass(ClassLoader.java:511)
at android.app.Instrumentation.newActivity(Instrumentation.java:1021)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1565)
... 11 more


I try to load a 3d model in jpct-ae.
I looked at all the tutorials and I think I understood, but I don't succeed to use the 3d files I have.

Indeed, I use the code that I found on this forum and which is present on tutorials for jpct. (-> http://www.jpct.net/forum2/index.php/topic,2076.msg15290/topicseen.html#msg15290)

Normally, it's working and it's without errors.

these is the code

    package com.example.jpct;

    import java.io.*;

    import java.lang.reflect.Field;
    import javax.microedition.khronos.egl.EGL10;
    import javax.microedition.khronos.egl.EGLConfig;
    import javax.microedition.khronos.egl.EGLDisplay;
    import javax.microedition.khronos.opengles.GL10;

    import com.threed.jpct.*;

    import android.app.Activity;
    import android.opengl.GLSurfaceView;
    import android.os.Bundle;
    import android.view.MotionEvent;
    import android.content.res.AssetManager;
    import android.content.res.Resources;
    import android.opengl.GLSurfaceView.EGLConfigChooser;
    import android.opengl.GLSurfaceView.Renderer;
    import android.util.Log;

     public class MainActivity extends Activity {
    private String thingName = "exquisit3dchair";
    private int thingScale = 1;//end
private static MainActivity master = null;

private GLSurfaceView mGLView;
private MyRenderer renderer = null;
private FrameBuffer buffer = null;

private World world = null;
private RGBColor back = new RGBColor(50, 50, 100);

private float touchTurn = 0;
private float touchTurnUp = 0;

private float xpos = -1;
private float ypos = -1;

private Object3D thing = null;
private int fps = 0;

private Light sun = null;
private Camera cam = null;

AssetManager assMan;
InputStream is;
protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);
mGLView = new GLSurfaceView(getApplication());
renderer = new MyRenderer();
mGLView.setRenderer(renderer);
setContentView(mGLView);
}

@Override
protected void onPause() {
super.onPause();
mGLView.onPause();
}

@Override
protected void onResume() {
super.onResume();
mGLView.onResume();
}

protected void onStop() {
super.onStop();
}

public boolean onTouchEvent(MotionEvent me) {

if (me.getAction() == MotionEvent.ACTION_DOWN) {
xpos = me.getX();
ypos = me.getY();
return true;
}

if (me.getAction() == MotionEvent.ACTION_UP) {
xpos = -1;
ypos = -1;
touchTurn = 0;
touchTurnUp = 0;
return true;
}

if (me.getAction() == MotionEvent.ACTION_MOVE) {
float xd = me.getX() - xpos;
float yd = me.getY() - ypos;

xpos = me.getX();
ypos = me.getY();

touchTurn = xd / -100f;
touchTurnUp = yd / -100f;
return true;
}

try {
Thread.sleep(15);
} catch (Exception e) {
// No need for this...
}

return super.onTouchEvent(me);
}

protected boolean isFullscreenOpaque() {
return true;
}

class MyRenderer implements GLSurfaceView.Renderer {

private long time = System.currentTimeMillis();
private boolean stop = false;

public MyRenderer() {
}

public void stop() {
stop = true;
}

public void onSurfaceChanged(GL10 gl, int w, int h) {
if (buffer != null) {
buffer.dispose();
}
buffer = new FrameBuffer(gl, w, h);

if (master == null) {

world = new World();
        world.setAmbientLight(150, 150, 150);

sun = new Light(world);
sun.setIntensity(250, 250, 250);

thing = loadModel("res/" + thingName + ".3ds", thingScale);
        thing.build();

world.addObject(thing);

cam = world.getCamera();
cam.moveCamera(Camera.CAMERA_MOVEOUT, 50);
cam.lookAt(thing.getTransformedCenter());

SimpleVector sv = new SimpleVector();
sv.set(thing.getTransformedCenter());
sv.y -= 100;
sv.z -= 100;
sun.setPosition(sv);
//MemoryHelper.compact();

if (master == null) {
Logger.log("Saving master Activity!");
master = MainActivity.this;
}
}
}

public void onSurfaceCreated(GL10 gl, EGLConfig config) {
}

public void onDrawFrame(GL10 gl) {

try {
if (!stop) {
if (touchTurn != 0) {
thing.rotateY(touchTurn);
touchTurn = 0;
}

if (touchTurnUp != 0) {
thing.rotateX(touchTurnUp);
touchTurnUp = 0;
}

buffer.clear(back);
world.renderScene(buffer);
world.draw(buffer);
buffer.display();

if (System.currentTimeMillis() - time >= 1000) {
Logger.log(fps + "fps");
fps = 0;
time = System.currentTimeMillis();
}
fps++;
} else {
if (buffer != null) {
buffer.dispose();
buffer = null;
}
}
} catch (Exception e) {
Logger.log(e, Logger.MESSAGE);
}
}

    private Object3D loadModel(String filename, float scale) {
assMan = getResources().getAssets();
is= new InputStream() {
@Override
public int read() throws IOException {
return 0;
}
};
        Object3D[] model = Loader.load3DS(is,scale);
        Object3D o3d = new Object3D(0);
        Object3D temp = null;
        for (int i = 0; i < model.length; i++) {
            temp = model[i];
            temp.setCenter(SimpleVector.ORIGIN);
            temp.rotateX((float)( -.5*Math.PI));
            temp.rotateMesh();
            temp.setRotationMatrix(new Matrix());
            o3d = Object3D.mergeObjects(o3d, temp);
            o3d.build();
        }
        return o3d;
    }
}
     }
As you see, I use one object: exquisitchair.3ds, that I have found on this site:

http://thefree3dmodels.com/stuff/furniture/exquisite_3d_chair/12-1-0-120

My problem is simple: How tu put his file in Eclipse ?

I have tried in the "res" directory, it's said error, "invalid resource directory name", I have tried without the extension, I have tried other 3dfiles, and I have tried to create a "raw directory" or an example directory and to change the path.
But the problem remains the same.

The code has nos errors, but of course I couldn't compile for the moment.

Can you help me please ?