Applet not running in browser?

Hi
What is the reason why an applet will be running in appletviewer but not in a browser???

Hi,
Try out with this html file:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN">
<html>
<head>
<title>Example</title>
<script language="JavaScript">
function MyToolBar()
window.open("Login.html","LoginPage","toolbar=0,menubar=0,scrollbar=0,resizable=0,directories=0,width='110%',height='150%'");
</script>
</head>
<body>
<blockquote>


<SCRIPT LANGUAGE="JavaScript"></SCRIPT>
<COMMENT><SCRIPT LANGUAGE="JavaScript1.1"></SCRIPT></COMMENT>
<SCRIPT LANGUAGE="JavaScript"></SCRIPT>
<APPLET CODE = "MyApplet.class" WIDTH = "110%" HEIGHT = "150%" ></XMP>
<PARAM NAME = CODE VALUE = "MyApplet.class" >
</APPLET>
</NOEMBED></EMBED></OBJECT></Center>

</body>
</html>
Hope this will help you.
Anil
Developer Technical Support
Sun Microsystems Inc,
http://www.sun.com/developers/support

Similar Messages

Applet not viewable in browser

Hi
applet not viewable in browser any website that uses java code seems not to run on my browser though it runs normally well on my friends computer. The browser shows a screen area in grey colour with an error message like "Exception: java.lang.ClassNotFoundException:GUIDemo.class" (im using Win NT4 and IE 5.5) checked the tools/internet options/advanced seettings the browser support is enabled. tried installing the newer version of JRE still not working ..Please guide about any settings that need to be modified or how can i fix this problem ..
Regards
anant
[email protected]

Hi
Just a thought, but what broswer are you and your friend using? Are they different by any chance?
There is an inconsistency between browsers and java, and unfortunately it can result in the error you saw.
Basically, bog standard Internet Explorer uses its own JVM, whereas Netscape, Mozilla, Opera etc tend to use the java plug-in. To make matters worse, if you install the plug-in on a machine that has Internet Explorer installed, it over-rules the Microsoft version to make itself the default (but this can be undone by looking in the Options menu for Java-plugin and un-ticking the box). Give that a try first.
Another cause that I have encountered was when using NT on a network, which had been configured not to accept Java Applets at all! Are you on such a network, or stand alone?
Hope that helps.

Applet can not run in browser, but it wroks in appetviewer. Why?

I wrote a very simple applet, and it works well when I use appletviewer. But when I use browser to open the html file which contains the applet, it always gives no class found error. My browsers are IE5.0 and Netscape4.77. Hwo can I make the applet run in browser?
Quick response is greatly appreciated.

see you have to put the proper code base in your html file.check if your browser is java enabled or not.Java plugin comes with IE 5 and it automatically get installed if you won't disagree with that.Check in optin menu of ur browser that java is enabled or not.
Applet works fine with all browser.
2nd thing when you r running applet through appletviewer,it runs as an application from your local JVM while running through browser means you are running applet through browser 's JVM.

Applet was not running in Browser

I have wriiten one applet (using JMF for playing a song)program and it was run in appletviewer it's work perfectly.After that i was open this prog in browser it doen't work ,it gives following error :
java.lang.NoClassDefFoundError: javax/media/ControllerListener
     at java.lang.ClassLoader.defineClass1(Native Method)
     at java.lang.ClassLoader.defineClass(Unknown Source)
     at java.security.SecureClassLoader.defineClass(Unknown Source)
     at sun.applet.AppletClassLoader.findClass(Unknown Source)
     at java.lang.ClassLoader.loadClass(Unknown Source)
     at sun.applet.AppletClassLoader.loadClass(Unknown Source)
     at java.lang.ClassLoader.loadClass(Unknown Source)
     at sun.applet.AppletClassLoader.loadCode(Unknown Source)
     at sun.applet.AppletPanel.createApplet(Unknown Source)
     at sun.plugin.AppletViewer.createApplet(Unknown Source)
     at sun.applet.AppletPanel.runLoader(Unknown Source)
     at sun.applet.AppletPanel.run(Unknown Source)
     at java.lang.Thread.run(Unknown Source)
java.lang.NoClassDefFoundError: javax/media/ControllerListener
     at java.lang.ClassLoader.defineClass1(Native Method)
     at java.lang.ClassLoader.defineClass(Unknown Source)
     at java.security.SecureClassLoader.defineClass(Unknown Source)
     at sun.applet.AppletClassLoader.findClass(Unknown Source)
     at java.lang.ClassLoader.loadClass(Unknown Source)
     at sun.applet.AppletClassLoader.loadClass(Unknown Source)
     at java.lang.ClassLoader.loadClass(Unknown Source)
     at sun.applet.AppletClassLoader.loadCode(Unknown Source)
     at sun.applet.AppletPanel.createApplet(Unknown Source)
     at sun.plugin.AppletViewer.createApplet(Unknown Source)
     at sun.applet.AppletPanel.runLoader(Unknown Source)
     at sun.applet.AppletPanel.run(Unknown Source)
     at java.lang.Thread.run(Unknown Source)Any one help me,becaz past 4 days i have getting this error ,so i cann't move further any steps on my module ,so any one help me.
Advance Thankx & Regards
K.suresh

Hai Manu
I am using u r code,and change my applet tag like
<APPLET CODE="SimplePlayerApplet.class" WIDTH = "300" HEIGHT = "300" ></XMP>
<PARAM NAME ="FILE" VALUE = "artist - Track 01.mp3" >
</APPLET>Now i am getting error as:
APPLET tag missing CODE parameter.
java.lang.NullPointerException: name
     at sun.applet.AppletClassLoader.getResourceAsStream(Unknown Source)
     at sun.applet.AppletPanel$6.run(Unknown Source)
     at java.security.AccessController.doPrivileged(Native Method)
     at sun.applet.AppletPanel.createApplet(Unknown Source)
     at sun.plugin.AppletViewer.createApplet(Unknown Source)
     at sun.applet.AppletPanel.runLoader(Unknown Source)
     at sun.applet.AppletPanel.run(Unknown Source)
     at java.lang.Thread.run(Unknown Source)
the applet program below there
import java.applet.Applet;
import java.awt.*;
import java.io.IOException;
import java.io.PrintStream;
import java.net.MalformedURLException;
import java.net.URL;
import javax.media.*;
public class SimplePlayerApplet extends Applet
    implements ControllerListener
    public SimplePlayerApplet()
        player = null;
        visualComponent = null;
        controlComponent = null;
        progressBar = null;
        firstTime = true;
        CachingSize = 0L;
        panel = null;
        controlPanelHeight = 0;
        videoWidth = 0;
        videoHeight = 0;
        System.out.println("Hai");
public void init()
        setLayout(null);
        setBackground(Color.white);
        panel = new Panel();
        panel.setLayout(null);
        add(panel);
        panel.setBounds(0, 0, 320, 240);
        String s = null;
        MediaLocator medialocator = null;
        Object obj = null;
        System.out.println("IT's from Init");
        System.out.println("S value is:" + s);
        if ((s = getParameter("FILE")) == null)
             System.out.println("S value is:NULL");
            Fatal("Invalid media file parameter");
        try
            URL url = new URL(getDocumentBase(), s);
            System.out.println("URL Value is:" + url);
            s = url.toExternalForm();
        catch(MalformedURLException malformedurlexception) { }
        try
            if((medialocator = new MediaLocator("file:" + s)) == null)
                Fatal("Can't build URL for " + s);
                System.out.println("catch in malformed");
            try
                player = Manager.createPlayer(medialocator);
                System.out.println("it is from create player");
            catch(NoPlayerException noplayerexception)
                System.out.println(noplayerexception);
                Fatal("Could not create player for " + medialocator);
            player.addControllerListener(this);
            System.out.println("player add control");
        catch(MalformedURLException malformedurlexception1)
            Fatal("Invalid media file URL!");
        catch(IOException ioexception)
            Fatal("IO exception creating player for " + medialocator);
    public void start()
        if(player != null)
            player.start();
            System.out.println("This from start");
    public void stop()
        if(player != null)
               System.out.println("This from stop");
            player.stop();
            player.deallocate();
    public void destroy()
        player.close();
        System.out.println("This from Destory");
    public synchronized void controllerUpdate(ControllerEvent controllerevent)
          System.out.println("This from cotrollerUpdate");
        if(player == null)
            return;
        if(controllerevent instanceof RealizeCompleteEvent)
            if(progressBar != null)
                panel.remove(progressBar);
                progressBar = null;
            int i = 320;
            int j = 0;
            if(controlComponent == null && (controlComponent = player.getControlPanelComponent()) != null)
                controlPanelHeight = controlComponent.getPreferredSize().height;
                panel.add(controlComponent);
                j += controlPanelHeight;
            if(visualComponent == null && (visualComponent = player.getVisualComponent()) != null)
                panel.add(visualComponent);
                Dimension dimension = visualComponent.getPreferredSize();
                videoWidth = dimension.width;
                videoHeight = dimension.height;
                i = videoWidth;
                j += videoHeight;
                visualComponent.setBounds(0, 0, videoWidth, videoHeight);
            panel.setBounds(0, 0, i, j);
            if(controlComponent != null)
                controlComponent.setBounds(0, videoHeight, i, controlPanelHeight);
                controlComponent.invalidate();
        } else
        if(controllerevent instanceof CachingControlEvent)
            if(player.getState() > 200)
                return;
            CachingControlEvent cachingcontrolevent = (CachingControlEvent)controllerevent;
            CachingControl cachingcontrol = cachingcontrolevent.getCachingControl();
            if(progressBar == null && (progressBar = cachingcontrol.getControlComponent()) != null)
                panel.add(progressBar);
                panel.setSize(progressBar.getPreferredSize());
                validate();
        } else
        if(controllerevent instanceof EndOfMediaEvent)
            player.setMediaTime(new Time(0L));
            player.start();
        } else
        if(controllerevent instanceof ControllerErrorEvent)
            player = null;
            Fatal(((ControllerErrorEvent)controllerevent).getMessage());
        } else
        if(controllerevent instanceof ControllerClosedEvent)
            panel.removeAll();
    void Fatal(String s)
        System.err.println("FATAL ERROR: " + s);
        throw new Error(s);
    Player player;
    Component visualComponent;
    Component controlComponent;
    Component progressBar;
    boolean firstTime;
    long CachingSize;
    Panel panel;
    int controlPanelHeight;
    int videoWidth;
    int videoHeight;
}

Applet does not run in Browser

Iam using Windows XP and IE 6.0. Applets do not run in my browser. Hovering the cursor where the applet should be in the browser, I get a Class not found message. Setting the CLASSPATH variable did not help. Any suggestions?

You might find an answer in this new page
[url http://java.sun.com/j2se/1.4.2/docs/guide/deployment/deployment-guide/upgrade-guide/index.html]Java Upgrade Guide: Migrating From the Microsoft JVM to the Sun JRE

Applet not runing in Browser,although it runs in appletviewer.

Hello! I have created an applet which connects to an Oracle Database executes some queries and after some processing on the data selected it returns the results. When i run the applet using appletviewer everything works fine.(appletviewer -J-Djava.security.policy=C:\folder\mypolicy.java.policy C:\folder\applet2.html is the command i used).
The code of the HTML file i used is:
<html>
<head>
</head>
<body>
<applet code=applet2 archive=applet2.jar width=600 height=600>
</applet>
</body>
</html>
However when i run the html page(Mozilla Firefox) i get a white page with a frame where Java starts to load and then nothing happens. The frame remains white and i don't see the results that i see when i use appletviewer. I really don't know what is wrong and i would appreciate any answers cause i am new to this.
Thanx in advance...
Edited by: lefos987 on May 26, 2009 2:03 PM

lefos987 wrote:
appletviewer -J-Djava.security.policy=C:\folder\mypolicy.java.policy C:\folder\applet2.htmlWhen you run it via a browser, how do you propose to get the browser to acknowledge the custom security policy? You can't pass command line arguments to it.
However when i run the html page(Mozilla Firefox) i get a white page with a frame where Java starts to load and then nothing happens.It likely threw an exception, which you can get the detail of via the browser if you look for something like "Show Java Console".
Another note: The applet viewer runs in a different security model than browsers do, so if your applet is trying to access resources on the client machine, the browser isn't going to let that happen. In this case, probably it shouldn't be an applet in the first place.

Applet not running in local browser

I can run any applet from web.
I can run any applet in appletviewer.
But I can not run applets in browser from local html file.
I can not run even the demos that came with de SDK 1.4.1_01.
Can anyone give me some hint?
Maybe is very obvious but I ca not see it.
Thank you very much.
Valeriu Sprintu

the hello.java file is:
import java.applet.Applet;
import java.awt.Graphics;
public class hello extends Applet {
StringBuffer buffer;
     public void init() {
     public void start() {
     public void stop() {
     public void destroy() {
     public void paint(Graphics g) {
          //Draw a Rectangle around the applet's display area.
          g.drawRect(0, 0, size().width - 1, size().height - 1);
          //Draw the current string inside the rectangle.
          g.drawString("Hello", 5, 15);
The hello.html file is:
<html>
<body>
Applet should be there
<br>
<applet code="hello.class" width=200 height=200>
No applet
</applet>
</body>
</html>
hello.html and hello.class are of course in the same folder.
If I modify the .html file acording to OBJECT tag specifications for Java Plug-In the same applet runs OK in the browser (IE5.0 ).
I forgot to tell that I have installed the last version of SDK j2sdk1.4.1_01
<html>
<body>
Applet should be there
<br>
<OBJECT classid="clsid:8AD9C840-044E-11D1-B3E9-00805F499D93"
WIDTH = 200 HEIGHT = 200 >
<PARAM NAME = CODE VALUE = "hello.class" >
<PARAM NAME="type" VALUE="application/x-java-applet;version=1.1">
No applet
</OBJECT>
</body>
</html>
I think there is a problem with the JVM from Microsoft
Thank you,
Best regards,
ValeriuS

Why will my applet not run in a browser??

Hi,
I have recently converted a swing application to an applet for use on the web. The applet works perfectly when executed with appletviewer in the Command Prompt. However - when i open the html file - the browser tries to load the class but can't - the status bar at the bottom says "sample.class not found".
My browser is capable of running other applets - and the class file does exist in the same folder.
Can someone help with this??
Thanks
R

If you have swing in your Java code then you need a
java plug-in. To test if you have a Java plug-in
installed go to:
http://home.comcast.net/~millennm/amex.html
Without the plug-in the AWT link works. But you need
the plug-in for the Swing link to work.
The plug-in is at:
http://java.sun.com/j2se/1.3/download.html","Java_Runti
e_Environment
hi, excuse me...
How can I write a plug-in needless Applet?
After I browse the sample of the above article, I think that it seems if my Applet didn't use swing , it will not need to download a Java plug-in when it execute in a browser. But my Applet still need to download a plug-in, why?
Here is my sample code:
/* sample code start */
import java.awt.*;
import java.applet.*;
public class test1 extends Applet
public void paint(Graphics g)
g.drawString("I'm Here!",160,80);
/* sample code end */
And here is my html code:

<applet code=test1.class width=320 height=100>
</applet>

thank you very much.

Applet not running in the broweser.

Hello everyone I have a problem that is bugging me.
in my pc at home i have operating system window xp i have oracle9i installed and also java and j2ee and version of internet explorer is 6.0
.there is no proble running html pages but the problem is the applet are not running in the broweser even the java demo from sun is not running
.when i try to run the applet a dialog box appears and shows this
" jvm not find Download now" i do not have internet connection.
and one more thing i want to down load or save file in webserver
i donot know whether my pc is having default webserver but when i type this "http://localhost" a page of oracle is display listing jserver ,appache server and so many thing.
do i have a webserver that can be used by me for java program(adv java) or i have to get one .as i told you there is java1.3 and j2ee1_2_3
something like this i donot remember is there no default webserver along with them .how can i use them for my java programe .
let me remind you the applet not getting downloaded in the browser is a bigger problem for me.
i appreciate your concern please help me out
have a nice day bye.

1} The applet is not getting loaded in my internet
browser.Error messages? Are you sure your setup is correct? Search. "Applet not working" usually has only a small range of reasons, all well-covered here.
2}why the oracle page is displayed when i type
"http://localhost".
Maybe because you have some Oracle webserver?
3} Do i have any default webbrowser in my system.Yes. The one that opens when you double-click on an HTML page.
>
thanks.

My Applet not running in java not installed systems.

dear sir/madam,
i have an applet which uses java.awt.* and java.awt.event.* classes, is running in systems with J2SE installed. but it is not running in systems with java enabled browsers without J2SE installation.
i want my applet to be run in all java enabled browsers without J2SE also.
how to make my applet work.
thanks in advance.
-- ks_moses

install J2SE to develop Java programs..
install JRE to run your Java Programs
To run your applets into such a browser, you must have a plugin installed on that browser to run your applet, so install JRE(Java Runtime Environment), it will install the Java plugin automatically so you can run your applets, GoodLuck
Regards,
Mohammed Saleem

Applet Not Running in IE. Need IE settings for running applet.

Hi
I am facing a problem with Applet while running in IE-6. The problem is very simple; Applet is not running in IE-6, not even a simple applet which displays just a Label.
I am using Java Version 1.4
Settings for IE is as follows
Java (Sun)
CHECKED Use Java 2 v1.4.0 for <applet>
Microsoft VM
CHECKED Java console enabled
NOT CHECKED Java logging enabled
CHECKED JIT compiler for virtual machine enabled
The applet is running in Appletviewer and run in IE in some other machine. The problem is in my browser and Java versions.
If I start the applet in IE it is not showing even Jave Console (which is enabled).
In Java Plugin (Control Panel) I enabled Show Console and set MSIE checked.
What should I do to solve such a stupid problem with my IE. I have updated my JVM and IE twice but yet to wait for solution.
Your help is worshipfully appericated.
with love Vijay

I got some reasonable solution from some other forum.
The Problem is with the VM. The JVM is crashed with MS VM.
That is why the browser diplays class not found error.
This is because the MS VM is not allowing the JVM to look for .class files.
This will happen for java 1.4.x .
If you use HTML converter (converting the applet to object) it will work.
But the Optimal solution is compile your applet file with -target option.
e-g
javac target 1.1 HelloWorld.java
It is the most efficient way to avoid such problems with IE while running the applets.
I Thank you all for your solutions.
with love Vija

Applet not running on MAC OS X

My applet works fine on windows but when my client run my applets on MAC OS Browser then it gives error on status bar like "Applet Not Loaded ".
So How can i solve this problem . helpful advice is appreciated.

The first advice given was the best advice you will get at this stage.
OTOH, the problem might be that the compilation options used on Windows were for a 1.6+ JRE, whereas the Mac is running a 1.5 JRE.
If that is the case, the relevant questions become..
How do you compile the applet (e.g. IDE, IDE with Ant build script, command line..)?
What SDK version are you using?
What compilation options are used (the important ones here are -source -target and -bootclasspath )?
What [java version|http://pscode.org/prop/?prop=java.version] is the Mac using?
Also note that many things* can be determined if you provide an URL to the applet.
* Especially if someone has a Mac and can report the error.

Applet - not rendering n Browser - Mozilla / IE - Help

Hi,
I have following code in AnotherHello.html in
<html>
<body>
<applet code="AnotherHello.class" width="300" height="150"></applet>
</body>
</html>and the following in AnotherHello.java
import java.awt.*;
import java.applet.Applet;
class AnotherHello extends Applet
     public void paint(Graphics gr)
          setBackground(Color.lightGray);
          gr.drawString("Hello", (300/2 - 40/2), (150/2 + 40/2));
}When I run it using Mozilla or IE it only shows the HTML code in the browser, it does not get me the applet on to the screen. Could somebody help me in figuring out the problem.
Thanks in advance.

I have only these two browsers so dont know about
other browsers.
No it does not run in applet viewer also.
I have the class file compiled in the same directory
as in the java and the html file.
I am able to see applets from various websites in my
mozilla browser, which would mean that applet is
enabled.
I am not sure what could be the problem.
Please do let me know.Sounds like it should run then. Maybe it is, but what it's drawing is "invisible" - what about removing that setBackground call, or set it to a different color. If you get a different result, then it is running.

Web links in .pdfs inoperable- "Acrob. could not run the browser"

I keep my Adobe Reader updated often, but I've been experiencing a severe inconsistency with the ability to open a (FFox) web page by clicking a link given by the author of any given .pdf., embedded in it. Sometimes it works and opens up the new FFox page OK. But maybe a little more than half the time I first get a security warning, "The document is trying to connect to (URL). If you trust this site, choose 'Allow'. If you do not trust this site, choose 'Block' ". So, I'll click 'allow' and then I get a window saying, "Acrobat could not run the web browser. Unknown error (740).
I've tried to find out more about an error 740, but there's no relation online between any error w/ that # and Adobe. It reads kind of contradictory anyway, since it says "unknown error" but then gives you an error #. Ideas, anyone? Thanks.
(Message was edited by: Victorious57)

I'm having the same problem and have found a few suggestions from different places that may help.
1. Add the site / host to the trusted sites list in Internet explorer. E.G http://hostname or file://hostname or hostname.
2. In Adobe reader or Acrobat go to START>PREFERENCES>JAVA SCRIPT Untick 'enable Acrobat JavaScript'.
3. Create the documents from open office and use the export to PDF option.
The last option seemed to work when adding the hostname to the trusted sites list in IE 8 (IE 6 didn't work)
One thing I noticed when I created PDF's this way is the link was displayed as file://hostname/share/doc.pdf.
When I converted a document from MS Word 2007 and used Acrobat standard to convert the document the link was displayed as file://///host/share.doc.pdf.
I'm not sure why the extra //// were added but it seems that MS word puts the hyperlink in this format.
As I said creating the document in Open Office worked when I added the host in IE 8's trusted site list but this isn't acceptable for me due our SOE restrictions.
Our setup is as follows..
XP Pro SP2
Internet Explorer 6
Adobe Acrobat Standard 9.3

Flex apps will not run in Browser after install

I am running IE 6 (Wintel) and have tried both installers for
the most recent Flash player -- activeX and the other standalone
one. I cannot view any Flex apps now in my browser - most notably
the derby examples. It seems to hang on a screen that has the title
"Flash Player Installation" -- like something in the apps is
sniffing for the player, not finding it, and then hanging on some
"automatic" install hook that has been built for Flex but not
completely implemented yet. That is my suspicion, but I just want
it to work -- do I need to uninstall/reboot/install again ? Any
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You definatately need to run the unistaller 1st. Also make
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Applet not running in browser?

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