Thread: Something wrong with the import things

Hi
i try to run the program below, but i don't know why i can't run it.
There is something wrong with the import com.sun.j3d, how can i fix it?
Thank you

import java.applet.Applet;
import java.awt.*;
import java.awt.event.*;
 
import javax.media.j3d.*;
import javax.vecmath.*;
 
import com.sun.j3d.utils.applet.MainFrame;
 
import com.sun.j3d.loaders.objectfile.ObjectFile;
import com.sun.j3d.loaders.Scene;
 
import javax.swing.JFrame;
import javax.swing.WindowConstants;
 
/**
* Renders a 3D shape using a 3D rendering engine
* that was written from scratch using AWT for
* graphics operations.
*/
public class main extends JFrame
{
	private static int 				m_kWidth = 400;
	private static int 				m_kHeight = 400;
 
   private RenderingEngine			renderingEngine = new AwtRenderingEngine();
   private GeometryUpdater			geometryUpdater = new RotatingGeometryUpdater();
   private RenderingSurface		renderingSurface;
 
	public main( )
	{
   	// load the object file
		Scene scene = null;
		Shape3D shape = null;
 
		// read in the geometry information from the data file
		ObjectFile objFileloader = new ObjectFile( ObjectFile.RESIZE );
 
		try
		{
			scene = objFileloader.load( "hand1.obj" );
		}
		catch ( Exception e )
		{
			scene = null;
			System.err.println( e );
		}
 
		if( scene == null )
			System.exit( 1 );
 
		// retrieve the Shape3D object from the scene
		BranchGroup branchGroup = scene.getSceneGroup( );
		shape = (Shape3D) branchGroup.getChild( 0 );
 
       GeometryArray geometryArray = (GeometryArray) shape.getGeometry();
 
       // add the geometry to the rendering engine...       
       renderingEngine.addGeometry( geometryArray );
 
       // create a rendering surface and bind the rendering engine
       renderingSurface = new RenderingSurface( renderingEngine, geometryUpdater );
 
       // start the rendering surface and add it to the content panel
       renderingSurface.start();
       getContentPane().add( renderingSurface );
 
    	// disable automatic close support for Swing frame.
		setDefaultCloseOperation( WindowConstants.DO_NOTHING_ON_CLOSE );
 
		// adds the window listener
		addWindowListener( 
			new WindowAdapter()
			{
				// handles the system exit window message
				public void windowClosing( WindowEvent e )
				{
					System.exit( 0 );				
               }
			}
		);
	}
 
	public static void main( String[] args )
	{
		main main = new main();
		main.setTitle( "3D" );
		main.setSize( 300, 300 );
		main.setVisible( true );
	}
}

Here is the hand1.obj

i have added j3dtree.jar