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.

Similar Messages

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{
     public void init() {
          Statement stmt;
          Connection con;
          try {Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
          } catch(java.lang.ClassNotFoundException e) {
               System.err.print("ClassNotFoundException: ");
               System.err.println(e.getMessage());
          try {con = DriverManager.getConnection("jdbc:odbc:hq","afm", "afm");
               stmt = con.createStatement();
                      stmt.executeQuery("SELECT * FROM RM");
               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());

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.

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.

How to run any java file...

i want to run .java file..
suppose i have some classes then i want to run those classes by providing just the name of the class..
my program should run any .class file by just selecting the name of the class..

rajeev-usendi wrote:
it can be any .class file..
it can have a main method() or init()...
basically i want to execute that .class file and dynamically i want to access its variables which has been defined public..Why don't you just "execute" these class files within the program itself and keep the class files within the same project/jar file? Call the methods dynamically to access it's variables.
I think could run any .java file by implementing it as Runnable and starting them as threads from the main program. I'm not sure how you'd get it to the poitn where you could .start() it though.

I am running 10.5.8, and just updated my java to java 5 update10. Now my firefox is missing the Java plugin, and I can't load any Java applet at all. When I try it with Safari, it hangs when certain Java applet loads. HELP!!!

Suddenly my Java plugin is missing and i can't load any Java with Firefox at all, even though i have it enabled in the browser! i've tried loading in java embedding plugin, but it doesn't work. what should i do???

It's not in Tools> Add-ons >plugins? Should be Java Plug-in 2 for NPAPI browsers 13.5.0. What are you seeing there? I don't think it's called the embedding plugin any longer.
Might try getting the Firefox 5 standalone application. Trash the current one and replace it. Doing this won't affect your Profile or any settings.
http://www.mozilla.com/en-US/firefox/all.html
If it's enabled, how can it be missing?
If this doesn't work, ask here. No need to register. Make sure you put (Mac) in the title.
http://forums.mozillazine.org/viewforum.php?f=38
Message was edited by: WZZZ
EDIT. Oops, may be different for 10.5.8. Was thinking recent Java update for 10.6. But try installing a new app anyway. In the past, this got me the latest Java plugin.

I could not run any java application

I could not run any application program( even thouht the simplest one such as helloword). It would give NoClassDefoundError as:
Exception in thread "main" java.lang.NoClassDefFoundError: Welcome1
Press any key to continue . . .
I use text pad editor. First I compile it, there is no error. But when I try to run ( by click run java application program button ) it gives me the same error message.
I also always have compile error such as no class define when I try compile the program which need to import user defined class from differerent package. ( even though I did put all the classed in the same directory and also use import statement)
I did try to run many other applet programs which do not use any user defined class, in this case every thing work fine and I could run the program.
That mean I could run simple applet program but not application, also i always have compile error when ever I tried to import user defined class.
I'm afriad there is some thing wrong with the sdk and java enviroment, therefore I did try to uninstall the program and redownload from the web( I try both version 1.3 and 1.4 many time, and I did check the size of the application when I finish down load) but I still got the same problem.
My computer operating system is WinMe.
I appreciate any help

You probably have to set some settings for text pad. It looks like the java interpreter could not find your class, which most likely means that the classpath setting is not set properly.

Problems running standalone java

I have been writing java applets for a while in editplus then compiling them with javac in editplus and viewing them with appletviewer through editplus. I have been given a java standalone program. It compiles fine with no error messages but when i try to run it with java i get the following error message:
java.lang.NoClassDefFoundError: Server1
Exception in thread "main"
Output completed (2 sec consumed) - Normal Termination
And the program doesn't run. Can anyone see why this is?
Any help will be greatly appreciated!

okay how would i go about correcting this problem?
Heres the code by the way:
import java.net.*;
import java.io.*;
public class Server1 {
public static void main(String [] args) {
ServerSocket s;
Socket clientsSocket;
try {
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          clientsSocket = s.accept();
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          System.out.println(clientsSocket.getInetAddress());
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          int lengthReceived = in.read(receiveBuffer);
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Java Control Panel wont open at all and any Java Applets crash web browsers

Hello,
I recently installed a fresh fully updated copy of Windows 7 Home Premium 64 bit, and I have not for the life of me been able to get Java working at all. Java version is the latest JRE 6U31. I only have Internet Explorer 9 installed but I doubt it is a browser issue since I cannot even open the Java control panel. I have tried using the 32 bit version of Java, and the 64 bit. Anytime I try to open the Java control panel with either 32 bit or 64 bit, I get an error message (click link below to view error message):
http://i65.photobucket.com/albums/h204/gobigjeff/Java%20Error/javaerror.png
I can only bring up the Java Control Panel using the command “javaws –viewer” . Anytime I try to load a web page with a Java applet in either 64 bit or 32 bit, it freezes and crashes. I am running Internet Explorer 9 and have tried both the 32 bit and 64 bit browser versions. I saw Java’s recommendation to only use the 32 bit version so I have mainly been trying to get the 32 bit version working 1st, with no success. I have tried ALL of the following steps, and have done some exhaustive research on this problem. It seems others have had this issue as well, with no solution to be found:
•     Uninstalled and reinstalled only Java 32 bit JRE 6u31 multiple times (Used Javara and reg cleaner to remove all old Java traces)
•     Uninstalled and reinstalled only Java 64 bit JRE 6u31 (Used Javara and reg cleaner to remove all old Java traces)
•     Uninstalled and reinstalled bit JRE 7 (Used Javara and reg cleaner to remove all old Java traces)
•     Used SFC /scannow in safe mode to verify Windows files
•     Ran spyware and virus scan with no issues detected
•     Added all java processes to windows firewall
I am out of solutions here. If anyone has had this problem with Java or knows what I need to do to fix the problem your advice would be greatly appreciated. I don’t think reinstalling windows is the solution because this is a fresh install.
Edited by: 918650 on Mar 4, 2012 1:16 PM

I figured it out. I changed the installation folder to C:/Java and it finally worked!

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>

Problems running a java program

Hello,
I have absolutely no java experience whatsoever, and I need to fix a program that suddenly stopped running properly after several years without problems. Basically, I have a perl script that calls a java program. Everytime I run this perl script from the web browser, the java program returns an internal error:
# # HotSpot Virtual Machine Error, Internal Error # Please report this error at # http://www.blackdown.org/cgi-bin/jdk # # Error ID: 5649525455414C53504143450E4350500024 # # Problematic Thread: prio=5 tid=0x804e680 nid=0x6d16 runnable #
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Thanks!

...fix a program that suddenly stopped running properly after several years without problems.Which means either the program changed or the environment changed. I would guess the environment. The most likely possibilities: new version of the operating system, new version of perl, new version of java. Also possible: new version installed of any of the previous without removing older versions, new software not associated with the first, new mapped drives and/or changed env vars.

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!

Problem Running Hello.java

Hi All,
I am facing problem to run Hello.java.
The following exception accurs when I try to run it.
java.lang.RuntimeException: RegOpenKeyEx: The system cannot find the file specified. (2)
     at com.ibm.speech.recognition.RecoImpl.initialize(Native Method)
     at com.ibm.speech.recognition.RecoImpl.<init>(RecoImpl.java:163)
     at com.ibm.speech.recognition.RecoImpl.make(RecoImpl.java:103)
     at com.ibm.speech.recognition.IBMEngineCentral.makeModes(IBMEngineCentral.java:112)
     at com.ibm.speech.recognition.IBMEngineCentral.createEngineList(IBMEngineCentral.java:179)
     at javax.speech.Central.availableRecognizers(Central.java:455)
     at javax.speech.Central.createRecognizer(Central.java:343)
     at hello.Hello.main(Hello.java:170)
java.lang.NullPointerException
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Can any body tell me what should I do.
Thanks in advance,
Regards,
Haider Ali

The solution is simple, but only once have I seen it up in the forums, so I am on a campaign to put it in a couple more places.
Solution: download the via voice runtime from IBM's Alphaworks website. I don't have the link handy, but it is pretty easy to find. Something like http://alphaworks.ibm.com.
Just make sure you not only get all of the SDKs and such, but also the ACTUAL runtime. They say something about needing the runtime on the download page, but it is in the fine print. It is 'VVRTDUS10.ZIP' and is around 170MB or so. Once installed, if you still have a problem, try putting the 'bin' directory in the via voice folder in your PATH (not CLASSPATH) environment variable.
That did the trick for me.
Bye now.

Having Problems Running my Java Progs

Hey guys,
I keep getting the following error message when I try to run any of my java programs.
Exception in thread "main"
java.lang.NoClassDefFoundError: HelloApp
this is the app that im trying to run;
public class HelloApp
public static void main (String[] args)
System.out.println("Hello, World");
}I cant see anything wrong with this piece of code. Ive definately saved the code as HelloApp.java. I've tried several different programs all with the same result. Does anyone have any ideas on why this is happening?
Thank You
Jaz

OK, classpath is different from path, it's specifically used by java to locate .class files.
Apparently some Windoze versions do not automatically include the local directory in the classpath - or may not have a classpath variable set until you do it manually.
So, the easiest way to see if this is your problem is to set the classpath in the command line like so:
java -cp C:\WhereIHidMyFiles HelloApp
(obviously, substitute the correct directory name above)

Cannot run any java Programs

I cannot get any java applications to run whenever I try I get
Exception in thread "main" java.lang.NoClassDefFoundError: jedit40install/jar
for any application that I try to run. I was able to compile a application but not run it. I tried launching it via java -classpath . jeditinstall.jar and i recieved the error again. I am running RedHat 7.3 on a 686 with 512mb ram. Below are my enviroment variables that I have set.
export JAVA_HOME=/usr/java/j2sdk1.4.0
export PATH=$PATH:$JAVA_HOME/bin
export CLASSPATH=.
Any help would be appreciated.

I'm not exactly sure of the root to your problem but maybe you can try setting the classpath to contain the JAR file that you are running?
Also...I think you should be launching a JAR file by:
java -classpath -jar jeditinstall.jar
Hope this helps :)

Problems running any Java applets

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