Including multiple jar files to applet

In one of my application I am using severla third party apis (JavaHelp, JFreeReport, NanoXml ...) which comes as a seperate jar file each.
Is there is a way that I can include these multiple jar files to be downloaded automaticaly when the applet is starting.
currently I am extracting all the jar files and then re compressing them in to one file and place it in the archive property in the applet tab.
Is there a way I can avoid extraction and recompression and directly use the jar files

<param nama="archive" value="myjar.jar, myOtherjar.jar" />
You could try to create an installer that wil put the 3rd party jars in the users lib/ext directory.

Similar Messages

Multiple jar files from different locations

Hello,
I am having an applet that access code from two different jar files. Of them one is a common jar file for many applets. So I couldn't place it in the local dir as that of the applet's html. I am not using any web server.
     Just to give you a feel of it :
     <PARAM NAME = archive VALUE = "DVApplet.jar,DVVP.jar" > are the jar files my applet is dependant on. But DVVP.jar has to be accessed from a dir different from local dir.
     Will be glad if someone can throw some light on accessing different jar files from different dirs.
     Thanks for your time.
Regards,
Anantha

[url=
http://forum.java.sun.com/thread.jsp?forum=421&thread=425724&tstart=0&trange=100
]This question is a bit similar
You can use a class loader to do such things.

ANT how to include NetBeans Jar files in my script of ANT ??

ANT how to include NetBeans Jar files in my script of ANT ??

I mean the library say swing layout ...
which is SwingLayOuts1.0.jar ...
in side this there is folder org.jDesktop....
I want this folder in my jar file ...
also ....
My question ... i know the path of the jar file of NetBeans .... i can copy that ...dirctly ... but if m using Netbeans editor ... can i give NetBeans class to my jar command for ANT...........

Including a jar file inside an executable jar file

Is it possible to include a jar file inside another (executable) jar file such that the included file is part of the class path for the outer file? If so, how do you specify this in the classpath in the manifest?

Russ_Bjork wrote:
Is it possible to include a jar file inside another (executable) jar file such that the included file is part of the class path for the outer file?No. Actually, I suppose it would be possible if you do all the 'heavy lifting', but Java is not designed to handle Jars within Jars.
What do you see as the advantage of doing that?
Is your app. a rich client (e.g. Swing, AWT, SWT..)?
Can you distribute the app. from a server or the internet?

ANT - Jar File include another Jar file and importing classes

Here is the directory structure i have set up:
FTPGetter
\src
    \com
      \abc
        \ftpgetter
          - GUI.java
          - FTPGetter.java
          - Login.java
\classes
\include
    - ftpClient.jar
    - info.xml
\jar
    - FTPGetter.jarThe code compiles file and can create a Jar file without errors. But when I execute the Jar file, I get
java.lang.NoClassDefFoundError: com/abc/ftpclient/FTPwhich is a class that I import from the ftpClient.jar file in FTPGetter.java
What gives?
Here is my necessary build.xml code:
<?xml version="1.0"?>
<project name="FTPGetter" default="all">
<property name="src.dir"        value="src"/>
<property name="package.name"   value="com.abc.ftpgetter"/>
<property name="package.dir"    value="${src.dir}/com/abc/ftpgetter"/>
<property name="classes.dir"    value="classes"/>
<property name="include.dir"    value="include"/>
<property name="jar.dir"        value="jar"/>
<property name="javadoc.dir"    value="docs"/>
<property name="javadoc.title" value="FTPGetter"/>
<property name="javadoc.header" value="FTPGetter - By ABC XYZ [2005]"/>
<property name="run.classname" value="${package.name}.FTPGetter"/>
<target name="init">
    <mkdir dir="${javadoc.dir}" />
    <mkdir dir="${classes.dir}" />
    <mkdir dir="${jar.dir}" />
</target>
<target name="all" depends ="compile,jar" />
<target name="compile" description="Compile Java code" depends="clean, init">
    <javac srcdir="${package.dir}" destdir="${classes.dir}">
      <classpath>
        
        <pathelement path="${classes.dir}" />
        
        <fileset dir="${include.dir}">
          <include name="**/*.jar"/>
        </fileset>
      </classpath>
    </javac>
</target>
<target name="clean" description="Clean up">
    <delete dir="${javadoc.dir}" />
    <delete dir="${classes.dir}" />
    <delete dir="${jar.dir}" />
</target>
<target name="jar" depends="compile">
    <jar jarfile="${jar.dir}/FTPGetter.jar" update="false">
      <fileset dir="${classes.dir}" includes="**/*.class" />

      <fileset dir="${include.dir}" includes="info.xml" />

      <fileset dir="${include.dir}" includes="ftpClient.jar" />
      <manifest>
        <attribute name="Main-Class" value="com.abc.ftpgetter.FTPGetter" />
        <attribute name="Class-Path" value="include/ftpClient.jar"/>
      </manifest>
    </jar>
</target>
</project>

nevermind I got that fixed now:
had to get the build.xml code for the <target name="jar" depends="compile">so that it looks more like:
<target name="jar" depends="compile">
    <jar jarfile="${jar.dir}/FTPGetter.jar">
      <zipfileset dir="classes" prefix="" />
      <zipfileset src="include/ftpClient.jar" />
      <zipfileset dir="${include.dir}" includes="info.xml" />
      <manifest>
        <attribute name="Main-Class" value="com.abc.ftpgetter.FTPGetter" />
      </manifest>
    </jar>
</target>Keyword would need to be zipfileset.

Can i load a class in subdirectoy inside a jar file using applet tag?

hi every one.. thank you for reading ... i am really in dire need for the solution..
my problem is that i have a jar file contianing a package which inturn contains my applet class...
i am trying to access this applet class using a applet tag in html file. this html file is in same directory as the jar file. i am having no problems in windows but when i am doing this in linux apache server i was getting class not found exception. (already checked the file permissions). and when i am successful when using simple package directory instead of jar file . so gist of my quesition is "can i load a class in subdirectoy inside a jar file using applet tag in a html file"?

When you tested in Windows were you using Internet Explorer? On Linux you will be using a different browser, usually Mozilla of some version, or Firefox. Note that the HTML tags for applets will be different between the browsers if you are using the object tag. Principally the classid value for the object tag will differ between Firefox and Internet Explorer.

To include a JAR file that contains enterprise beans in a WAR module

1)I'm studying java ee tutorial in 6 but I do not understand what he means by "To include a JAR file that contains enterprise beans in a WAR module, add the JAR to the WEB-INF/lib directory of the WAR module" at this link:
http://docs.oracle.com/javaee/6/tutorial/doc/gipio.html
how do I create a file. jar to hold the enterprice beans in netbeans?
2)
as regards the case study prensete always in the tutorial "dukes-forest" I do not understand how it is structured, I think that the "dukes-store" is a web application (web module. war) to which are added other projects "entities "etc. .. is that correct? if it is right how do I create the project "entities" in netbeans? how do I add it to the project "dukes-store"?
link at case study del tutorial:
http://docs.oracle.com/javaee/6/tutorial/doc/glnpw.html

Hi,
I have also tried putting the actual jar file in my
jar file that I created, that didn't work either.
I didn't try extracting the contents of the jar file
into mine because the directory structure would
conflict my dir structure in the jar file (manifest
file that is)Out of curiosity are you trying to use executable jar files? If so you might want to put the classpath in the manifest using Class-Path: blah.jar etc. Be remember that this resolves to the disk filesystem not the internals of the jar that is being executed. In other words - the blah.jar file resides in the same directoy on the disk as your executable jar.
If you could clearly describe what you are trying to achive and how it is structured I am sure we could give you more pointers.
TTFN

Jar files and applet

My applet class is using other classes in my package,
So do i need to create a jar file and specify that jar file in <applet archieve = :myjar.jar"
I did created the jar file , but its not loading up, the browser just says Loading java applet, what might be the reason, does it depends on size of jar file?
or my tags are wrong.
my applet tag is
<html>
<applet archive = "myjar.jar"
code = "front.class"
width.. >
the front.class file is also in myjar.jar.
Any help....
Also one more question,
Can i call other applets within one applet class.
I have a gui, when a particular button is clicked on applet
i want to go to other applet, so how should i call it in that buttons action listner?
And in my applet class i am using one other class from my package which actually coonects to databse through JDBC. now say i have a button on my applet whihc says "Connect", and when that button is clicked then I created object of my other class which makes connection
through databse. So will this work from applet?
Thanks

You didn't show all of your applet tag, but it should look like this:
<HTML>
<APPLET CODE = front.class, ARCHIVE = myjar.jar, width = ???, height = ???>
</APPLET>
</HTML>
Assuming your applet is not crashing, this should load it. I recommend using the appletviewer tool in the JDK, it provides more detailed error messages. I hope this works for you.
Now inter-applet communication. This is forbidden, sorry. However, if you really want to get fancy; remember that all applets can communicate back to the host from which they came. So if you want to build a small server on your host machine which all your applets log into, they can then communicate with each other through the server.

Accessing web application JAR files from applet

I've got an applet which is part of a web application.
All the web application JARs are in the webapps/myappl/WEB-INF/lib directory, and I
can't seem to place anything in that directory on the archive attribute of <OBJECT> tag.
I'm running into trouble because I'm sending objects from the servlet to the applet and keep getting classnot found during deserialization because I've missed some jar file on the archive attribute. I've had to copy lots of jar files up to where the codebase in the HTML file is to make this run. My question is this.
Is it better to just change the tomcat security policy file (catalina.policy in tomcat conf directory) so that the JARs are directly accessible and I don't have to copy them from WEB-INF/lib???? Has anyone done this before? What would the line look like?
I'm assuming that I have to follow the instructions (THAT I DON'T UNDERSTAND)
at the bottom of the policy file. Can someone help me out here????
should I have something like
grant codeBase "file:${catalina.home}/webapps/myappl/WEB-INF/classes/-"
{ permission java.security.AllPermission; };
grant codeBase "file:${catalina.home}/webapps/myappl/WEB-INF/lib/-"
{ permission java.security.AllPermission; };
Will this allow me to place references to jar files (and the classes directory) in the archive attribute, such as
<OBJECT ..... >
    <param name="archive" value="../WEB-INF/lib/applet.jar,../WEB-INF/lib/someapp.jar,../WEB-INF/classes" />trailer for catalina.policy is
// You can assign additional permissions to particular web applications by
// adding additional "grant" entries here, based on the code base for that
// application, /WEB-INF/classes/, or /WEB-INF/lib/ jar files.
// Different permissions can be granted to JSP pages, classes loaded from
// the /WEB-INF/classes/ directory, all jar files in the /WEB-INF/lib/
// directory, or even to individual jar files in the /WEB-INF/lib/ directory.
// For instance, assume that the standard "examples" application
// included a JDBC driver that needed to establish a network connection to the
// corresponding database and used the scrape taglib to get the weather from
// the NOAA web server. You might create a "grant" entries like this:
// The permissions granted to the context root directory apply to JSP pages.
// grant codeBase "file:${catalina.home}/webapps/examples/-" {
//   permission java.net.SocketPermission "dbhost.mycompany.com:5432", "connect";
//   permission java.net.SocketPermission "*.noaa.gov:80", "connect";
// The permissions granted to the context WEB-INF/classes directory
// grant codeBase "file:${catalina.home}/webapps/examples/WEB-INF/classes/-" {
// The permission granted to your JDBC driver
// grant codeBase "file:${catalina.home}/webapps/examples/WEB-INF/lib/driver.jar" {
//   permission java.net.SocketPermission "dbhost.mycompany.com:5432", "connect";
// The permission granted to the scrape taglib
// grant codeBase "file:${catalina.home}/webapps/examples/WEB-INF/lib/scrape.jar" {
//   permission java.net.SocketPermission "*.noaa.gov:80", "connect";
// };

Thank you for your reply.
As I mentioned in my first post I had seen a couple of posts mentioning ServletContext before, but dismissed them as I am not using any servlets of my own. However, since you showed me exactly how it was used I realised I could probably just use a dummy servlet to get this information.
The following page suggests a couple of techniques for doing just this.
http://www.jguru.com/forums/view.jsp?EID=1087411
So I think that's me sorted, cheers.

Download and extract jar file from applet

Can any one provide me a solution for my below problem. Thanks in advance for all the suggestions.
I want my applet to download a jar file, extract into users home directory by creating a folder and then set the created folder to java library path.
My applet html file is in "root" directory. The applet is included into applet.jar and placed under "lib" directory which is under "root" directory.
Now i also had another jar file(contains dlls what I packed) under the same lib folder.
The below is the following directory structure in my server.
root ---
     |
     |
     default.html
     lib--
     |
     |
     applet.jar - contains applet related classes
     native.jar - contains dlls which are to be loaded
When a client downloads my applet, it should copy the native.jar and then extract into a new folder under user home directory. Then set this folder to java library path.
Regards
raman kumar

I managed to do it this way, Just remember that you need to sign the jar files for your applet, else it won't work.
package jar.extract;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.util.jar.JarFile;
import java.util.zip.ZipEntry;
public class JarExtractor {
     // Dll file in the jar
     private static String JAR_FILE = "dll.jar";
     public void extract() {
          try {
               JarFile jf = new JarFile(JAR_FILE);
               // Entry in the jar file rember package and dll file
               ZipEntry ze = new ZipEntry("package/dll_file");
               int length = (int) ze.getSize();
               byte fileContent[] = new byte[length];
               InputStream fin = jf.getInputStream(ze);
               fin.read(fileContent, 0, length);
               // CODE missing.
               // You need to write the input stream (fin) to a new files output stream
               // it is like copying a file !!!
          } catch (IOException e) {
               e.printStackTrace();
}Tom

JSP include from jar file

I have a service that is packaged in a jar file that contains a jsp file that I want to use inside a <jsp:include>
in my webapplication. Is this possible?
<jsp: include .. jspFileInJarInWEB-INFLIB.jsp/>

The JSP fragment page in question is actually a HTML form page. It is a form to be used specifically by a particular servlet. That is why they are "bundled" together in the same project, in the same package structure.
I have multiple web applications that I want to include that form/servlet, so it gets added to these projects in the /WEB-INF/lib folder as a JAR library. But I don't want to recreate the form over and over again for each application. It would be nice if I could write a JSP page that wraps the fragment using an include directive to bring that fragment into the new page.
So to do that with any other fragment I would write:
<%@ include file="/WEB-INF/jsp/SOME_FORM.jsp" %>
which works great if my fragment page is in the /WEB-INF/jsp subfolder. But if I want to access the JSP fragment as it is bundled in a JAR file, this:
<%@ include file="/WEB-INF/lib/FORM.jar/SOME_FORM.jsp" %>
doesn't work so good. It's just all wrong.
I was wondering how I could just write one include statement to get what I need. There are work-arounds galore, but I thought if I could get this working it would be the simplest solution overall.

Getting JAR file for Applet doesn't work

Hi,
We have the following problem: we have some clients who want to use our applet. There are some clients that have problems with receiving the .jar file:
When the applet tries to start we get a ClassNotFoundException: 'prestaties.class' not found. (the client wants to acces the class file directly from the server)
If we check the .jar file, it exists on the client, but the file is empty.
What could be the problem?
- PRoxy or firewall blocks the jar file
- applet doesn't have enough rights to write.
Does anyone a solution, some workarounds or suggestions for this problem.
Thanks!
Luk

Hi,
Thanks for answering my question!
Here is the extra information you asked.
At server side everything is OK (the jar file is present and has all the class files).
Where working with Weblogic server 4.51
The clients run JRE 1.3.0-C
I can't give you the applet code (confidential) but here is the html code:
<OBJECT classid="clsid:8AD9C840-044E-11D1-B3E9-00805F499D93" width="600" height="80" align="middle">
<PARAM NAME="cache_archive" VALUE="prestaties.jar">
<PARAM NAME="cache_option" VALUE="Plugin">
<PARAM NAME="cache_version" VALUE="1.4.2.1">
<PARAM NAME="code" VALUE="be.vdab.cvsesf.applet.prestaties.PrestatiesApplet">
     <PARAM NAME="codebase" VALUE="/lib">
     <PARAM NAME="type" VALUE="application/x-java-applet;version=1.3">
     <PARAM NAME="scriptable" VALUE="true">
     <PARAM NAME="windowId" VALUE="185498422412000">
     <PARAM NAME="cursusId" VALUE="23178">
     <PARAM NAME="opleiding" VALUE="boetseren">
     <PARAM NAME="organisator" VALUE="TESTOE Omschrijving">
     <PARAM NAME="locatie" VALUE="TESTDOSSIER HELKPDESK / 0">
     <PARAM NAME="instructeur" VALUE="TESTDOSSIER HELKPDESK / 0">
     <PARAM NAME="WebLogicSession" VALUE="1">
<COMMENT>
<EMBED type="application/x-java-applet;version=1.3" width="600" height="80" align="middle"code="be.vdab.cvsesf.applet.prestaties.PrestatiesApplet"codebase="/lib"pluginspage="cvsesf/plugin.jsp"cache_option="Plugin" cache_version="1.4.2.1" cache_archive="prestaties.jar" windowId = "185498422412000"cursusId = "23178"opleiding="boetseren" organisator="TESTOE Omschrijving" locatie="TESTDOSSIER HELKPDESK / 0" instructeur="TESTDOSSIER HELKPDESK / 0"WebLogicSession="1">
<NOEMBED>
</COMMENT>
          <html>
               <head>
                    <title>Java plugin download</title>
                    <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
                    <link rel="stylesheet" href="../includes/vdabstyle.css">
               </head>
               <body bgcolor="#FFFFFF">
               <TABLE width="600" border="0" cellpadding="1" cellspacing="0">
                    <tr>
                         <td>
                              <h1 align="right"><b><font face="Verdana, Arial, Helvetica, sans-serif">Java plugin</font></b></h1>
                              <P><B>Voor het invullen van prestaties en vergoedingen heeft u de JRE 1.3 Java Plugin nodig: deze staat op de CD-ROM die u normaal gezien van de VDAB gekregen heeft.<br><br>
                              Ofwel kan u de plugin hier zelf downloaden (<U>opgelet:</U> bestand is 8 MB groot).<br><br>
                         U kan het VDAB callcenter contacteren om een CD-ROM aan te vragen of om problemen te melden. Het nummer vindt u onderaan het scherm.</B></p>
                         </td>
                    </TR>
               </table>
               </body>
          </html>
     </NOEMBED>
</EMBED>
</OBJECT>
Hope this helps.
Luk

Simply signing a *.jar file make applet able to read Client PC?

If I simply sign my jar file, which is supposed to open a JFileChooser, and make a default web page that loads the jar as an applet supposed to grant all permisions? I tried this, and the applet pops up the "grant permisions". However the JFileChooser won't pop up?
what if I put a .policy file online in the same directory, could this help or be modified to?

Fractalz wrote:
. . . Now that's the part I have been facing difficulties, cuz I have to include all the classes that the applet is using from other jar
files. And I can not come up with a way to find out all those classes.See the Class-Path: parameter (of a Manifest file) documentation here:
http://java.sun.com/javase/6/docs/technotes/guides/jar/jar.html#Manifest-Overview

How to list files from .jar file in applet?

I have created applet and export all files to .jar file.
I use File.list() method in applet to list files from one directory and that works ok but if I try to do that from web browser it sends exception AccessDenied meaning that File.list() isn't allowed in browser.
I know what's the problem but I don't know how to solve it.
What I want is to read from directory list of files.
Help anyone?

I will post here my code so that can be seen what I want to do:
import java.awt.BorderLayout;
import java.io.BufferedReader;
import java.io.File;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.URLClassLoader;
import java.nio.charset.Charset;
import javax.swing.JApplet;
import javax.swing.JPanel;
import javax.swing.JTextPane;
public class test extends JApplet {
     private static final long serialVersionUID = 1L;
     private JPanel jContentPane = null;
     private JTextPane jTextPane = null;
      * This is the xxx default constructor
     public test() {
          super();
      * This method initializes this
      * @return void
     public void init() {
          this.setSize(449, 317);
          this.setContentPane(getJContentPane());
      * This method initializes jContentPane
      * @return javax.swing.JPanel
     private JPanel getJContentPane() {
          if (jContentPane == null) {
               jContentPane = new JPanel();
               jContentPane.setLayout(new BorderLayout());
               jContentPane.add(getJTextPane(), BorderLayout.CENTER);
          return jContentPane;
      * This method initializes jTextPane
      * @return javax.swing.JTextPane
     private JTextPane getJTextPane() {
          if (jTextPane == null) {
               jTextPane = new JTextPane();
          return jTextPane;
     public void start(){
          File fileDir= new File("somedirectory");
          String strFiles[]= fileDir.list();
          String a="";
          for(int i =0;i<strFiles.length;i++){
               a=a+strFiles;
          this.jTextPane.setText(a);
Method init() is irelevant, it just adds JTextPane in applet.
Method start() is relevant, it runs normaly when started from Eclipse but from browser it sends exception AccessDenied.

Jar file in applet not saved in internet files when using jdk plugin

Hello,
I recently upgarded to jdk1.3.1 and converted our applet and classes to jdk1.3.1 using swing classes. From there, we converted the html file with htmlconverter and diployed this on the web. When a user goes to the web, the system automatically downloads the java plugins and installs them on the clients maching. From there our jar file loads and executes. Our applet runs fine. However, every time our website is accessed, our jar file cookie must be downloaded which is just over 1meg and I know this is not going to fly with our clients.
What needs to be done so the jar file is not downloaded every time, to work like java version 1.x ?
Thanks for your help in advance with this one.
Jay Ford

Hi Jay Ford,
Enable the "Recycle Classloader" in Control Panel-->Java Plug-in1.3.1-->Basic.
The main purpose of this Recycle classloader is it will enable the "javaplugin.classloader.cache.enabled" property to true and it caches the jar files for performance enchancement.
Hope this will help you.
Anil.
Developer Technical Support,
Sun Microsystems Inc,
http://www.sun.com/developers/support

Including multiple jar files to applet

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