Error when duble click on executable jar file

when duble click on jar file I get error message " Could not find main class . program will exit" , I am using jre 1.5_04,
when I runnig from command - java -jar ./myJar.jar --> works fine.
when I runnig from command - java -cp ./classes myUi --> works fine.
I get the error just when I try to execute the jar by duble click.
it some one knows what can be the problem??
Thanks
Nir

The message bar says " The following disk image couldn't be opened"... As for reason... "Not recognized"

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Error trying to run an executable Jar file

Hi,
I know a million people have asked this before. In the past 5 hours I have waded thru a dozen questions-answers-FAQs that were no help. So if anyone is willing to help a stupid person her is my problem:
I developed a java program using the eclipse ide and it runs fine from within that ide.
I packaged it into a Jar file, created a manifest file per the instructions.
But when I double click on the jar file I get the following error from the Java Virtual Machine Loader;
"Could not find main class. Program will exit."
My Manifest file has the following text:
Manifest-Version: 1.0
Class-Path: swt.jar
Main-Class: .graphicalUserInterface.AppStandAlone
<blank line>
the class AppStandAlone has the method "public static void main(String[] args) "
it is in a package called "graphicalUserInterface".
Any help anyone can give me would be greatly appreciated.

Another 3 hours spent trying to run this java application in a Jar file.
I identified that I did not have all class paths specified. So I tried to enter them in the "Class-Path:" line of the manifest file. But, according to the java tutorial, the syntax in a manifest file for classpaths is a space SEPARATING each path name. I have a space IN the path name and java is not understanding the paths correctly. For instance, I have a classpath c:\Progran Files\Java\etc... and java interprets this to be a classpath c:\Progran with Files\Java\etc as the program I want to run.
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Hi,
U have to import these statements,
import com.sap.security.api.IUser;
import com.sap.security.api.UMException;
import com.sap.security.api.umap.IUserMappingData;
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I am getting system tray icon when i execute jar file.

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Karthik_Java wrote:
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Deploying Java Desktop App using executable JAR files

Hi there.
Today I am very optimistic about java. I am a beginner, and I had tried (in my few free time) to understand how to deploy java desktop apps.
I am using the lattest NetBeans IDE to do the programming and it is very very fast and optimized.
Going to the point, I tried some time ago to deploy an application (made with this IDE) using JAR files, but even though the application run well on my IDE, when I packed it, it rised an error saying that
java.lang.NoClassDefFoundError: org/netbeans/lib/awtextra/AbsoluteLayout
I was using an absolute layout on my JFrame forms and this AbsoluteLayout is provided by netbeans and not by the normal SDK.
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C:\netbeans\modules\ext\AbsoluteLayout.jar
So I mounted the Jar file in my File Systems and then added the contents of the file to myApp.Jar file.
I used the automated Jar Recipe Packaging feature of netbeans, that is why I needed to mount the AbsoluteLayout.jar file into my file systems.
Now it runs fine by just right clicking the MyApp.jar file from Windows Explorer.
In a next reply to this topic I will include some sample code so that anybody requiring to do such implementation can take this for help.
Regards!
JN

Well,
I will take some time here to show the basic source code and procedure to create a desktop application, pack it up in a Jar file for deployment, add other classes or jars to the deployment jar file and finally open the jar file as an executable. This applies for either windows and linux environments.
Take in count i am using Netbeans IDE 3.x (3.5)
First I open the IDE and create a new project called MyDesktopApp. This is done by going to the menu Project / Project Manager. Then click on the New button and specify the project name and click on OK.
At this point, the Filesystems tab in the project explorer is empty. So I mount a directory to store myDesktopApp in it. I selected c:\MyDesktopApp but you can select any name you want.
To mount the directory you follow these steps:
1. Right-click on File Systems
2. From the contextual menu select Mount > Local Directory
3. In the filechooser window, you just browse it and SELECT the directory to mount. Be aware that you can even create the directory on this window. Do not enter (double-click) into the directory you want to mount, just select it and click on finish...
4.Then the directory entry appears under the filesystems node of the project explorer.
Now you have to create your application. You can either create a package (special configured and tracked directory) or you can create the clases directly inside the directory. For tidy project, I will create the package.
To create the package follow these instructions:
1. Right-click on the mounted directory and from the contextual menu select New > Java Package
2. In the New Wizard - Java Package window, type the package name and click on finish. I use the "MyDesktopApp" as package name.
OK. Now the package is created under the mounted directory. Now we have to create the Main Class. In this case I will use a JFRAME as the main class but you can create any class you want.
To create the JFRAME as main class follow these steps:
1. Right click on the java package you just created and select New>JFRAME from the contextual menu. If you do not see the JFRAME option on the NEW sub menu you will have to select the All Templates option. I explain the All Templates option now on, it will be easier to use the JFRAME if available. Once you use JFRAME with the all templates then the JFRAME will show up in further NEW usage.
2. So finally we used the All Templates, and you select the Java GUI Forms > JFRAME form option and click on NEXT.
3. Give it a name. (I used MyDesktopAppFrm) and click on finish. Be aware you can set advanced options by clicking on next. But for the purposes of this topic we will use default options so click on FINISH
4. A new JFRAME form appears inside your package. Right click on the form and select Set layout > Absolute Layout.
5. Add some controls and code. I added a label and a button. And coded the ActionPerformed event of the button to say hello! on the label. this is up to you. The code just looks as follows:
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
// Add your handling code here:
jLabel1.setText("Hello folks!");
6. Compile and execute the form.
Let's say this is our Desktop Application. Now We will pack it in a Jar in two steps...
A. Create a JAR file (Recipe)
1. Right-click on your package and select New > All Tempaltes (Long Route) You can also select New > JAR Recipe if available.
2. On the New Wizard Window, choose the JAR ARchives > JAR Recipe template and click on NEXT
3. I used MyDesktopApp as the file name and Defaults and then click on Next.
4. Specify the JAR Contents. Select the Package (not the mounted folder) from the mounted file system and click on add and then click on NEXT twice...
5. On the JAR Manifest window, click on GENERATE
6. Edit the manifest in the window to add the following code:
Main-Class: MyDesktopApp.MyDesktopAppFrm
7. Ensure the Main-Class definition is the same as your java package and JFRAME name. Click on FINISH
8. At this point we have a jar file in your project directory but this file wont run because it is missing some Netbeans clases that we will add in the next set of steps... Just to check, compile the file (right click on the JAR file and compile) and try to execute. It must compile but must not execute.(well if it executes you are done. It may execute if you did not set the lay out of the form as AbsoluteLayout)
B. Add the AbsoluteLayOut to the JAR
1. Right click on File Systems and select Mount > Archive Files
2. Look for your netbeans installation folder and select the following file:
.../netbeans/modules/ext/AbsoluteLayout.jar
3. Click on finish
4. Now the JAR File is mounted in the file systems.
5. Right-click on your MyDesktopApp.JAR file and select properties.
6. Look for the contents property click once on it and then on its elipsis button [...]
7. From the FileSystems box in the Contents window, select the AbsoluteLayOut file and click on Add
8. Then the system asks you if you are sure. Of course you are so click OK. (If not sure, just read the message text and click OK...:-))
9. Click on OK
10. Compile your JAR Recipe (right click on it and Compile)
11. Now you must be able to run the file by right clicking it and EXECUTE.
12. Also you must be able to run the file by double clicking the file from a Windows Explorer. You may receive a message asking to select the program to run the file with. You must browse and select the Javaw.exe file in the bin directory of your Java RUn Time installation. This is typically located at C:\j2sdk1.4.0_01\jre\bin or something like that. Use the File-Search feature of window to locate the JAVAW.exe file if needed.
I hope this long explanation helps somebody to deploy Java Desktop applications. Please reply the message if it helps you just to know it was useful.
Thanks for your time....
JN

Executing jar files

Hey
I v made a jar file and m able to execute it through the command prompt by using the command " java -jar myapp.jar ". But when I double-click the jar file, m geeting a JVM error - Could not find the main class. I hv checked the Manifest.mf file, it seems alright. Can somebody plzzzzzz help me sort this out. M really stuck.

johny2009 wrote:
Hey
I v made a jar file and m able to execute it through the command prompt by using the command " java -jar myapp.jar ". But when I double-click the jar file, m geeting a JVM error - Could not find the main class. I hv checked the Manifest.mf file, it seems alright. Can somebody plzzzzzz help me sort this out. M really stuck.I would say that if it works from the command line but not when double clicking, then your Windows file association for .jar files is not correct. You set that by opening a Windows folder view, finding and selecting a menu with folder options, File Types tab, select JAR, click on Advanced and edit the open action. On my Windows 2000 PC, the "Application to form action" is
"C:\Program Files\Java\jre1.6.0_02\bin\javaw.exe" -jar "%1" %*

[b]Simple Deploy problem- making an Executable JAR File ...PLEASE HELP [/b]

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:
1) Select and right-click the simple archive or client icon in the Navigator to display the context menu.
2) Choose Properties.
3) Click JAR Options in the tree.
4) Select Include Manifest File (META-INF/MANIFEST.MF).
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
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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!/"/>
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<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>
</client-deployment>
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 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.

Associating executable Jar files w/ appropriate program

Hi, I'm kinda new to java but this question is more OS related I think. I made a GUI program that reads / writes files and does some other stuff, I compiled it, then made it into an Executable JAR file. I put the file on my dektop w/ the required resource file (contains the read files) and then I double-click it and lo and behold Win-Ace(R) popps up. I right-clicked on the executable jar file, associated it with JAVAW, double-clicked again and it worked. So i guess my question is, is there a way that it will automatically associate itself with the right program so when I give this program to other people, they won't have to associate it the same way?
Anyhelp would be greatly appriciated!

No, becourse even if java could do that it would make sence becourse to run the jar it must be associated with javaw.
But you could try to create a .reg file (registry file) that associate jar with javaw, when somebody runs the reg file it associate jar with javaw.
But I think you should make different reg files for different windows versions (not sure about that).
I don't have experience with how to write reg files but you just google.
But I should try it out on your own windows, you could install windows on another partion and try it out on that one (first make a image with norton gost or something so if something goes wrong you can fastly get back to the old state).
But you can also export your registry to a file so you can put the old registry back if somethings goes wrong.
Use these tips on you own risk!!!

Error when duble click on executable jar file

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