how to use the Xith3D in the eclipse

I download the xith3d from svn,but I don't know how to begin with it.I built the project that like this :

Code:

import java.io.File;
import javax.vecmath.Vector3f;
import net.jtank.input.KeyCode;
import org.xith3d.geometry.Cube;
import org.xith3d.loaders.texture.TextureLoader;
import org.xith3d.loaders.texture.TextureStreamLocatorFile;
import org.xith3d.render.base.Xith3DEnvironment;
import org.xith3d.render.canvas.Canvas3DWrapper;
import org.xith3d.render.canvas.Canvas3DWrapper.Resolution;
import org.xith3d.render.loop.RenderLoop;
import org.xith3d.scenegraph.BranchGroup;
public class TestXith extends RenderLoop
{
    public void onKeyReleased(int key)
    {
        switch (key)
        {
            case KeyCode.VK_ESCAPE:
                this.end();
                break;
        }
    }
    private BranchGroup createScene()
    {
        Cube cube = new Cube( "stone.jpg", false, 3.0f );        BranchGroup bg = new BranchGroup();
        bg.addChild( cube );
        return( bg );
    }
    public XithTest()
    {
        super( 128L );
        Xith3DEnvironment env = new Xith3DEnvironment( new Vector3f( 3f, 2f, 5f ),
                                                       new Vector3f( 0f, 0f, 0f ),
                                                       new Vector3f( 0f, 1f, 0f ),
                                                       this );
        Canvas3DWrapper canvas = Canvas3DWrapper.createStandalone(
                                                 Resolution.RES_800X600,
                                                 "My empty scene" );
        this.registerKeyboardAndMouse( canvas );
        env.addCanvas( canvas );
        TextureLoader.getInstance().addTextureStreamLocator(
                   new TextureStreamLocatorFile( new File( "demo/textures") ) );
        env.addPerspectiveBranch( createScene() );
        this.begin();
    }
    public static void main(String[] args)
    {
        new XithTest();
    }
}

But there are lots problems,such as there are not exist the followed libs:
import net.jtank.input.KeyCode;
import org.xith3d.geometry.Cube;

please give me some suggestions!thanks vary much