Applet works in all netscapes but not IE 6 -- help

I have a simple applet that works wonderfully in all versions of netscape. The plug-ins are installed. I am running under windows 98.
The settings are configured to allow Java for both sets of browsers.
What I get is a grey screen. No loading message -- nothing.
Yet under netscape is comes right up...same code.
HELP!

Thanks. Unfortunately I did do that, and it still did not work. Plus the fact, I want my viewers
to be able to SEE the applet -- which is a custom menu. They are not going to want to do this work, so it must be able to function in older versions of plug-ins.
Frustrating, but we have to consider not everyone will work in the lastest vesions of software.

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My applet works in the appletviewer but not in the navigator

My applet works in the appletviewer but not in the navigator
exceptions problem1 and problem2 are throwed
this is my code
import java.applet.*;
import java.net.*;
import java.io.*;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class ValiderHtml extends Applet implements ActionListener {
JButton send =new JButton("Connexion");
JScrollPane jscrollpane= new JScrollPane();
DefaultListModel lignes=new DefaultListModel();
JList lstURL = new JList(lignes);
BufferedReader reader = null;
String ligne;
URL url;
URLConnection conn;
   public void init(){
   this.setSize(900,400);
   setLayout( new GridLayout(2,1));
   jscrollpane.setBounds(new Rectangle(19,53,160,73));
   jscrollpane.getViewport().add(lstURL,null);
   send.addActionListener(this);
        this.add(send);
   this.add(jscrollpane);
    public void actionPerformed(ActionEvent evt) {
         Send();
   public void Send(){
        try {
   url=new URL("http://www.developpez.com");
   conn = url.openConnection();
   reader = new BufferedReader(new InputStreamReader(conn.getInputStream()));
while ((ligne = reader.readLine()) != null) {
                 lignes.addElement(ligne);
    }//fin bloc try
   catch (Exception e) {
               lignes.addElement("probleme1");
            finally{
               try{reader.close();}catch(Exception e){ lignes.addElement("probleme2");}
   }// fin Send
      public void paint(Graphics g) {
            super.paint(g);
}// fin Applet

As for tracking the source of your problem your applet sucks.
Try e.printStackTrace() on a cought exception and check the (full) trace.
url=new URL("http://www.developpez.com");
Unless yor applet is on www.developpez.com this will throw an exception in an unsigned
applet without special policies.
Signing applets:
http://forum.java.sun.com/thread.jsp?forum=63&thread=524815
second post and last post for the java class file
http://forum.java.sun.com/thread.jsp?forum=63&thread=409341
4th post explaining how to set up your own policy with your own keystore

Applets work under older compilers, but not newest

The applets I compile using the latest release of javac (with the JDK 1.4 package) work in the appletviewer but not in IE 6.0. However, if I use an older version of javac from a couple years ago (not sure the version), the applets work in IE suddenly. Is there something I need to install in IE to make it compatible with the Sun 1.4 javac compiler? Should I just reinstall the JRE? Has anyone heard of this before? Thanks!!

You could try installing the Java 1.4 plugin.
http://java.sun.com/getjava/

Applet using sockets works perfectly under Netscape but not under IE

I have setup a java applet compiled with Sun Forte which implements a connection with a server application with sockets. The applet works perfectly on the same machine when it is loaded from netscape communicator but I receive an com.ms.security.SecurityExceptionEx security error when I am trying to connect on 127.0.0.1:7000. How can I solve this problem I have with IE. I would like to thank you on advanced.

Hi,
if ur applet want to open socket in IE you need to import microsoft java package which is in Microsoft SDK for Java 4.0.
import com.ms.security.*;
try {
if (Class.forName("com.ms.security.PolicyEngine") != null) {
PolicyEngine.assertPermission(PermissionID.NETIO);
} catch (Throwable cnfe) {
System.err.println( cnfe.toString() );
you have to write above code and compile the java file by using jvc.exe which in Microsoft SDK for Java 4.0.
You can download Microsoft SDK for Java 4.0 from microsoft site.
try & all the best
sundaram

Applet using sockets works perfectly under Netscape but not under IE securi

I have setup a java applet compiled with Sun Forte which implements a connection with a server application with sockets. The applet works perfectly on the same machine when it is loaded from netscape communicator but I receive an com.ms.security.SecurityExceptionEx security error when I am trying to connect on 127.0.0.1:7000. How can I solve this problem I have with IE. I would like to thank you on advanced.

for ie you need a certificate that tells ie the applet if safe and allowed to open system-resources.
take a look on the Forum: Signed Applets.
regards

Applet work with JRE 7_51 but NOT with JRE 7_45

Hello,
My major problem is, that my Applet signed with COMODO certificate DOES NOT WORK with JRE 7_45.
The SAME applet works fine with JRE 7_45, if I sign this applet WITH A SELFMADE UNTRUSTED certificate.
WHY the comodo signed applet doesn't run in JRE 7_45 ???
If i launch the comodo signed applet with JRE 7_51 it works perfect !!!
But in our company we got JRE 7_45 and I have to deal with JRE 7_45. That’s my problem.
Could you please tell me a solution what I have to do that the comodo signed applet works also in JRE 7_45.
Thank you!
Philipp

Thanks gimbal2.
I agree the problem may be in the proxy or in the firewall but I don' to know how to prove it as if i call the servlet url from browser I dont have problems .
The version im using is 6.45 but im sure the same problem occurs also with other versions of JRE6 .
... and the problem disappear with JRE7 ...
trouble is my company want people to use JRE6
any idea ?
Gio

Applet Working in MS-DOS, but Not in my Browser

Hello!
The applet builds a String that is displayed in the MS-DOS
console window; but when I use my browser, I see no Java console.
I am using J2SDK1.4.0_02. Do I need something else for my applet
to work properly in my browser?
Please, help. Thanks.
Alex

There's 2 ways to fix this.
Assuming you're using an up-to-date version of Internet Explorer and Sun's VM, you need to go to Start--> Settings--> Control Panel-->
and double-click Java Plug-in 1.4.0.
Click Browser and make sure that the Microsoft Internet Explorer box
is checked.
This will use Sun's Java Plug-in all the time which may not be what you
want (as this can break other stuff).
The other way to fix it is to add some tags to the HTML file (which may also fix the problem if you are using Microsoft's VM).
Use "OBJECT" instead of "APPLET".
And make sure you have the following tags defined: "CLASSID", "CODE", and "TYPE". Your value for CLASSID could be different.
Something like:
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<HEAD>
<TITLE>Jumbo's First Class</TITLE>
</HEAD>
<BODY>
<H1>Brenda Pads Her Keys</H1>
"Drat!" exclaimed Jumbo. "This stupid machine."<BR>
Brenda rolled her eyes, as if to say "What now?" and inquired
in her most soothing, customer-service voice, "Problem, J.G.?"<P>
Jumbo, perhaps a tad unresonably, bit back. "I don;t have a problem.
It's this moronic prototype. Why does it let me type in letters if all
it can use is numbers? Who designed this anyhow?"<BR>
Brenda, stifling her impulse to reply, "You did," reached over Jumbo's shoulder and pressed a key on his keyboard. "I know just what you need," she said. "Look at this."
<HR>
<OBJECT CLASSID = "clsid:8AD9C840-044E-11D1-B3E9-00805F499D93" HEIGHT=150 WIDTH=200>
<PARAM NAME = CODE VALUE = keypad1.class>
<PARAM NAME = TYPE VALUE = "application/x-java-applet;version=1.2;>
</OBJECT>
</BODY>
</HTML>

Applet works in MS JVM but not in JDK1.4 !

Running IE 6 SP1 with windows 2000. Everything works well until
I installed JDK 1.4 recently.
I have an ancient (JDK 1.1?) applet that refuses to work with JDK 1.4
But when i disable JDK 1.4 under internet options , it works!
This is the error
"java.lang.NoClassDefFoundError; Symantec/tools/awt/multiList"
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Also note, that Symantec.jar is on the local machine and not on the server. Symantec.jar is a selected compilation of Visual Cafe classes
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It will be better to have Symantec.jar on the server at the same level with your caller applet package. For example
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|
+ --- yor applet package
|
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it shows a FilePersmission while reading the .jar file itself.
the jar is on the local hard disk and is being access via a local html file. (no webserver at all in the moment)
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Try it with a webserver and see if it works. I am having a problem getting an applet to work locally under certain versions of the plugin.

JavaMail applet working on local machine - but NOT on my webpage

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Is your applet signed properly? Note that you have to sign all the jars for the applet -- including the JavaMail jar and the activation jar -- using the same signer.

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