Running a Java Applet on Mac OS browser

I'm having trouble getting my Java Applet to work properly on the Mac OS version of IE5. Basicaly, the app fails to appear. Are there any do's and don'ts regarding the running of Java Applets on Mac Browsers?
I read somewhere that you can't send parameters through to the Applet. Is that true? I'm not trying to do this and it's still doesn't work.
Any help would be appreciated.

If anyone can help me with this problem I would be greatful.

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Running a java applet from flash

Hi,
How do you run a java applet from within a Flash movie?
Is it necessary for the user to download a java interpreter, or is there an interpreter somehow built into their browser that can run applets?

I was wondering , I don't know too much about Flash
I remember seeing some classes in amongst the Flash
files when it installed , but couldn't tell you whart they
do (at the moment , but you've got me interested)
maybe you should rethink your strategy for building your page (and your movie) maybe build the movie around
your applet , or preload it then replace a an area of your movie area with your applet (the way you handle rollovers).
the advantage is you can make calls to applet methods
from Flash as it supports Javascript.
jus remember to set the scriptable <PARAM> to true
Users shouldn't have to download the plug-in or JRE
you should specify it in the OBJECT or EMBED tag so
if they don't have it , the browser will tell them.
of course this is going to change as Microsoft are stopping support for JAVA , users will then have to download the plug-in from Sun in order to view or use JAVA on the internet.

Is it possible to run a java application within a web browser?

Hello everyone here! I have a question about running a java application within a web browser and I would appreciate it very much if anyone here can give me some answers.
I have a standalone java application written with AWT. Basically this free application lets users to select spectral lines from a big file based on some criteria and plot those selected lines. Yes, it is a very simple application. Now I want to run this application within a web browser so that users don't need to download the application from the ftp site and thus don't need to install in their machine. Is it possible to run this application within browser? If yes, can we get the same plotting function as we run the application separately and where should I start out?
Thanks in advance!
kuilian

Please see the signed applet discussion group for details of how to avoid the applet security restrictions. You can sign the applet, or use the policy file containing {AllPermission} for testing purposes (though not suitable for widespread deployment).
Regards
Matthew

Problems running any Java applets

I have tried uninstalling, and re-installing the latest version of Java...
any time I try and run an applet I get this error...
The publisher cannot be verified by a trusted source. Code will be treated as unsigned.
Name: loader
Java.io.EOFException
at java.io.DataInputStream.readInt(Unknown Source)
at sun.security.provider.JavaKeyStore.engineLoad(Unknown Source)
at sun.security.provider.JavaKeyStore$JKS.engineLoad(Unknown Source)
at java.security.KeyStore.load(Unknown Source)
at com.sun.deploy.security.DeploySigningCertStore$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.deploy.security.DeploySigningCertStore.loadCertStore(Unknown Source)
at com.sun.deploy.security.DeploySigningCertStore.load(Unknown Source)
at com.sun.deploy.security.DeploySigningCertStore.load(Unknown Source)
at com.sun.deploy.security.ImmutableCertStore.load(Unknown Source)
at com.sun.deploy.security.TrustDecider.isAllPermissionGranted(Unknown Source)
at com.sun.deploy.security.TrustDecider.isAllPermissionGranted(Unknown Source)
at sun.plugin.security.PluginClassLoader.getPermissions(Unknown Source)
at java.security.SecureClassLoader.getProtectionDomain(Unknown Source)
at java.security.SecureClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.access$000(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at sun.applet.AppletClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.applet.AppletClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.applet.AppletClassLoader.loadCode(Unknown Source)
at sun.applet.AppletPanel.createApplet(Unknown Source)
at sun.plugin.AppletViewer.createApplet(Unknown Source)
at sun.applet.AppletPanel.runLoader(Unknown Source)
at sun.applet.AppletPanel.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
I tried looking at the java control pannel, and when I clicked on security, then certificates and I got this error
General Exception
java.io.EOFException
at java.io.DataInputStream.readInt(Unknown Source)
at sun.security.provider.JavaKeyStore.engineLoad(Unknown Source)
at sun.security.provider.JavaKeyStore$JKS.engineLoad(Unknown Source)
at java.security.KeyStore.load(Unknown Source)
at com.sun.deploy.security.DeploySigningCertStore$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.deploy.security.DeploySigningCertStore.loadCertStore(Unknown Source)
at com.sun.deploy.security.DeploySigningCertStore.load(Unknown Source)
at com.sun.deploy.security.DeploySigningCertStore.load(Unknown Source)
at com.sun.deploy.panel.CertificatesInfo.reset(Unknown Source)
at com.sun.deploy.panel.CertificatesInfo.<init>(Unknown Source)
at com.sun.deploy.panel.CertificatesDialog.<init>(Unknown Source)
at com.sun.deploy.panel.SecurityPanel.certsBtnActionPerformed(Unknown Source)
at com.sun.deploy.panel.SecurityPanel.access$000(Unknown Source)
at com.sun.deploy.panel.SecurityPanel$1.actionPerformed(Unknown Source)
at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Source)
at java.awt.AWTEventMulticaster.mouseReleased(Unknown Source)
at java.awt.Component.processMouseEvent(Unknown Source)
at javax.swing.JComponent.processMouseEvent(Unknown Source)
at java.awt.Component.processEvent(Unknown Source)
at java.awt.Container.processEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Window.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)
The only way I am able to run a java applet is Unsigned...

I am having this same exact problem and receiving the same error anytime I try to run a java appet within any browser.
I cannot locate a keystore file or any other security certificate files. Also under Control Panel, If I run the Java Control Panel and then select the Security tab/certificates. I see a similar error and do not see any certificates. Any ideas on how to correct this.

Safari will not run a signed applet on mac os x 10.5.7 with new Java update

Hi Everyone,
I've got a problem that hopefully you guys can help me solve. I have an applet that runs on windows, mac and linux that is signed by a verisign certificate my work has. The certificate is valid and everything works just fine on windows and linux, but after I upgraded our macs with the newest java update for mac (which gave macs Java 1.6.13), the applets won't work. When the applet is loaded in Safari or Firefox, it asks if I want to trust the certificate. When I tell it to trust it, Safari comes back with a message saying that it will not trust the code and will treat it as unsigned code.
For a long time the applet was built and signed on windows, but now it can be built and signed on windows and mac. Building and signing on either platform gives the same results and the mac signed applet works just fine on windows.
Has anyone else run across this problem? Any help or advice will be appreciated.
Thanks,
Robbie

BenGlancy wrote:
How did you tell it to fully trust it? I thought the dialog comes up asking the user whether to trust it.
I only ask because it's not practical to expect all users to dig around for settings to trust a particular certificate.They don't have to dig around. When a signed Applet is loaded, if the certificate chain contains a certificate not in the trust store then a dialogue box asks the user if he wants to run it anyway. This dialogue box also has check box to indicate the the user should always trust this certificate and checking this means the user will not be asked again.

Can programs run from java that is on web browser

i have written a program and used autorun to run when a cd is put on but not every body will have java on their computer a firend told me that most people will have java on the web browser that will be able to run the cd is this true or will i have to give download instructions to download jav first. this is obviously not ideal as i want people to be able to run the program by putting the cd in and nothing else.

1. You can create a Java applet, which is a Java program that runs
from a web page. It will need to be a signed applet. Your autorun will start the browser with the web page carrying the Java applet.
I don't think this is optimal.
2. Search for "embed JRE", which describes how you can supply your
private JRE with your program. It does not install the JRE, nor does it
care if one is already installed. I did this many times, there is no problem
at all, but here I have no idea whatsoever what happens if your JRE originates from write protected media. I guess it should work. Experiment or wait for others to see what they think.

How to run a Java applet on a website.

Hi,
I am trying to run the code below [DrawLines.java|http://www.dgp.toronto.edu/~mjmcguff/learn/java/01-drawingLines/]
import java.applet.*;
import java.awt.*;
public class DrawingLines extends Applet {
   int width, height;
   public void init() {
      width = getSize().width;
      height = getSize().height;
      setBackground( Color.black );
   public void paint( Graphics g ) {
      g.setColor( Color.green );
      for ( int i = 0; i < 10; ++i ) {
         g.drawLine( width, height, i * width / 10, 0 );
on my website . I compiled it using JDK1.6.0_21 on Windows 7 and generated DrawingLines.class (My site is hosted on a linux server, is this an issue since it was compiled on Windows?)
I created a html file:
<applet width=300 height=300 code="/shanegibney/classes/DrawingLines.class"> </applet>Then I created a new folder called 'classes' in my public directory.
I get the following error:
java.lang.NoClassDefFoundError: /shanegibney/classes/DrawingLines (wrong name: DrawingLines)
     at java.lang.ClassLoader.defineClass1(Native Method)
     at java.lang.ClassLoader.defineClassCond(Unknown Source)
     at java.lang.ClassLoader.defineClass(Unknown Source)
     at java.security.SecureClassLoader.defineClass(Unknown Source)
     at sun.plugin2.applet.Applet2ClassLoader.findClass(Unknown Source)
     at sun.plugin2.applet.Plugin2ClassLoader.loadClass0(Unknown Source)
     at sun.plugin2.applet.Plugin2ClassLoader.loadClass(Unknown Source)
     at sun.plugin2.applet.Plugin2ClassLoader.loadClass(Unknown Source)
     at java.lang.ClassLoader.loadClass(Unknown Source)
     at sun.plugin2.applet.Plugin2ClassLoader.loadCode(Unknown Source)
     at sun.plugin2.applet.Plugin2Manager.createApplet(Unknown Source)
     at sun.plugin2.applet.Plugin2Manager$AppletExecutionRunnable.run(Unknown Source)
     at java.lang.Thread.run(Unknown Source)
Exception: java.lang.NoClassDefFoundError: /shanegibney/classes/DrawingLines (wrong name: DrawingLines)I'm sure adding a java applet is very common. Does anyone have any ideas why this isn't working? It can be seen here .
Any help would be greatly appreciated,
Thanks,
Shane
Edited by: ofey on Jul 9, 2010 4:21 PM

I believe it's interpreting some of the code attribute as a path. Try this:
<applet width=300 height=300 codebase="/shanegibney/classes/" code="DrawingLines"> </applet>

Problem Running a java applet from an HTML page

I can run my applet at the command prompt with:
appletviewer coffee.html
But when I try and open the Coffee.html by opening
the page in Internet Explorer I get the following message:
Can't find Database driver class: java.lang.ClassNotFoundException: sun.jdbc.odbc.JdbcOdbcDriver
Code: createcoffees.java
import java.applet.*;
import java.sql.*;
public class CreateCoffees extends Applet{
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          try {Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
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               System.err.println(e.getMessage());
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               stmt.close();
               con.close();
          } catch(SQLException ex) {
               System.err.println("SQLException: " + ex.getMessage());
}

Is your jdbc-odbc driver properly loaded? Its very clear that its a class not found exception which is thrown by this:
try {Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
} catch(java.lang.ClassNotFoundException e) {
System.err.print("ClassNotFoundException: ");
System.err.println(e.getMessage());

How to put my java applet application inside a browser

currently I have a java applet appilcation but it pops-out outside the browser. does anyone can show me how to embed it on my browser

make an html file like this inside the same folder as your .class files
<html>
<body>
<p align = center><applet code ="Main.class" width=500 height=300>
</applet></p>
</body>
</html>width and height have to be within the resolution of your screen

Can't get Safari 5.1.1 to run a java applet from Ubuntu Server with unsigned cert

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thx!!!

here's the fix:http://artur.ejsmont.org/blog/content/how-to-import-self-signed-ssl-certificate- to-java-keystore-adding-https-certificate
Only when I run the command:
iMac:security FCPX$ sudo $JAVA_HOME/bin/keytool -import -file certfile.txt -keystore /Library/Java/Home/lib/security/cacerts
I get this:
Password:
sudo: /bin/keytool: command not found
iMac:security FCPX$
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Is running local Java applets disabled in Safari 6?

Ever since updating to Mountain Lion—and Safari 6—locally stored Java applets don't work any more. A quick test in JavaScript:
navigator.javaEnabled();
returns FALSE if the page is on the file server, and TRUE if the exact same page comes from a web server. Unfortunately these pages can't be delivered over a web server, they have to run from a file server.
Anyone know how to get applets to run locally in Safari? I've opened up Gatekeeper to run all apps and poked around the Java settings to no luck. I don't even get a "Inactive Plug-in" message, just...nothing. Am running both the Apple JRE6 as well as the most recent Oracle version 7u7.
Cheers

Java is locked down SO tightly now. I had local Java applets that ran fine in Firefox but wouldn't run in Safari. My friend did a little troubleshooting with me and figured this out:
1) In Safari > Preferences > Advanced, check "Show Develop menu in menu bar"
2) In Safari > Develop, select "Disable Local File Restriction"
Hope this helps!

Java applet in Mac OS

Hello. There was a problem in applet under Mac OS. The problem is that if I call the dialog from an applet, then close the dialog applet does not receive the focus and have to again click on the applet.
What can I do? Or should we write AppleScript applet to transfer the focus after the dialog is closed

Oracle does not provide JRE for Mac OS X (at this moment).
It may work better if you ask for advice on Apple's Java forum.

Run a java applet whitin a application ?

Is it possible for an application to start a java applet and run it inside the application, say on a Jpanel ?
Regards
Per

Yes. Just remember that it's now you who is responsible for calling init and start.
(there will be some problems if the applet calls methods like getCodeBase and getParameter)

I can't run signed Java Applets

HI
I have a java applet where I need to have acces to a local file, but I can't get IE to run the applet. (IE do not come with the Secutiy Warning window.)
From the homepage, I run the applet via:
<applet name=read_file code="read_file.class" width="0" height="0">
<script language="JavaScript">
document.read_file.file_read();
</script>
And the java code is:
import java.applet.*;
import java.awt.*;
import java.io.*;
public class read_file extends Applet{
     public char[][] ip;
     public int counter;
     public String te="dette er en java test";
public void init() {
public void file_read() {
     String str;
     counter =0;
     try {
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          in.close();
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public void test() {
I have signed the cab file with:
"C:\Program Files\Microsoft.NET\SDK\v1.1\Bin\signcode.exe" -j "C:\Program Files\Microsoft.NET\SDK\v1.1\Bin\JAVASIGN.DLL" -jp High -v hjl.pvk -spc hjl.spc -n "oil" -i "www.vedikke endnu-.dk" "C:\Documents and Settings\rbn\Desktop\UIp\hjemmeside\read_file.cab"
and maket the cab fil with:
"C:\Documents and Settings\rbn\Desktop\UIp\cab\BIN\MAKECAB.EXE" "C:\Documents and Settings\rbn\Desktop\UIp\java\read_file.class" "C:\Documents and Settings\rbn\Desktop\UIp\hjemmeside\read_file.cab"
What do I need to different ?

I see no reason why you want to make this applet for the msjvm, here is how you do it with the sun sdk:
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
(my copy and paste fingers are really getting tired now, copyd and pasted this
for about a 100 times now)
Notice some differences in the html code of the examples (they don't use the applet tag)
If you're aiming for the msjvm because you don't want any support form MS in
the near future and want to delever a legacy unsupported unmaintainable applet
than I have to ask you how you compiled the applet. If you used the SUN sdk
then are you aware that the msjvm cannot handle java version higher than 1.1?
So you have to compile it like this: javac -source 1.3 -target 1.1 ....
Your html file seems to be missng the cabbase value so how do you expect
IE to find the cab file?

Firefox 5.0 consistently crashes when trying to run a java applet

Trying to run a program with JAVA webstart, Firefox crashes. Java version is correct (as verified by Java test).
repeatable every time.
Sometimes does not generate a crash report (50% of time).

Try logging in to a different user account on the same computer. Does Safari have the same problem?

Running a Java Applet on Mac OS browser

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