To how unzip trsuted applet jar file

hi to all,
I have created a trusted applet signed jar file.Now now i want to unzip the this jar file..but i am unable to do it......
so please help me
Thanks and Regards

Yes, I thought you would not like that answer. If you want a better answer, ask a better question. Provide useful information like what you have tried, what error messages you are getting, and so on. "I am unable to do it" is not useful information.

Similar Messages

How to load an applet jar file?

Hello everyone,
I have an applet that uses my own jar file and approximately 6 third party jar files. I set up jar indexing (jar -i) which will download the jar files when they are needed. All seems to work well, but now I want to manually load the jar files which I cannot get working.
When the applet starts, about 1/2 of the jar files are downloaded (because they are needed at startup). I then want to load the additional jar files in the background, after the gui is initialized. I have tried this using the below thread which is executed from within the applet's start method:
// Try to load additional jar files in background by loading a class from each jar file.
Thread loadClass = new Thread() {
public void run() {
    System.out.println("Loading classes...");
    try {
      // Tried loading classes this way, doesn't work.
      getClass().getClassLoader().loadClass("pkg1.Class1");
      getClass().getClassLoader().loadClass("pkg2.Class2");
      getClass().getClassLoader().loadClass("pkg3.Class4");
      getClass().getClassLoader().loadClass("pkg4.Class4");
      /* Loading classes this way doesn't work either.
      Class.forName("pkg1.Class1");
      Class.forName("pkg2.Class2");
      Class.forName("pkg3.Class3");
      Class.forName("pkg4.Class4");
    catch(ClassNotFoundException e) {
      // First attempt to load a class (pkg1.Class1) throws exception.
      System.out.println("Can't find class: " + e.getMessage());
loadClass.start();As you can see from above I am trying to load a class from each of the jar files so that the jar files would load into memory/cache. Unfortunately, it cannot find the classes. These are the errors from the java console:
Loading classes...
Loading: pkg1.Class1
Connecting http://my.server.com/my_dir/pkg1/Class1.class with no proxy
Connecting http://my.server.com/my_dir/pkg1/Class1.class with cookie "JSESSIONID=some_big_long_char_list"
Can't find class: pkg1.Class1
So it appears the jar file is not being downloaded. When I take away the dynamic jar loading (removing the "jar -i" & adding them all to the applet archive list) the thread executes correctly. So I know the class names, etc, are correct. How does one load an applet jar file?
Any help/suggestions are appreciated.

The above error I posted was because I forgot to index the jar files. That is why it couldn't find the jar file. I thought I was getting farther along with my problem, but I apparently just forgot to index the jars. I am now getting the problem that I got yesterday...
The applet freezes/hangs when it hits the thread. The GUI never opens (even though I'm running this thread right after the gui shows). The java console quits responding and the applet just stays the grey screen. I also tried the invoke later that you suggested.
public void start() {
// ...initialize gui...
// Applet freezes and remains grey, also the java console freezes.
javax.swing.SwingUtilities.invokeLater(new Runnable() {
    public void run() {
      System.out.println("Loading classes...");
      try {
        // When I comment out the below forName calls, the thread will still run evidenced through the done print statement.
        Class.forName("pkg1.Class1");
     Class.forName("pkg2.Class2");
     Class.forName("pkg3.Class3");
     Class.forName("pkg4.Class4");
        System.out.println("...Done loading classes");
      catch(Exception e)     {
        System.out.println("Can't find class: " + e.getMessage());
}

Question about Java Applet Jar file signing.

These questions pertain to Java 6 Standard Edition 1.6.0_22-b04 and later.
I have gone through the Oracle Java Tutorial for generate public and private key information
to sign a jar file, and how to sign the jar itself, all at
[http://java.sun.com/developer/onlineTraining/Programming/JDCBook/signed.html|http://java.sun.com/developer/onlineTraining/Programming/JDCBook/signed.html]
, and seek some clarification on the following related questions:
-In order to "escape" the java applet sandbox that exists around the client's
copy of the applet running in their web browser, ie.
(something forbidden by default), is verification of the signed applet enough, or is a policy file required
to stipulate these details?
-using the policytool policy file generator, what do I need to add under "Principals"
(if anything) when dealing with a Java applet? Are Codebase and SignedBy simply author information?
-If I choose to use a java.security.Permission subclass object set up in equivalent fashion within the Applet,
which class within the Applet jar do I instantiate that object in? Does it need to be mentioned
in the applet's jar Manifest.MF file?
-Is the "keystore database" a java language service/process which runs in
the Server's memory and is simply accessed and started by default
by the client verifier program (appletview/web browser)?
-The public key certificate file (*.cer) is put in the webserver directory holding
the Applet jar file (ie. Apache Tomcat, for example).
-Presumably, the web browser detects the signed jar
and certificate file, and provides the browser pop up menu asking the user
about a new, non recognised certificate (initially).
Is this so?
-With this being the case, can the applet now escape
the sandbox, be it with or without the stipulated
policy permissions?

848439 wrote:
-In order to "escape" the java applet sandbox that exists around the client's
copy of the applet running in their web browser, ie.
(something forbidden by default), is verification of the signed applet enough, or is a policy file required
to stipulate these details?Just sign the applet, the policy file is not necessary.
-Is the "keystore database" a java language service/process which runs in
the Server's memory and is simply accessed and started by default
by the client verifier program (appletview/web browser)?No.
-The public key certificate file (*.cer) is put in the webserver directory holding
the Applet jar file (ie. Apache Tomcat, for example).No. For a signed Jar, all the information is contained inside the Jar.
-Presumably, the web browser detects the signed jar
and certificate file, and provides the browser pop up menu asking the user
about a new, non recognised certificate (initially).
Is this so?No. It is the JVM that determines when to pop the confirmation dialog.
-With this being the case, can the applet now escape
the sandbox, ..Assuming the end-user OK's the trust prompt, yes.
..be it with or without the stipulated
policy permissions?Huh?

How to run my jar file on a webserver

hello everybody,
I've created a chat aplication which consists of a client-side and server-side. The client-side is an applet and is working fine. But i'm getting problem with the server-side. Actually, it is working fine on my local system and even in a local area network. But now, i want to put the server-side on a webserver. So, i want to know how can i do that. My server-side is a jar file "chatserver.jar" which i've developed using frame containers. I want to know also how to run the chatserver.jar on the webserver. Is it that i should have implemented jsp? Or javascript? coz my chatserver must be always running 24/7. It must not be available to user. users will chat through applets and the data will be sent to the server-side which will in turn control and recognise those data. Can anyone please help me in that issue.

that was very kind of u for replying to me. thanks a lot. Well, the web software i'm running is nothing soo great but it's simply a chat server side application. In this application, i'm using a thread where my datagram socket will keep on receiving data from clients and this server side apllication must response to the client. For example, if a client has added a new room, or a new user has logged in, the server side must take care to inform all other clients that a new user has just logged in or a new room has been created. The main method is in the "chatserver.class". Then, i've combined all my classes including the chatserver.class into a jar file. When i click on the jar file on my local system or on the server of a local area network, it works beautifully. So, my server side application works like that. I have to click on the chatserver.jar once and nothing else. No other interaction with the applicaion. But my problem is how to run it on a web-server like apache. Or even if i upload this software on a website, how do i make it run? Shall i implement jsp codes? If yes, how to execute such jar file using jsp?
here are part of the codes where my datagramsocket is receiving message from clients:
public void run()
     while(thread!=null)
          byte[] recbuf=new byte[65536];
          recpacket=new DatagramPacket(recbuf,recbuf.length);
          try{
               servsocket.receive(recpacket);
               if(servsocket==null)
     byte[] bt=recpacket.getData();
     String recvmess = new String(bt, 0, recpacket.getLength());
     InetAddress clientaddress=recpacket.getAddress();
     int clientport=recpacket.getPort();
     chatcom=new chatcom(this,clientaddress,clientport,recvmess);
     try{
          thread.sleep(10);
     catch(InterruptedException _INExc)
chatcom is another class which i've created to differentiate if the data received is a message, new room, new user, etc... I've created my own RFC to make those differences. Like i said above, if a client has created a new room, the chatcom class will recognise that a new room has to be created and will therefore send the new room created to all other clients. So, i want to know how to get my "chatserver.jar" run on a web server like apache or even on a website if i want to upload this software. Coz once it starts running, i dnt hav to close the application. I mean to say that this application will have to run 24/7. Do i have to execute it externally using jsp codes? Is there any way to get my application run on a webserver?

How should I create JAR file which contain JMF library and project classes

Hi,
I installed the JMF windows pack. I compiled and ran successfully myApplet (which use JMF librarie) in Internet Explorer on my machine. When I run this applet on some different machine, where JMF isn�t installed- it�s not running.
There is an error:
java.lang.NoClassDefFoundError: javax/media/ControllerListener
I was trying to create jar file, which contain librarie JMF.jar and all other files which are require to run myApplet (*.jar, *.class, the files from folder �MyApplet�) and run it on the other computer. It still doesn�t work.
Also I ran a JMF Customizer and created customize.jar but this file contains only JMF classes. I don�t know how add other files to it.
How should I create a jar file which will contains all essential files to run myApplet on other machine (something like �All In One� J )
I�m using Eclipse.
Can somebody help me?.
Thank You!
Best regards:
Peter

Hi
i want to make a jar file of application which is using JMF to play audio
and video. it works well during compilation and execution but doesn't
works in jar file.
please help me how i make a jar file whic will run audio and video too
your's truely
abdul

Multiple repeat downloads of applet jar file

We have an applet that is downloaded from a Weblogic server. The applet is packaged as a jar file. Some of the testers have been complaining that the applet is extremely slow to start up.
The applet start-up involves three phases. In a first phase, it fetches data from the server. This phase seems to execute in pretty much constant time. During the second and third phases, it constructs a UI using Swing objects. The UI includes some JPEG files, which are extracted from the applet's own jar file.
Testers report that the slow part of start-up is actually the UI setup. This should theoretically not be network-bound at all. But packet tracing reveals that during this phase, there's a large amount of network traffic going on. It turns out that there are multiple GET requests for the applet jar file being issued. Typically, 29 requests are issued in all; just for reference, the applet is required to extract 28 images from its jar file, so it looks as if the additional requests correspond to image requests.
One further detail: this does not occur where there is a fast connection to the server. In these cases, the applet is downloaded once. It looks as if the problem only occurs on slower network connections, and the speculation here is that the applet jar is somehow being downloaded only partially, so that requests for images somehow trigger a re-request of the jar file.
Has anyone seen anything similar and, more to the point, is there a fix or workaround?
Technical details: Internet Explorer 5.5 or 6.0, JRE version 1.4.2_01 Java HotSpot(TM) Client VM (on the client), WebLogic 8.1 (on the server)
Thanks in advance for any help.

Ok.
I have been trying hard and found the solution. One of the ablove posting says that it works under java 1.4.1 plug-in. That's infact absolutely true. It also says that how to run client using JRE 1.4.2 or higher. That can be solved two. This is definitely a bug with the 1.4.2 plug-in.
Follow this procedure that will solve the mystry.
----------------------start ---------------------------------
Problem
Download of applet is very slow
Why?
This was happening because of the repeated download of the applet jars by the applet plug in controller. It is quite clear that the Java 1.4.2 plug in controller has a bug that causes the plug in to download same jar files multiple times irrespective of Jar cache in the client side (configurable from client side using the Java plug in control panel) is enabled or disabled. Therefore, we have moved from 1.4.2 plug in to 1.4.1 (controlled from our client (JSP) code) that works fine.
What the client (applet client) should do?
You must do the following in the client side in order to avoid the long download time for applet when running from a browser. We have also found that the browser actually do not matter in slow applet downloads. It is only the plug in that does control the applet download.
Irrespective of what JVM you have already installed (or not yet installed) please do the following:
1. Download the JRE 1.4.2 from http://java.sun.com/products/archive/index.html
-At the time of its installation if it shows that the "JRE is already installed do you uninstall it?" Go ahead and uninstall the JRE 1.4.2. After the un-installation again install the JRE 1.4.2
-If it does not have the JRE 1.4.2 already installed, then you will see any warning window and you will be able to install the 1.4.2 JRE successfully.
2. Now, go to the same link and install JRE 1.4.1.
-If this JRE already installed, uninstall first like the step 1 above. then reinstall it.
3. Now, after successful installation of the JRE 1.4.1, open the Plug-In control panel.
-You will find the list of control panel(s) in the Start->Control Panel window. Use the control panel that shows the version number 1.4.1. If no version number shown then use the one that do not show any version number at its end.
4. Do the following on the Plug-In control panel.
-Verify if this is the 1.4.1 plug in control panel? Go to the "About" tab to see if it shows 1.4.1.
If it does not show the 1.4.1 (or 1.4.1_x) then plug in was not installed correctly. Reinstall the 1.4.1 JRE following the step in no-2
-Go to "Basic" tab and select "Show console" radio button.
-Go to "Advanced" tab and from the drop down select "JRE ...1.4.2" from the "Java Runtime Environment" drop down box.
-Go to "Browser" tab and select all that in the "Settings" box applicable for browsers.
-Go to "Cache" select "Enable Caching" if it is not selected currently. Select "Unlimited" from "Size" options.
Now hit "Apply" button at the bottom and close the control panel using the 'X'.
5. Restart your Windows machine.
6. You are ready to run the applet from any of the browser (IE, NS, etc.)
--------------------------end------------------------------

How to run a jar file

hi
can anybody tell me how to run a jar file in java,is there any need to unzip a jar file before running it?
Thanks in advance.

Set the classptha, if you want to run it by double clicking.
I assume that you know, how to set the classpath.I though that if it is an executable jar, the classpath environment variable will be completely ignored. Are you saying something to the contrary?

How to load a Jar file in the class path?

How to load a Jar file which contains class files, images, etc.. in the classpath without using URLClassLoader.

You don't "load" jars. If it's on the classpath, you can obtain individual resources from it using various methods on either Class or ClassLoader. Do you mean "how to add a jar to the classpath at runtime"? Can't be done without using a classloader, typically URLClassLoader or a subclass thereof. Why you want to not use the proven method is beyond me. Presumably because you don't understand classloading. In which case, forget it.

How to make a jar file downloadable with IE

hello,
I just bought a website:
http://www.frozenfountain.net/
and I put a jar file on it called Logo.jar
Using Mozilla, the jar file downloads as expected, but with Internet Explorer, it tries to download it as .zip file.
How do I get it to download as a .jar file with IE?
thanks

Just post a link to the Jar. Mozilla will download
it as a jar. Windows will download it as a zip.
Only one link. No problem, really. ;-)There is a problem. People who arent as good with computers as you are won't know how to run the jar file after downloading with IE.
At school, I told someone to download the file, which they did with IE. It downloaded to desktop as a zip. They extracted and were left with a bunch of .class files.
On a sidenote, how do you draw text with a gradient?

How to call a jar file from oracle forms (6i)

Hi,
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How to call a .jar file from a java bean?

any body knows how to call a .jar file from a java bean?

Crosspost!
http://forum.java.sun.com/thread.jspa?messageID=4349619

How to open a .JAR file on the Z30

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Would anyine know how to open a .JAR file on the Z30?
I get a message saying "Unable to open" when I click on the .jar file i want to open in my blackberry & install.
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JAR files are for older java phones, they dont work on BB10
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http://supportforums.blackberry.com/t5/Downloaded-Applications-for/You-Upgraded-to-OS-10-2-1-and-wan...
Click here to Backup the data on your BlackBerry Device! It's important, and FREE!
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How to run a jar file in JBuilder

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How to create a .jar file in wlcs3.1

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$JDK_HOME/bin/jar (%JDK_HOME%\bin\jar) shows you the syntax
where JDK_HOME is your jdk installation directory.
Kumar
hari wrote:
hello friends,
hi friends, im working on weblogic commerce server3.1 . i dont know how to create a .jar file in weblogic commerce server3.1. can any one knows send email to me.
thanks.
hari

How to call a .jar file in JSP

Hi Folks,
I would like to know how to call a .jar file in a JSP page..
Thanks in adv.

Any web app creating tutorial can. You know, if this doesn't ring a bell with you at all, I don't really feel inclined to explain it to you because I think you shouldn't yet be dealing with JEE in the first place.
http://java.sun.com/j2ee/tutorial/1_3-fcs/doc/WebComponents3.html

To how unzip trsuted applet jar file

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