Applet and signature

Hello All. This is my first post on this forum. I am clicking form Poland and please for tolerance for language's mistakes.
I signed applet like that:
1) keytool -genkey -keyalg rsa -alias tstkey
2) keytool -export -alias tstkey -file tstcert.crt
3) jarsigner moj_plik.jar tstkey ... and everything was ok. Applet asked for accepting the certificate and after that ran.
But when I have changed the GUI view and tried to sign it I got the information like that:
keytool error: java.io.IOException: Keystore was tampered with, or password was incorrect Does somebody know what's going on and how to iron out this problem?
Thanks for all ideas.

You probably will need to resign the applet.

Similar Messages

Certification Applet and Signature class

hi
I need a Certification Applet . how can i use Signature class for signing data with RSA_SHA_PKCS1 ?
i need a sample code. which class is better for this purpose? Signature class or Cipher class?
thanks,
siavash

i used Signature class for signing data with RSA.
how can i use private and public keys
for signing and verification correctly?
i signed my data with private key and verify it with public key,
but verify method returns false.

Accidentally denied a Java Applet and now it wont load whenever i click allow

Hi Everyone,
I had a moment when i clicked Deny on an applet and now whatever i do i cant get it to run.
The applet came up with the message
"An applet from "URL" is requesting access to your computer.
The digital signature could not be verified.
Allow / Deny "
It has always come up with this and i have always allowed it and it has run no problem. It is a VPN Dial in style applet to allow a remote connection to work based systems. I have always run it on Safari after Firefox stopped letting it run and it has been fine. But now it just attempts to connect for forever and never getting anywhere.
I am running Mac OSX 10.6.8 with all updates completed.
I have tried Safari, Firefox and Chrome and none will let it launch.
I have reset Safari, cleared the Java Preferences Cache, looked for any exceptions but have been unable to find anything unusual.
Any help would be greatly appreciated.
Many thanks

Hi akahn,
Retaking the exam is between you and your professor, however for the page not letting you click on "stay on page" after two finger swiping.
This is a javascript feature that the developer put into the page you were taking the test on. If you disable javascript however, the page may not continue to work. And this hack [http://forums.mozillazine.org/viewtopic.php?f=38&t=2083577] may break the functionality of the page as well. But for future situations disabling specific handlers may be a work around.
I wonder if there is a temporary way to disable the two finger swipe for when you take the test, yep.
The config entry is mentioned here: [https://support.mozilla.org/en-US/questions/926002#answer-328219]
Sorry about the test, hope it ends up well.

Difference Between Applet and Swing

Difference Between Applet and Swing

The advantages and disadvantages of both applets and Swing are the small fluffy elephants you get inside of every box. They're quite well trained and can skeletonize your neighbors' annoying pets upon command.

IIS, Javascript, Signed Applet and ASP Blank Page Problem

Hi,
I'm having a problem using a Signed Applet in a site that runs in a IIS (Windows Server 2003).
My aspx web page uses the applet to read my smart card and get information from it.
This applet uses an auxiliar dll (stored in a second Signed Jar file) in order to read the information from my smart card.
The way the solution is design:
1) Aspx page is asked from server
2) Internet Explorer recieve the page and asks the server for it content (images, applet, javascripts, etc)
3) After this the JVM runs (console opens)
4) After the Aspx page render fully a javascript register onload fires and call an applet method
5) Applet receive the call and run the logic of the method:
     - reads the smart card;
     - calls Javascript function in order to fill aspx fields with information from smart card
     - calls Javascript function the simulates a click in a botton of aspx page (in order to call server side part sending data readed from smart card to server)
5) The server makes some logic with the information receive and responds to client registering in aspx page a call to another Javascrit function
6) The client received the asnwer from server and runs the Javascript function registered on step 5)
     This Javascript calls another method from applet and runs the following logic:
     - reads more information from smart card;
     - call javascript function in order to fill more fields of aspx page with the information readed
     - calls Javascript function the simulates a click in a botton of aspx page (in order to call server side part sending data readed from smart card to server)
7) The server makes some logic and call another pages with no Applets
8) Client asks for a second page with the same applet and we start with another logic express on steps 1);2);3),4);5) and then 7).
This is all ok, until sometimes the server stop responding correcly for requests regarding this two pages with the Applet.
When this happens the server just responds with a blank page.
     - with fiddler I can seer the request for the aspx page (that uses the applet)
     - but server responds with a blank html page
The JVM doesn't fire.
The IIS log don't show errors.
The eventviewer doesn't show errors.
The problem is solved with an IIS reset or a Application Pool reset.
After a while the problem returns.
This problem occours for other user in another machine, the server just stops responding correcly to request regarding pages with applets, the other pages still continue to work.
If we disable Java Control Panel->Advanced->Java Plug-in->Enable the next-generation Java Plug-in the problem seend to stop, but we can't force all clients to disable this option right?
Or there is a way to force the Applet to run with this option disabled?
As anyone experience similar problem?
Regards,
OF

This is all ok, until sometimes the server stop responding correcly for requests regarding this two pages with the Applet.
When this happens the server just responds with a blank page.
- with fiddler I can seer the request for the aspx page (that uses the applet)
- but server responds with a blank html pageWell, if http requests look identical in case of success and failure (pay attention to cookies, etc) then it has to be something on the server side.
It could be that server gets into this wrong state because of previous requests made by applet but it is hard to tell.
I am not clear how old/new plugin can make a difference unless your applets run in the legacy mode (i.e. you are actually trying to reuse SAME instance of the applet when
it is loaded next time).
I'd start with
1) carefully comparing good/bad sessions
2) checking whether server will serve correct response to another client when it serves "bad" page for current client
3) add debug statements to aspx - it is scripted page, may be some condition is not met and then it returns blank?
4) record all http requests in one session until you get to "error" state and then use any http server testing tool to "replay" this set of requests.
You should be able to get server into the same state without use of applet. Then you can try to tweak set of requests to see what makes a difference.

I need help with Applets and Multithreading

[hello all. first time poster. big fan of java.]
now to the important matter: Applets and Threads
=======================================
1) I have an applet with that implements the runnable interface, and has one thread (and a simple animation). If I try to view this applet in the applet viewer with JGrasp, it spits an insane error telling me
"java.security.AccessControlException: access denied (java.lang.RuntimePermission modifyThreadGroup)"
but, if I run the applet through a web browser, by putting it in an html document, it runs correctly, without error
What on earth is wrong, and how do I fix it?!?
2) I want to put 2 threads in my applet?
If I implement the Runnable interface, I can only have one Run() method in my applet, right?
So how do I define behaviour for 2 threads when I only have one run method in which to define the behaviour? Can I use two threads with the runnable interface, or do I have to make objects of my own defined thread classes?
3) I tried to make 2 threads in my applet by creating my own thread classes, and instantiating them in my applet (instead of implementing the runnable interface).
I still get the same insane error as I mentioned in my first point (which I expected), except now, the applet won't work even when viewed through a web browser!!
Please please help me. I am frustrated beyond belief (at what is probably a very simple problem)
I have searched and searched all over and found no answers on this

If I try to view this applet in the applet viewer with JGrasp, it spits an insane error telling me
"java.security.AccessControlException: access denied (java.lang.RuntimePermission modifyThreadGroup)"Don't know anything about JGrasp, but it runs with pretty tight security - thats what this insane error is all about. Use the appletviewer or a browser.
If I implement the Runnable interface, I can only have one Run() method in my applet, right?Correct
So how do I define behaviour for 2 threads when I only have one run method in which to define the behaviour?
Can I use two threads with the runnable interface, or do I have to make objects of my own defined thread classes?You can create two Runnable implementations (classes) in your applet.
example (missing code)
class MyApplet extends Applet {
void doSomething() {
void doSomethingElse() {
void startThreads() {
    Thread t = new Thread(new Runnable() { public void run() { doSomething();}});
    t.start();
    t = new Thread(new Runnable2());
    t.start();
class Runnable2 implements Runnable {
     public void run() {
       doSomethingElse();
}If the above seems confusing, read up on anonymous and inner classes.
3) I tried to make 2 threads in my applet by creating my own thread classesTry not subclassing thread - this causes a security check

Socket communication failure between Java applet and C++ application

I have a java applet that connects to a C++ application via Java's ServerSocket and Socket objects. THe C++ application is using the Winsock 2 API. The applet and application are running on an NT workstation (SP 6) and using IE (5.5) For a very simple C++ test applications the communictions work fine. Once more code gets added to the C++ application the portion of the socket that C++ listens to seems to close. Upon performing a recv call the return value is a zero. Microsoft insists this is a sign the Java side has shut down the socket. The Java applet can still receive messages from the C++ app but C++ cannot receive responses from the Java side. Java throws no exceptions and an explicit check of the socket shows no errors. Again, what puzzles me is that it works for simple C++ applications. Are there any known conflicts between Java and C++ in this regard?
I have inlcuded the basic java code segments below.
/ run Method.
* This method is called by the Thread.start() method. This
* method is required for the implementation of the Runnable interface
* This method sets up the server side socket communication and
* contiuously loops looking for requests from a external
* socket.
* @author Chris Duke
public void run(){
     // create socket connections
     boolean success = false;
     try {
         cServerSocket = new ServerSocket(cPortID);
         System.out.println("Waiting for client to connect...");
         cClientSocket = cServerSocket.accept();
         System.out.println("Client connected");
         // Create a stream to read from the client
         cInStream = new BufferedReader(new InputStreamReader(
           cClientSocket.getInputStream()));
         // Create a stream to write to the client
         cOutStream = new PrintWriter(
           cClientSocket.getOutputStream(), true);
         success = true;
     }catch (IOException e) {
         System.out.println("CommSocket:Run - Socket Exception(1) " + e);
         success = false;
     // if the socket was successfully created, keep the thread running
     while (success){
         try{
            // check socket to see if it is still available for reading
            if (cInStream != null && cInStream.ready()){
                // check for an incoming message
                String message = ReceiveMessage();
                // Send message to listeners
                Event(message);
            if (cInStream == null){
                success = false;
                System.out.println("CommSocket:Run - shutdown");
         }catch (IOException e){
            System.out.println("CommSocket:Run - Socket not ready exception");
            break;
// SendMessage method -
* Sends a text message to a connected listener through port specified by portID
* @author Chris Duke
* @param String message - This will be the message sent out through the server
* socket's port specified by portID.
   public void SendMessage(String message){
      cOutStream.println(message);
      if (cOutStream.checkError() == true)
        System.out.println("SendMessage : Flush = Error");
      else{
        System.out.println("SendMessage : Flush - No Error");
   }

a very simple C++ test applications the communictions work fine. Once more code gets added to the C++ application the portion of the socket that C++ listens to seems to close.
This quite strongly implicates the extra code in the C++ App. The firstly thing I would try would be telnet. Try connecting to both versions of the C++ Application and manually reproducing a proper exchange.
a recv call the return value is a zero. Microsoft insists this is a sign the Java side has shut down the socket.
A correct implementation of recv should return the number of bytes received, or -1 for an error. A zero return indicates no bytes received not a socket closed/error. This sounds like FUD to me.
Are there any known conflicts between Java and C++ in this regard?
I can see no obvious faults, though the code is incomplete, I don't think it's an sockets implementation issue, at either end, it sounds more likely to be a protocol/handshaking bug in the C++ App.

How do I migrate settings and signature from one computer to another??

I have a new computer. I have installed Adobe X Pro on the new machine, and now I woudl like ot move my preferences and signatures over. What do I need to copy from one machine to the other???

You don't copy signatures, you'd copy digital ID files. The self-signed digital IDs that you create with Acrobat are saved as .pfx files (Win) or .p12 files (Mac). You can get the folder they're stored in via the Security Settings dialog in Acrobat:
More info: http://help.adobe.com/en_US/acrobat/X/pro/using/WS11dd809af63f0e1e-43e0464b12b4384d3b6-800 0.html#WSe02e12b45a94f4a2-537cbc1612fe1252143-8000

Security issues with applets and windows Vista when printing to file

Hi, everyone
I am currently developing an application that prints out the result of some calculations.
from a Javascript file, the output finally ends up in a java applet that should print the file in a special printer.
For debugging purposes I have created a File printer that creates a file from the output comming to the printer; this way I can debug what commands the printer is receiving.
This worked well on Windows Xp; Vista always asks for permissions for the applet, and altough I guarantee these permissions, printer is not allowed to create the output file and reports an error writing
after a little research, I have found that java applets have all permissions when certificated as trusted applications; all but file creating permissions
anyone has any idea of how could I fix this problem?
Thanks in advance

HI,
Have you actually signed your applet? If the signers certificate is the trusted key store for Java it should treat your applet as trusted. You can use a self signed certificate for testing as long as the cert is in the trusted key store.
Some links that might help:
[http://java.sun.com/j2se/1.4.2/docs/tooldocs/windows/keytool.html]
[http://java.sun.com/j2se/1.4.2/docs/guide/plugin/developer_guide/rsa_signing.html]
Cheers,
Shane

I'm crazy!Applet and JNA Error:Library 'jnidispatch' was not found!

Hi all,
sorry to bother you, I really have no idea how to do JNA and Applet. I'm hardly mazy, man.
Every time it will throw an error to me :
Exception in thread "thread applet-JNAApplet-1" java.lang.UnsatisfiedLinkError: Library 'jnidispatch' was not found by class loader sun.plugin2.applet.JNLP2ClassLoader@291aff
     at com.sun.jna.Native.getWebStartLibraryPath(Native.java:858)
     at com.sun.jna.NativeLibrary.<clinit>(NativeLibrary.java:576)
     at com.sun.jna.Library$Handler.<init>(Library.java:140)
     at com.sun.jna.Native.loadLibrary(Native.java:372)
     at com.sun.jna.Native.loadLibrary(Native.java:357)
     at JNAApplet.init(JNAApplet.java:15)
     at sun.plugin2.applet.Plugin2Manager$AppletExecutionRunnable.run(Unknown Source)
     at java.lang.Thread.run(Unknown Source)My program is so easy, I just want use Applet to revoke JNA and use the JNA to load a native lib.
here is the structure of my program:
Applet code :
import javax.swing.JApplet;
import javax.swing.JButton;
import javax.swing.JPanel;
import com.sun.jna.Native;
public class JNAApplet extends JApplet {
     public static Kernel32 kernel32 = null;
     @Override
     public void init() {
          createGUI();
          kernel32 = (Kernel32)Native.loadLibrary("Kernel32", Kernel32.class);
          if (kernel32 == null) {
               System.out.println("load kernel32 fail!");
          } else {
               System.out.println("load kernel32 success!");
     private void createGUI() {
          JPanel panelCenter = new JPanel();
          JButton butTest = new JButton("Test");
          panelCenter.add(butTest);
          setContentPane(panelCenter);
}When I run it on debug mode, it is ok! but when I deploy it , it will throw above error message to me.
My Applet html:
<html>
     <head>
          <title>JNA Applet</title>
     </head>
     <body>
     <script src="deployJava.js"></script>
    <script>
        var attributes = { code:'JNAApplet', width:300, height:300} ;
        var parameters = {jnlp_href: 'JNAApplet.jnlp'} ;
        deployJava.runApplet(attributes, parameters, '1.5');
    </script>
     </body>
</html>File 'JNAApplet.jnlp':
<?xml version="1.0" encoding="UTF-8"?>
<jnlp spec="1.0+" codebase="" href="">
    <information>
        <title>JNA Applet</title>
        <vendor>Steven</vendor>
    </information>
    <resources>
        <j2se version="1.5+"
              href="http://java.sun.com/products/autodl/j2se" />
        <jar href="JNAApplet.jar" main="true" />
    </resources>
    <applet-desc
         name="JNA Applet"
         main-class="JNAApplet"
         width="300"
         height="300">
     </applet-desc>
     <update check="background"/>
</jnlp>     I really have no idea. and I can't search any usefull infomation from Google and officer site.
Can any one help me? Thank you very much!!!!

Hi AndrewThompson64:
Did you mean the JNA project? Or are you refering to JNI, or ..something else?Yes, I mean is that I wanna jna.jar to replace JNI to code with Applet. I want Applet can run native library(.dll files).
That reads like so much nonsense to me.Sorry fo that.
Was there any 'caused by' part that you trimmed? I expected to see something to do with 'Security' or 'AccessControl'.Sorry, I can't saw any 'cause by' subsentence there. This message is just gain from Applet Console.(Is there any method to gain more message?)
About 'Security' and 'AccessControl' I just modify my java.policy file to allpermission. Subsequently, I signed all jar files.
For now I have 3 jar files(all have been signed ):
--example.jar : for this little program.(code include applet and application entry)
--jna.jar
--win32-x86.jar : include kernel32.dll and jnidispatch.dll for win32 and x86.
and 2 JNLP files:
--JNAApplet.jnlp the entry is JNAApplet.class (this jnlp does not work)
--JNAApp.jnlp     the entry is JNAApp.class (this jnlp works)
And for now new error message show like this:
Exception in thread "thread applet-JNAApplet-1" java.lang.UnsatisfiedLinkError: Library 'Kernel32' was not found by class loader sun.plugin2.applet.JNLP2ClassLoader@4aeb52
     at com.sun.jna.Native.getWebStartLibraryPath(Native.java:858)
     at com.sun.jna.NativeLibrary.loadLibrary(NativeLibrary.java:97)
     at com.sun.jna.NativeLibrary.getInstance(NativeLibrary.java:228)
     at com.sun.jna.Library$Handler.<init>(Library.java:140)
     at com.sun.jna.Native.loadLibrary(Native.java:372)
     at com.sun.jna.Native.loadLibrary(Native.java:357)
     at JNAApplet.init(JNAApplet.java:12)
     at sun.plugin2.applet.Plugin2Manager$AppletExecutionRunnable.run(Unknown Source)
     at java.lang.Thread.run(Unknown Source)
Did you mean invoke?
Revoke: To annul by withdrawing.
Invoke: To call on.Yes, you got it. Thank you.
The JNLP file is invalid. ..I was about to put my 'standard' text here, but I'm sick of saying it. Search the forum for my posts - 50% of them, at least, mention validation and how to go about it.
Also, the applet-desc requires a documentbase.Thank you, I really think I have some invalid section. But I can't find it, and you said 'Search the forum for my posts - 50% of them...' , I can read the JNLP structure on site of sun and I can to read you post too(I'm doing like this).*I only want to know about how to load "native lib like *.dll" properly*.
What 'officer site'?I mean jna project site. Sorry for ambiguity.
Please fix that sticky '!' key. One '!' indicates astonishment, while two or more typically indicates a bozo. Thanks for your advice. Because I tried to find solution do my best lasting two days. I got nothing. I'm sadness.
here post my new files:
import javax.swing.JFrame;
import com.sun.jna.Native;
public class JNAApp {
     public static Kernel32 kernel32 = null;
     public static void main(String[] args) {
          // TODO Auto-generated method stub
          kernel32 = (Kernel32)Native.loadLibrary("Kernel32", Kernel32.class);
          JFrame frame = new JFrame();
          frame.setSize(500, 500);
          frame.setVisible(true);
import javax.swing.JApplet;
import javax.swing.JButton;
import javax.swing.JPanel;
import com.sun.jna.Native;
public class JNAApplet extends JApplet {
     public static Kernel32 kernel32 = null;
     public void init() {
          createGUI();
               kernel32 = (Kernel32)Native.loadLibrary("Kernel32", Kernel32.class);
     private void createGUI() {
          JPanel panelCenter = new JPanel();
          JButton butTest = new JButton("Test");
          panelCenter.add(butTest);
          setContentPane(panelCenter);
<?xml version="1.0" encoding="UTF-8"?>
<jnlp spec="1.0+" codebase="" href="">
    <information>
        <title>JNA Applet</title>
        <vendor>Steven</vendor>
    </information>
    <resources>
        <j2se version="1.5+"
              href="http://java.sun.com/products/autodl/j2se" />
         <jar href="JNAApplet.jar" main="true"/>
         <jar href="jna.jar"/>
    </resources>
       <resources os="Windows" arch="x86">
         <nativelib href="win32-x86.jar"/>
         <nativelib href="kernel32.jar"/>
       </resources>
    <applet-desc
         documentBase=""
            name = "success"
         main-class="JNAApplet" width = "200" height = "200">
     </applet-desc>
     <update check="background"/>
       <security>
         <all-permissions/>
       </security>
</jnlp>
<?xml version="1.0" encoding="UTF-8"?>
<jnlp spec="1.0+" codebase="" href="">
    <information>
        <title>JNA Applet</title>
        <vendor>Steven</vendor>
    </information>
    <resources>
        <j2se version="1.5+"
              href="http://java.sun.com/products/autodl/j2se" />
         <jar href="JNAApplet.jar" main="true"/>
         <jar href="jna.jar"/>
    </resources>
       <resources os="Windows" arch="x86">
         <nativelib href="win32-x86.jar"/>
         <nativelib href="kernel32.jar"/>
       </resources>
    <application-desc
         main-class="JNAApp">
     </application-desc>
     <update check="background"/>
       <security>
         <all-permissions/>
       </security>
</jnlp>     Thanks & Best Regards,
Su Heng

Body and Signature not getting in reciever mail adapter

Hi Friends,
My requirement is the reciever mail adapter having the Attachment and Body and signature.
Here i am getting Attachment only. I am not getting Body( example: the ftp successfully genrated this file abbc_12/03/2014.txt) and Signature.
Signature like
Thanks
company name.
Thanks
Bhanu

Hi Galla,
I have some doubts about your scenario, Is your scenario FTP to MAIL?, do you want to send the file as attachment or you want the file content as mail body or where the body is taken? where is the signature, inside the file?
Meantime, you can check these documents about file-mail scenario:
http://www.sdn.sap.com/irj/scn/go/portal/prtroot/docs/library/uuid/a0a27c01-26b0-2c10-bd8a-94498efa7ff6?quicklink=index&overridelayout=true
http://www.sdn.sap.com/irj/scn/go/portal/prtroot/docs/library/uuid/5083371b-5bd2-2e10-3f8b-ad877d24c9ce?QuickLink=index&overridelayout=true&52475910426407
Regards.

Upgraded to Acrobat X and signature field stop working

Upgraded to Acrobat X and IntegriSign signature field stop working. When I open the pdf and click on the signature field I get a "This plug-in is intended for validating signatures signed using earlier versions of Acrobat. To sign using this version of Acrobat, use "IntegriSign for Acrobat 9.0 and later" handler.
Under Perferences in Acrobat, 9.0 and later is checked.
In LiveCycle Designer - IntegriSign is indicated for Signature handler.
Can't figure out how to solve this. I have uninstalled, reset IntegriSign and Adobe settings a trillion times!
Please help!

I tried these steps several times. Kinda long:
Here are the steps to setup ePad signatures with Adobe Acrobat 9 and later:
>
> You will need to create a self signed certificate (id) and have IntegriSign select this to be used with Acrobat. Here are the instructions:
>
> 1. In Adobe Acrobat choose Advanced > Security Settings.
>
> 2. Select Digital IDs on the left, and then click the Add ID button.
>
> 3. Select Create a Self-Signed Digital ID for Use with Acrobat, and click Next.
>
> 4. Specify Windows Certificate Store, to store the digital ID, and click next.
>
> 5. Type your name, email address, and other personal information for your digital ID. When you certify or sign a document, the name appears in the Signatures panel and in the signature field.
>
> If the computer is for public signing, you can replace your name with the name of the PC. It is not practical to have a digital id for every person that signs. IntegriSign will still ask for the signers name and signature.
>
> 6. Go to Windows start => all programs => IntegriSignDesktop => Desktop => Desktop Configuration => Select button (under certificate selection in the lower right of the window). At this time, you should see the digital id you just created.
>
> 7. Choose the certificate you just created, and click the OK button.
>
> 8. Go to Adobe Acrobat ->Edit -> Preferences -> Security, click on the Advanced button and make sure IntegriSign for acrobat 9 and later is selected as the default in the Creation. Also make sure the Verification is set to default method and the method is IntegriSign for Acrobat 9 and later.
>
> If IntegriSign is not an option then go under Edit/Preferences-->General (not Security) find the "Application Startup" checkbox 'Use only certified plug-in' CHECKED. Uncheck the box and repeat the first procedure.
>
> 9. Now, open a PDF file, and perform the signature using ePad, and should be able to sign.

How to access a file via Applet and JavaScript

I want to copy one file on the client machine from one place to another place from a Java Bean.
To do this I created an applet and a Java Bean as follows:
import java.applet.*;
public class FileUtils extends Applet {
    public void copyFile(String src, String dest) {
    private String source, destination; // setters/getters are there of course
    public void copyFile(ActionEvent actionEvent) { // Bean
        FacesContext fctx = FacesContext.getCurrentInstance();
        ExtendedRenderKitService erks = Service.getRenderKitService(fctx, ExtendedRenderKitService.class);
        String command = "var s = '"+ source +"'; var d ='" + destination +"'; " + " document.fileUtilsApplet.copyFile(s, d); ";
        erks.addScript(fctx, command);
    }Then I added the APPLET tag referencing the above class in the page fragment:
                <f:verbatim>
                    <applet code="FileUtils.class" name="fileUtilsApplet" height="30"
                            archive="/context-root/Applet.jar"
                            width="200">
                    </applet>
                </f:verbatim>From the Java console I can see the jar is successfully downloaded, but when the code in the bean is executed, the JavaScript code does not seem to do anything, as if the "copyFile" public method was not called at all and no output in the Java Console as well.
Note that I already followed the guidelines at http://www.oracle.com/technetwork/developer-tools/adf/learnmore/71-adf-to-applet-communication-307672.pdf .
Do you have any ideas?

Ok, I can see the permission problem now:
java.security.AccessControlException: access denied (java.io.FilePermission c:\myfile.txt read)
     at java.security.AccessControlContext.checkPermission(Unknown Source)
     at java.security.AccessController.checkPermission(Unknown Source)
     at java.lang.SecurityManager.checkPermission(Unknown Source)
     at java.lang.SecurityManager.checkRead(Unknown Source)
     at java.io.FileInputStream.<init>(Unknown Source)
Edited by: user10047839 on 1-feb-2013 7.29
signing the Jar and downloading the certificate permanently does not change anything in Firefox. The Java console keeps giving the above exception.
Any idea?

Deploy Applet and MySQL - how to read and write

Question on deploying Applet and MySQL
I am building an applet that is to be a part of a simple game. The applet is supposed to read data from a MySQL server and use it to place towns on the map. In addition, the applet must be able to write to the base.
I have build a prototype and ran it in netbeans on my computer. It then successfully read data from a local MySQL base. HOWEVER; when I embed the applet in html code it no longer reads from the base. My method for connecting to the base is
try{
Statement stmt;
ResultSet rs;
Class.forName("com.mysql.jdbc.Driver");
String url=adress;
Connection con=DriverManager.getConnection(url, user, user);
stmt=con.createStatement();
rs=stmt.executeQuery("SELECT * " +
"from "+table+" ORDER BY id");
while(rs.next()){
get data...
Town T=new Town(data...); //construct town object
TL.put(T); //put town objects in an object TownList to use later
con.close();
catch(Exception e){
So;
1) Why wont the applet read anymore?
2) Is there a better way to do this? I have heard that its better to connect applets to servlets in some situations. What demands does this place on the server? Is there software that you need to install on the server to use servlets?

I think I do need an applet. The map I have written permits a lot of features that I dont know how to achieve in another way.
1) Zooming in and out on mousewheel
2) Clicking on on two towns gives the distance and by selecting a trooptype one can get information about the traveltime between cities.
3) Right now, I have a feature to find players or groups of players that are of special interest. It allows a player to submit a list of interesting players. The applet reads this list and provides a button with the players name. If one clicks the name of a player, all his cities flash between their originall color and white (using thread).
I need java to do this and I need to run it in a webbrowser because there are som parts of the game that is made up of php. So I assume I have to build it as an applet?

Help. How do you TAB from HTML component to applet (and back) ?

How can one tab between applets in a browser, and from an applet to an HTML component?
For example, I have the following in my page in decending order:
an HTML text field,
an applet containing two components,
and another HTML text field.
When focus is on the first HTML text field pressing TAB should shift focus to the first component of the applet, the next TAB press shifts focus to the second component of the applet, and the next TAB press shifts focus to the other HTML text field. Then another TAB press cycles back to the first TEXT field.
I can handle the tabbing within the applet using the FocusManager, but how can I get the applet to receive focus on a TAB from the browser, and once the applet has focus, how can I give focus back to the browser when a TAB occurs from my last applet sub-component?
At the moment a user has to click on the applet before he can tab in it, and then click outside it to tab in the html again.
Any help appreciated, as I cant find any reference to how to do this apart from other people asking the same but getting no replies.
Thanks,
Menno

I see what you are saying. Either use javascript with LiveConnect or go all applets.
What we are actually doing at the moment is trying to componentise using small applets passing data via InfoBus. So I guess we could use only applets as you suggest. Either with getAppletContext, or we could have a data item on the InfoBus which contains the name of the required in-focus applet, and all applets listen to see if it is their name, and if so request focus.
I'm suprised applets are not tab-able between by default. I would have thought this was a common requirement.
I'll look into LiveConnect as well, and let you know how we get on.
Cheers,
Menno

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