How to create a java plugin for Internet explorer

Question

Hi All,
I have recently started working on java,i need to a create a plugin which can launch any file type(say any file which draws a cube with some extension .abc).Where should i start my work from.What do i need to do first.Please help me out coz it is very important for my project work.
Any suggestions would be much appreciated.
Regards,
Deepti.

Answer 1

Hi Viravan,
I signed my applet as u said but for some reason the browser is not recognising the cert.The applet is reading a wrl file from my local C drive.I'm creating a plugin to show this applet in the browser window.this is all i have to do.i guess u will have an idea by looking at this program of mine.
Curves.wrl is the file which i'm reading from the Cdrive.
i even changed my policy file but in vain.
JAVA CODE
import java.awt.BorderLayout;
import com.sun.j3d.utils.applet.MainFrame;
import com.sun.j3d.utils.universe.*;
import javax.media.j3d.*;
import javax.vecmath.*;
import javax.vecmath.Point3d;
import com.sun.j3d.loaders.Scene;
import java.awt.GraphicsConfiguration;
import java.io.*;
import com.sun.j3d.loaders.vrml97.VrmlLoader;
import com.sun.j3d.loaders.Scene;
import com.sun.j3d.utils.behaviors.mouse.*;
import com.sun.j3d.utils.geometry.ColorCube;
import java.lang.*;
import java.applet.*;
import java.net.URL;
     public class Vrml2 extends Applet {
     private SimpleUniverse u=null;
     public BranchGroup createSceneGraph() {
     BranchGroup objRoot = new BranchGroup();
     //TransformGroup objScale = new TransformGroup();
     //Transform3D t3d = new Transform3D();
     //t3d.setScale(0.3);
     //objScale.setTransform(t3d);
     //objRoot.addChild(objScale);
     BoundingSphere bounds = new BoundingSphere(new Point3d(0.0,0.0,0.0),      100.0);
     Color3f bgColor = new Color3f(1.0f,1.0f,1.0f);
     Background bg = new Background(bgColor);
     bg.setApplicationBounds(bounds);
     objRoot.addChild(bg);
     Color3f light1Color = new Color3f(1.0f, 1.0f, 0.9f);
     Vector3f light1Direction = new Vector3f(4.0f, -7.0f, -12.0f);
     DirectionalLight light1 = new DirectionalLight(light1Color,      light1Direction);
     light1.setInfluencingBounds(bounds);
     objRoot.addChild(light1);
     TransformGroup objTrans = new TransformGroup();
     objTrans.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
     objTrans.setCapability(TransformGroup.ALLOW_TRANSFORM_READ);
     objTrans.setCapability(ColoringAttributes.ALLOW_COLOR_READ);     objTrans.setCapability(ColoringAttributes.ALLOW_COLOR_WRITE);     objTrans.setCapability(Material.ALLOW_COMPONENT_READ);     
     objTrans.setCapability(Material.ALLOW_COMPONENT_WRITE);
     objTrans.setCapability(TransformGroup.ENABLE_PICK_REPORTING);
     //objScale.addChild(objTrans);
     objRoot.addChild(objTrans);
     VrmlLoader loader = new VrmlLoader();
     Scene s = null;
     try {
          s = loader.load("c:/documents and      settings/dk27/morph/curves.wrl");
     catch (SecurityException e) {
          System.out.println(" caught security exception by deepti");
          System.out.println(e);
     catch (Exception e) {
          System.out.println("Exception caught");
          System.err.println(e);
          System.exit(1);
     //objTrans.addChild(new ColorCube(0.2));
     objTrans.addChild(s.getSceneGroup());
     Transform3D yAxis = new Transform3D();
     Transform3D tr3d=new Transform3D();
     tr3d.lookAt(new Point3d(13.00,-2.5,11.83),new Point3d      (20.0,0.0,50.0),new Vector3d(0.0,1.0,0.0));
     tr3d.invert();          
     //to rotate the cone left button
     MouseRotate behavior = new MouseRotate();
     behavior.setTransformGroup(objTrans);
     objTrans.addChild(behavior);
     behavior.setSchedulingBounds(bounds);
     //to zoom the cone middle button
     MouseZoom behavior1=new MouseZoom();
     behavior1.setTransformGroup(objTrans);
     objTrans.addChild(behavior1);
     behavior1.setSchedulingBounds(bounds);
     //to translate the cone right button
     MouseTranslate behavior2=new MouseTranslate();
     behavior2.setTransformGroup(objTrans);
     objTrans.addChild(behavior2);
     behavior2.setSchedulingBounds(bounds);
     objRoot.compile();
     return objRoot;
     public Vrml2() {
     public void init(){
     setLayout(new BorderLayout());
     GraphicsConfiguration config=SimpleUniverse.getPreferredConfiguration     ();
     Canvas3D c = new Canvas3D(config);
     add("Center", c);
     BranchGroup scene = createSceneGraph();
     SimpleUniverse u = new SimpleUniverse(c);
     u.getViewingPlatform().setNominalViewingTransform();
     u.addBranchGraph(scene);
     public void destroy(){
     u.removeAllLocales();
     public static void main(String[] args) {
     new MainFrame(new Vrml2(),600,800);
APPLET CODE:
<HTML>
<HEAD>
<TITLE>Morphing Applet</TITLE>
</HEAD>
<BODY>
<APPLET CODE = "Vrml2" CODEBASE = "." ARCHIVE = "Vrml2.jar" WIDTH = 202 HEIGHT = 177>
</APPLET>
</BODY>
</HTML>
the errors that it is displaying are
java.security.cert.CertificateException: Unable to verify the certificate with root CA
     at sun.plugin.security.TrustDecider.isAllPermissionGranted(Unknown Source)
     at sun.plugin.security.PluginClassLoader.getPermissions(Unknown Source)
     at java.security.SecureClassLoader.getProtectionDomain(SecureClassLoader.java:162)
     at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:111)
     at java.net.URLClassLoader.defineClass(URLClassLoader.java:248)
     at java.net.URLClassLoader.access$100(URLClassLoader.java:56)
     at java.net.URLClassLoader$1.run(URLClassLoader.java:195)
     at java.security.AccessController.doPrivileged(Native Method)
     at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
     at sun.applet.AppletClassLoader.findClass(AppletClassLoader.java:128)
     at sun.plugin.security.PluginClassLoader.findClass(Unknown Source)
     at java.lang.ClassLoader.loadClass(ClassLoader.java:297)
     at sun.applet.AppletClassLoader.loadClass(AppletClassLoader.java:108)
     at java.lang.ClassLoader.loadClass(ClassLoader.java:253)
     at sun.applet.AppletClassLoader.loadCode(AppletClassLoader.java:373)
     at sun.applet.AppletPanel.createApplet(AppletPanel.java:579)
     at sun.plugin.AppletViewer.createApplet(Unknown Source)
     at sun.applet.AppletPanel.runLoader(AppletPanel.java:515)
     at sun.applet.AppletPanel.run(AppletPanel.java:293)
     at java.lang.Thread.run(Thread.java:484)
java.lang.ExceptionInInitializerError: java.security.AccessControlException: access denied (java.lang.RuntimePermission modifyThreadGroup)
     at java.security.AccessControlContext.checkPermission(AccessControlContext.java:272)
     at java.security.AccessController.checkPermission(AccessController.java:399)
     at java.lang.SecurityManager.checkPermission(SecurityManager.java:545)
     at sun.applet.AppletSecurity.checkAccess(AppletSecurity.java:139)
     at java.lang.ThreadGroup.checkAccess(ThreadGroup.java:279)
     at java.lang.ThreadGroup.getParent(ThreadGroup.java:140)
     at javax.media.j3d.MasterControl$23.run(MasterControl.java:3077)
     at java.security.AccessController.doPrivileged(Native Method)
     at javax.media.j3d.MasterControl.<clinit>(MasterControl.java:3070)
     at javax.media.j3d.VirtualUniverse.<clinit>(VirtualUniverse.java:206)
     at Vrml4.init(Vrml4.java:110)
     at sun.applet.AppletPanel.run(AppletPanel.java:344)
     at java.lang.Thread.run(Thread.java:484)
Exception:java.io.FileNotFoundException: D:\JDK13~1.1\lib\flavormap.properties (The system cannot find the file specified) while loading default flavormap.properties file URL:file:D:\JDK13~1.1\lib\flavormap.properties