Problem with executable jar file

Hi,
I wrote a simple little xml based app in eclipse, it had xalan and xerces in build path. I created an executuable jar that ran fine on my machine; I was able to move it to different directories and launch it successfully, but when I put the jar file on a network directory and asked a coworker to try running it, they got a message that said it couldn't find the main class.
how do you deal with that?
thanks,
bp

they got a message that said it couldn't find the main class.
Are you sure?
If you are sure then none of the other responses will help.
That error suggests one of the following
1. The jar you moved is not the jar that you are running.
2. Your co-workers did not execute it correctly.
3. You do not have an executable jar (and you are not testing it correctly on your box.)
How exectly did they run it?
The standard double click will give an error about "Main-Class" with that specific text when you attempt to run a jar that is not in fact an executable jar.
That error is NOT the same as the standard class not found error.

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thank you for the reply.
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I believe I have a problem with my Jar file build.

Hi, there. New to Java/JavaFX. Testing language features. Operating System: Windows 7; java version 1.7.0_03; javafx version 2.0.3.
This is a simple test with 2 classes: Test1.class resides in base directory "MyJavaFX"; TextFileLoader.class resides in sub-directory "inout" of "MyJavaFX"(i.e. MyJavaFX\inout).
Test1.class has an import statement "import inout.TextFileLoader;" TextFileLoader.class has a package statement "package inout;"
Both classes compile without problems and jar file is created using Ant tasks.
Within "MyJavaFX" as my current directory, When running Application Test1 (java -jar Test1.jar)
getting error "ClassNotFoundException: inout.TextFileLoader".
I believe it has to do with how Test1.jar file is built. I believe line 4 should say "inout/TextFileLoader.class"
instead of just the simple class name but I can't get my Ant task to set it up that way.
This is "Test1.jar":
META-INF/
META-INF/MANIFEST.MF
Test1.class
TextFileLoader.class
com/
com/javafx/
com/javafx/main/
com/javafx/main/Main$1.class
com/javafx/main/Main.class
com/javafx/main/NoJavaFXFallback.class
This is my "build.xml" file:
<project name="JavaFxTest" default="default" basedir="."
     xmlns:fx="javafx:com.sun.javafx.tools.ant">
<target name="default">
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     <fx:resources id="appRes">
     <fx:fileset dir="C:/Program Files/Oracle/JavaFX 2.0 Runtime/lib"/>
     </fx:resources>
     <fx:jar destfile="C:/MyjavaFX/Test1.jar">
     <fx:application refid="Test1"/>
     <fx:resources refid="appRes"/>
     <fileset dir="." includes="Test1.class"/>
     <fileset dir="inout" includes="TextFileLoader.class"/>
     </fx:jar>
</target>
</project>

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Problems with signed JAR files in JWS/JRE6 environment.

Hello All,
I'm encountering a problem running our desktop application as a Java Web Start deployment in a JRE 6 environment. There were never any problems when running the same application as a JWS deployment in JRE 1.4, or 5, environments. There are also currently no problems in a JRE 6 environment when running the application as a standard desktop application.
The problem which I am having has nothing to do with launching the application. But for good measure, I verified the JNLP file with JaNeLA. A couple things we out of order, which I addressed to make JaNeLA happy, but my problem still persists. Here is my JNLP file (anonymized to protect the innocent):
TS: 2010-10-18 17:04:46
<?xml version="1.0" encoding="UTF-8"?>
<jnlp codebase="$$codebase" href="$$name">
     <information>
          <title>Acme Desktop</title>
          <vendor>Acme Corporation</vendor>
          <homepage href="http://www.acme.com/"/>
          <description>Acme Client for Acme Server</description>
          <description kind="tooltip">Acme Client for Acme Server</description>
          <icon href="desktop.gif"/>
          <offline-allowed/>
     </information>
     <security>
          <all-permissions/>
     </security>
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          <j2se version="1.5+"/>
          <jar href="acmedesktop.jar" download="eager" version="8.00.01.00+"/>
          <jar href="lib/antlr-2.7.2.jar" download="eager" version="8.00.01.00+"/>
          <jar href="lib/backport-util-concurrent.jar" download="eager" version="8.00.01.00+"/>
          <jar href="lib/commons-codec-1.3.jar" download="eager" version="8.00.01.00+"/>
          <jar href="lib/commons-httpclient.jar" download="eager" version="8.00.01.00+"/>
          <jar href="lib/commons-logging.jar" download="eager" version="8.00.01.00+"/>
          <jar href="lib/acmeapi.jar" download="eager" version="8.00.01.00+"/>
          <jar href="lib/HelpJavaDT.jar" download="eager" version="8.00.01.00+"/>
          <jar href="lib/HelpJavaDT_es.jar" download="eager" version="8.00.01.00+"/>
          <jar href="lib/jacorb.jar" download="eager" version="8.00.01.00+"/>
          <jar href="lib/Multivalent.jar" download="eager" version="8.00.01.00+"/>
          <jar href="lib/slf4j-api-1.5.6.jar" download="eager" version="8.00.01.00+"/>
          <jar href="lib/slf4j-jdk14-1.5.6.jar" download="eager" version="8.00.01.00+"/>
          <jar href="lib/snow.jar" download="lazy" version="8.00.01.00+"/>
          <jar href="lib/AcmeTMClient.jar" download="eager" version="8.00.01.00+"/>
          <jar href="lib/xercesImpl.jar" download="eager" version="8.00.01.00+"/>
          <jar href="lib/xml-apis.jar" download="eager" version="8.00.01.00+"/>
          <extension name="installer" href="desktopInstaller.jnlp" />
          <extension name="Java Help" href="help.jnlp"/>
          <property name="java.library.path" value="./lib"/>
          <property name="admin" value="false"/>
          <property name="webstart" value="true"/>
          
     </resources>
     <resources os="Windows">
          <nativelib href="lib/jniWin32.jar" version="8.00.01.00+"/>
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     <application-desc main-class="desktop"/>
</jnlp>-----
When running as a JWS deployment, on JRE 6, the application will be functioning normally for a little while, and then suddenly the following exception is thrown, and the current operation fails because the class in question cannot be accessed:
java.lang.SecurityException: class "acmeapi.communication.CDocImpl"'s signer information does not match signer information of other classes in the same package
     at java.lang.ClassLoader.checkCerts(ClassLoader.java:807)
     at java.lang.ClassLoader.preDefineClass(ClassLoader.java:488)
     at java.lang.ClassLoader.defineClassCond(ClassLoader.java:626)
     at java.lang.ClassLoader.defineClass(ClassLoader.java:616)
     at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141)
     at java.net.URLClassLoader.defineClass(URLClassLoader.java:283)
     at java.net.URLClassLoader.access$000(URLClassLoader.java:58)
     at java.net.URLClassLoader$1.run(URLClassLoader.java:197)
     at java.security.AccessController.doPrivileged(Native Method)
     at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
     at com.sun.jnlp.JNLPClassLoader.findClass(JNLPClassLoader.java:288)
     at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
     at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
     at acmeapi.common.CDoc.getAnnotationsInfo(CDoc.java:493)
     at acmedesktop.communication.CCommunicationManager.privateGetAnnotations(CCommunicationManager.java:1976)
     at acmedesktop.communication.CCommunicationManager.getAnnotations(CCommunicationManager.java:1828)
     at acmedesktop.annotations.CViewAnnotations.getAnnotations(CViewAnnotations.java:826)
     at acmedesktop.annotations.CViewAnnotations.createView(CViewAnnotations.java:583)
     at acmedesktop.annotations.CViewAnnotations.setData(CViewAnnotations.java:736)
     at acmedesktop.annotations.CViewAnnotations.init(CViewAnnotations.java:205)
     at acmedesktop.hitspanel.CHitsPanel.viewAnnotations(CHitsPanel.java:281)
     at acmedesktop.hitspanel.CHitsTab$3.mousePressed(CHitsTab.java:316)
     at java.awt.AWTEventMulticaster.mousePressed(AWTEventMulticaster.java:263)
     at java.awt.Component.processMouseEvent(Component.java:6260)
     at javax.swing.JComponent.processMouseEvent(JComponent.java:3267)
     at java.awt.Component.processEvent(Component.java:6028)
     at java.awt.Container.processEvent(Container.java:2041)
     at java.awt.Component.dispatchEventImpl(Component.java:4630)
     at java.awt.Container.dispatchEventImpl(Container.java:2099)
     at java.awt.Component.dispatchEvent(Component.java:4460)
     at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4574)
     at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4235)
     at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4168)
     at java.awt.Container.dispatchEventImpl(Container.java:2085)
     at java.awt.Window.dispatchEventImpl(Window.java:2478)
     at java.awt.Component.dispatchEvent(Component.java:4460)
     at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
     at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
     at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
     at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
     at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
     at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
     at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)-----
The classes of our desktop product are contained within the 'acmedesktop' and 'acmeapi' packages. It requires access to the hard drive of the workstation, and therefore, all jar files included with the application are signed using the following ANT task when compiled:
<signjar keystore="resources/codesigning/keystore.pfx" storetype="pkcs12" storepass="myPassword" alias="myAlias">
     <fileset dir="${jws_dist}/app" includes="*.jar"/>
     <fileset dir="${jws_dist}/app/lib" includes="*.jar" excludes="jhall__V${dt_version}.jar"/>
</signjar>-----
Therefore, all classes, within all jar files, are signed with the same certificate (with the exception of the JavaHelp libraries, which are already signed by Sun - but the class in question attempting to be loaded here is not contained within the JavaHelp jar file anyway). So, the point being, that the exception message stating that the "signer information of the acmeapi.communication.CDocImpl class doesn't match the signer information of other classes in the same package", is simply not correct. All classes within that jar file were signed using the same certificate.
I downloaded the JRE 6 source from dev.java.net and picked through this issue with a debugger. The ClassLoader.checkCerts() method compares the certificate used to sign the current class which is attempting to be loaded, with the certificates which signed all other previously loaded classes within the same package. If they don't match, the exception above is thrown. What is causing the issue is when the checkCerts() method attempts to get the certificates which signed the currently loading class, null is returned. And obviously, comparing null, with an array of the certificates which signed the previously loaded classes, isn't going to match; therefore this exception is thrown.
The checkCerts() method gets the certificates of the currently loading class by calling the java.security.CodeSource.getCertificates() method. Tracing deeper in the debugger, the CodeSource object ultimately gets the certificates from the 'signersRef' member variable of the com.sun.deploy.cache.CachedJarFile class. signerRef is a SoftReference object and can therefore be garbage collected at some point. If it has already been garbage collected, the CachedJarFile class will attempt to retrieve it again from the loaded cache entry by calling com.sun.deploy.cache.MemoryCache.getLoadedResource().
The MemoryCache class maintains the cache entries to the jar files as MemoryCache.CachedResourceReference objects, which subclass WeakReference, and therefore these objects can be garbage collected as well. If the cache entries have also been garbage collected, this leaves the CachedJarFile class with no ability to repopulate the CachedJarFile.signerRef object. Therefore it is completely out of luck getting the certificates which signed the currently loading class, which ultimately causes the above exception.
When the com.sun.deploy.cache.Cache class attempts to retrieve a cache entry using its getCacheEntry() method, it will attempt to get the entry from the MemoryCache class, if null is returned, it will recreate the cache entry and add it back to the MemoryCache. In contrast, when the CachedJarFile class attempts to get a cache entry from the MemoryCache class, if null is returned, it just gives up.
(from com.sun.deploy.cache.CachedJarFile:244)
private CacheEntry getCacheEntry() {
     /* if it was not created by Cache do not search for entry */
     if (resourceURL == null)
          return null;
     CacheEntry ce = (CacheEntry) MemoryCache.getLoadedResource(resourceURL);
     if (ce == null) {
          //This should not happen because CacheEntry should not get collected
          // before CachedJarFile is collected.
          Trace.println("Missing CacheEntry for " + resourceURL + "\n" + ce,
               TraceLevel.CACHE);
     return ce;
When debugging, code execution falls within the code block with the comment stating "This should not happen...", but it is happening in my case.
On an interesting side note, using the jvisualvm.exe tool included with JDK 6, I was able to tell that it seems as though these objects are collected the first time that the JVM allocates more heap space, and then the issue will occur. If I set the initial heap size very large (using -Xms) this issue won't occur at all. But that is kind of a bad solution which I would rather not do, but it is interesting to note for the sake of troubleshooting this issue. The max heap size (-Xmx) is plenty big enough, so the issue is not that we are running out of memory here.
Does anyone have any insight as to what could be causing this? I've searched, and found a couple threads with similar problems but with no clear solutions. It is not just one workstation either, it happens everywhere I deploy the app as a Java Web Start application in a JRE 6 environment. I have been using version 1.6.0_18 on XP, but it seems to happen on any update version of 1.6. Is the fact that the CachedJarFile class doesn't attempt to reload the resource when it can't retrieve it from MemoryCache a bug? I've dug as deep as I can on this and I'm at wits end, does anybody have any ideas?
Thank you
Jake
Edited by: jkc532 on Nov 12, 2010 10:35 AM

jkc532 wrote:
.. Is the fact that the CachedJarFile class doesn't attempt to reload the resource when it can't retrieve it from MemoryCache a bug? From your comprehensive investigation and report, it seems so to me.
..I've dug as deep as I can on this and I'm at wits end, does anybody have any ideas?Just after read the summary I was tired, so I have some understanding of the effort you have already invested in this (the 'wits' you have already spent). I think you should raise a bug report and seek Oracle's response.

Problem with Executable JAR

Hi,
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Main-Class:package-name.MainClass
When I execute my jar file, I get an error, that looks like this:
Failed to load Main-Class manifest attribute from [jar-file].
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Thanks in advance,
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Problems with my jar file

Here is another jar question, which you have probably heard about a million times so far. I have created the following java program, which I compile and run from c:\j2sdk1.4.2\bin directory:
public class Test2{
public Test2() {}
public static void main(String[] args){
System.out.println("It runs");
Both the Test2.java and Test2.class are in the ..\bin directory.
I create my Manifest.mf file as:
Main-Class: Test2
Then I follow the instructions from the Java API to create my jar file:
jar cmvf Manifest.mf Test2.jar Test2.class
I get the following message on the command prompt:
added Manifest
adding Test2.class(in = 411)(out = 283)(deflated 31%)
The Test2.jar file is placed in the ...\bin directory
I then double click on the Test2.jar icon and get the following error
message from the Java Virtual Machine Launcher:
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Similar error message when I type "java -jar Test2.jar" on the command prompt.
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vxc

I know. I followed the instructions, but still didn't work. See error message from Java Virtual Machine in previous message of this thread.
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Problem in loading applet from non executable jar file

hello ,
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You have to download what you have to download. You
probably can't easily share images between 2 separate
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other applet via a method that can be known once you
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on the top is ::
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Hi all,
I Trying to deploy a simple J2SE app by making an Executable JAR File, however I don'r understand how to add a valid value to the Main Class field.
I followed the following description within Jdev, after creating a Deployment Profile:
Deploying an Executable JAR File
You can make your simple archive or J2EE Client Module into an executable JAR file that you can launch with the java command.
To deploy an executable JAR file:
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5) In the Main Class field, enter the fully qualified name of the application class that is to be invoked.
7) Click OK.
8) Launch the executable JAR file from the command line:
java -jar myapp.jar
where myapp represents your JAR file name.
Like I said it's in 5) I'm doing something worng
My deploy-file (PlotPrint.deploy) looks the following:
<?xml version = '1.0' encoding = 'windows-1252'?>
<client-deployment xmlns="http://xmlns.oracle.com/jdeveloper/903/deploy/j2ee-client-jar" nselem="client-deployment" class="oracle.jdeveloper.deploy.jar.ClientProfile">
<archiveOptions>
<additionalManifests/>
<compressed>false</compressed>
<hasManifest>true</hasManifest>
<mainClass>PlotPrintClient</mainClass>
</archiveOptions>
<archiveTargetPlatform/>
<cdaSettings>
<additionalArchives/>
<afterFilters/>
<beforeFilters/>
<duringFilters/>
<selectedArchives>
<archives>
<Item protocol="jar" path="file:/C:/Oracle9i_Jdev/jdevbin/jdbc/lib/classes12.jar!/"/>
<Item protocol="jar" path="file:/C:/Oracle9i_Jdev/jdevbin/jdbc/lib/nls_charset12.jar!/"/>
<Item protocol="jar" path="file:/C:/Oracle9i_Jdev/jdevbin/jdev/lib/jdev-rt.jar!/"/>
<Item protocol="jar" path="file:/C:/Oracle9i_Jdev/jdevbin/soap/lib/soap.jar!/"/>
<Item protocol="jar" path="file:/C:/Oracle9i_Jdev/jdevbin/lib/xmlparserv2.jar!/"/>
<Item protocol="jar" path="file:/C:/Oracle9i_Jdev/jdevbin/jlib/javax-ssl-1_2.jar!/"/>
<Item protocol="jar" path="file:/C:/Oracle9i_Jdev/jdevbin/jlib/jssl-1_2.jar!/"/>
<Item protocol="jar" path="file:/C:/Oracle9i_Jdev/jdevbin/j2ee/home/lib/activation.jar!/"/>
<Item protocol="jar" path="file:/C:/Oracle9i_Jdev/jdevbin/j2ee/home/lib/mail.jar!/"/>
<Item protocol="jar" path="file:/C:/Oracle9i_Jdev/jdevbin/j2ee/home/lib/http_client.jar!/"/>
<Item protocol="jar" path="file:/C:/Oracle9i_Jdev/jdevbin/webservices/lib/wsdl.jar!/"/>
<Item protocol="jar" path="file:/C:/Oracle9i_Jdev/jdevbin/lib/xmlparserv2.jar!/"/>
<Item protocol="jar" path="file:/C:/Oracle9i_Jdev/jdevbin/lib/xmlcomp.jar!/"/>
</archives>
<selectionMode>0</selectionMode>
</selectedArchives>
</cdaSettings>
<defaultConnection class="java.lang.String"/>
<deployClientMaxHeapSize/>
<earURL path="deploy/PlotPrint.ear"/>
<enterpriseAppName/>
<jarURL path="deploy/PlotPrint.jar"/>
<profileDeps/>
<properties/>
<selectedProjectFiles>
<autoInclude>true</autoInclude>
<deploySourceAs>0</deploySourceAs>
<files class="[Ljava.net.URL;"/>
<selectionFilters/>
</selectedProjectFiles>
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I using Oracle9i Jdev, but have also tried it un the new Jdev 10g version, but the same problem everytime:
Error message: Could not find the main class: program will exit.
Please help I really need this to work
Message was edited by:
MHCI
Message was edited by:
MHCI

Yes that was the problem so I have changed the element mainClass to
<mainClass>xxPlotPrint.MHCI.PlotPrintClient</mainClass>
But now another probem has occured, since I get the following error when run the jar-file (When I run the app from within Jdev there are no warnings or errors).
----Batch-file-----
@echo off
java -jar PlotPrint.jar
echo Test Plot and Print Batch-file!
pause
---- out to cmd ----
Exception in thread "Thread-0" java.lang.ClassCastException: com.sun.org.apache.xerces.internal.dom.DeferredDocumentImpl
at xxPlotPrint.MHCI.NNE35_worker.run(NNE35_worker.java:42)
at java.lang.Thread.run(Unknown Source)
Exception in thread "Thread-2" java.lang.ClassCastException: com.sun.org.apache.xerces.internal.dom.DeferredDocumentImpl
at xxPlotPrint.MHCI.OCEJobDB_worker.run(OCEJobDB_worker.java:41)
at java.lang.Thread.run(Unknown Source)
Exception in thread "Thread-1" java.lang.ClassCastException: com.sun.org.apache.xerces.internal.dom.DeferredDocumentImpl
at xxPlotPrint.MHCI.NNE27_worker.run(NNE27_worker.java:42)
at java.lang.Thread.run(Unknown Source)
It's the same problem in all three exceptions (the exactly the same code), however I was a bit to quick this is the line (the line before I process the xml doc :-)
import org.w3c.dom.Element;
responseData = new Vector();
responseData = test_NNE35_SOAP.getXSDdoc();
Element elements = ( (org.w3c.dom.Element)responseData.elementAt(0) ); (line 42)
Please help I don't understad why I receive this exception, since I included the xmlparserv2.jar file, and don't even have a workaround :-(

Executable Jar files with Oracle drivers and Oracle classes

I have a program which works perfectly that is used to do file
maintenace on an oracle table. Now I am ready to make this into
an executable jar file. I know how to do this, but my problem is
now how do I get the Oracle classes into my jar? I think they
are all in classes12.zip, but just adding classes12.zip into the
jar doesnt work. I still get an error when running the program
that says it can't find oracle.jdbc.drivers.oracledriver.
You can use the jar command to add all classes in a directory,
but this doesnt work either.
Has anyone out there ever done this? Please help if you know how
to do this. How do you put the oracle classes into you
executable jar file?
Wah!!!

Me again. I forgot to mention that I am only using Java. We
don't have Oracle forms or jdeveloper. This is just straight
java. Everything worked until I tried to executable jar creation.

Executable JAR file: Could not find the main class.

Hello,
I have a problem with making an executable JAR file.
I have written a JAVA program that consists of five different classes of which User.java is the main class and I have saved a text document with Main-Class: User and a blank line after that.
If I try:
jar cmf MainClass.txt User.jar User.class Beheerder.class Operator.class Manager.class MaakVisueelSchema.class
it makes a executable jar file which actually works! :)
But when the Operator class trys to open the MaakVisueelSchema class the screen stays blank.
I can run MaakVisueelSchema with java MaakVisueelSchema.
So I tried to make an executable JAR that consists only of MaakVisueelSchema, the same way as I did for User:
Main-Class: MaakVisueelSchema
jar cmf MainClass.txt MaakVisueelSchema.jar MaakVisueelSchema.class
Then I get the error message:
Could not find the main class. Program will exit.
from the Java Virtual Machine Launcher.
The big difference between MaakVisueelSchema and the other classes is that MaakVisueelSchema contains a PaintComponent method and an ComponentListener. Is it possible that one of those creates the error?
Can anyone help me with this problem?
Thanks in advance!
Bye!

Yes,
I tried:
jar xvf MaakVisueelSchema.jar
and it returns:
META-INF/
META-INF/MANIFEST.MF
MaakVisueelSchema.classN/G. You need to manually create a manifest file in a text editor, have it point to your main class, and enter it in your jar command as an argument.

Could not find the main class error with executable jar

Hello,
I have troubles creating an executable jar file and I ran out of ideas how to solve it so I would appreciate some help.
I have created a jar file with the export function in eclipse
the Manifest.MF file contains:
Manifest-Version: 1.0
Main-Class: view.AppTennisViewI tried starting the file with a batch file which contains following code:
@echo off
javaw -classpath c:\TennisHSQLDB_GC2\tennisApp.jar
@start javaw -jar tennisApp.jar
exitthe batch file and the jar are both located in c:\TennisHSQLDB_GC2.
When i try command line I get the same result.
I also tried alternate statements such as SET CLASSPATH iso javaw -classpath and including the classpath in the manifest file but no luck. It keeps given me the error: could not find the main class. program will exit
Anyone any suggestions for my problem?

nevermind, found it.
classpath in manifest was incorrect

Problem with executable jar file

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