Classpath inside a JAR file...

Hi there,
I have recently learned that I cannot use my JDBC driver JAR file from within another JAR file. So now I have two JAR files........my application and associated files in one and the JDBC driver in the other.
This gives me......
gatekeeper.jar
ojdbc14.jar
My problem is, when running the application I get an exception stating that it cannot load the Oracle driver. I'm assuming that this is because it cannot find the JDBC JAR file from within the manifest Class-Path.
My manifest is this: -
Main-Class: GateKeeper
Class-Path: ojdbc14.jar commonfiles images
This includes my commonfiles package (all classes) and my images directory. All these things are included. I'm trying to run the gatekeeper JAR file from the same directory as the JDBC driver JAR file.
I've tried: -
Class-Path: ojdbc14.jar commonfiles images
Class-Path: .\ojdbc14.jar commonfiles images
Class-Path: ..\ojdbc14.jar commonfiles images
None of these things help. Obviously I could just specify the JDBC JAR file when running the application using: -
java -cp ojdbc14.jar -jar gatekeeper.jar
....but I want to have the user just run it without having to know about the classpath.....i.e.
java -jar gatekeeper.jar
DrClap said (and I quote) "In the same directory as your main JAR file is easiest, but at any rate the Class-Path entry in your manifest should include the relative path of the driver jar."
...Isn't the relative path to the JAR file outside the JAR this?
.\ojdbc14.jar
Basically, to recap....from within my JAR application file I want to add to the classpath in the manifest file the JAR file that is outside the application JAR file in the same directory. Helpy?
...I'd offer dukes to you fine folks, but I've only got two left. Since I'm such a newbie, I'm not likely to get any more inthe near future, so I'm saving them for a raining day. :) I hope I can get a little charity without resorting to duke bribary. :)

Hmmm...still not joy. This is the exception I'm getting with the stacktrace.
C:\Java\deployment\GateKeeper\JarFile>C:\j2sdk1.4.2_03\bin\java -jar gatekeeper.jar
java.lang.ClassNotFoundException: oracle.jdbc.driver.OracleDriver
at java.net.URLClassLoader$1.run(URLClassLoader.java:199)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:187)
at java.lang.ClassLoader.loadClass(ClassLoader.java:289)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:274)
at java.lang.ClassLoader.loadClass(ClassLoader.java:235)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:302)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:141)
at commonfiles.OracleDataConnection.<init>(OracleDataConnection.java:26)
at GateKeeperFrame$MainAction.actionPerformed(GateKeeperFrame.java:429)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1786)
at javax.swing.AbstractButton$ForwardActionEvents.actionPerformed(AbstractButton.java:1839)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:420)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:258)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:245)
at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:231)
at java.awt.Component.processMouseEvent(Component.java:5100)
at java.awt.Component.processEvent(Component.java:4897)
at java.awt.Container.processEvent(Container.java:1569)
at java.awt.Component.dispatchEventImpl(Component.java:3615)
at java.awt.Container.dispatchEventImpl(Container.java:1627)
at java.awt.Component.dispatchEvent(Component.java:3477)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:3483
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3198)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3128)
at java.awt.Container.dispatchEventImpl(Container.java:1613)
at java.awt.Window.dispatchEventImpl(Window.java:1606)
at java.awt.Component.dispatchEvent(Component.java:3477)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:456)
at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:201)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:151)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:145)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:137)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:100)
My gatekeeper.jar file contains the following files: -
C:\Java\deployment\GateKeeper\JarFile>jar -tvf gatekeeper.jar
0 Wed May 19 19:06:42 BST 2004 META-INF/
95 Wed May 19 19:06:42 BST 2004 META-INF/MANIFEST.MF
0 Wed May 19 19:06:38 BST 2004 commonfiles/
1185 Mon Apr 26 22:24:30 BST 2004 commonfiles/ErrorDialog.class
1319 Fri Apr 16 10:50:28 BST 2004 commonfiles/ErrorItem.class
1381 Tue Apr 27 19:53:32 BST 2004 commonfiles/ErrorList.class
4207 Mon May 17 12:58:40 BST 2004 commonfiles/FileIO.class
1371 Fri May 14 12:00:38 BST 2004 commonfiles/Input.class
1655 Fri Apr 23 15:13:58 BST 2004 commonfiles/OracleConnectionDetails.class
6653 Fri May 14 14:34:58 BST 2004 commonfiles/OracleDataConnection.class
8612 Fri May 14 15:06:02 BST 2004 commonfiles/Utility.class
0 Mon May 17 19:56:40 BST 2004 images/
116 Wed Apr 21 10:19:50 BST 2004 images/Connect.gif
119 Wed Apr 21 10:19:28 BST 2004 images/Disconnect.gif
117 Wed Apr 21 10:16:24 BST 2004 images/Exit.gif
1024 Mon May 10 14:38:28 BST 2004 GateKeeper.class
186 Wed May 12 11:08:44 BST 2004 GateKeeperFrame$1.class
5300 Mon May 17 14:38:28 BST 2004 GateKeeperFrame$MainAction.class
1740 Fri May 14 15:21:20 BST 2004 GateKeeperFrame$MainButtonListener.class
11034 Mon May 17 11:07:30 BST 2004 GateKeeperFrame.class
898 Wed Apr 28 22:10:56 BST 2004 LoginFrame$DataSource.class
6938 Wed Apr 28 22:10:56 BST 2004 LoginFrame.class
3261 Fri May 14 12:22:28 BST 2004 UsersDataModel.class
My manifest file for gatekeeper.jar file contains this: -
Main-Class: GateKeeper
Class-Path: ojdbc14.jar
And the directory where I'm running the gatekeeper.jar file contains this: -
gatekeeper.jar
ojdbc14.jar
which I'm running using: -
java -jar gatekeeper.jar
Thanks for your help guys. And no, I don't have a newline at the end of the Class-Path entry in the manifest.

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        at java.lang.UNIXProcess.forkAndExec(Native Method)
        at java.lang.UNIXProcess.<init>(UNIXProcess.java:52)
        at java.lang.Runtime.execInternal(Native Method)So then I did some searching and tried something like :
     ClassLoader cl = this.getClass().getClassLoader();
     URL the_file = cl.getResource("myproject/tools/scripts/myscript.sh");
     Process process = Runtime.getRuntime().exec(the_file);
     int exitVal = process.waitFor();but i get this error:
cannot resolve symbol
symbol : method exec (java.net.URL)
location: class java.lang.Runtime
     Process process = Runtime.getRuntime().exec(the_file);So is that the right way i should be doing this? Should i convert the URL (the_file)
to something else before passing to exec()?
Any hints/help/suggestions would be greatly appreciated.
Thanks.

The trouble with your first attempt might be that your relative path to the shell script is not relative to where you think it is. You could try again with an absolute path to the script as a simple test. Assuming that works you can try a more permanent solution -- perhaps a startup script for the Java app that defines a base path or a Properties file.
You are exactly right about the problem with your second try. The exec method in all its forms expects a String as the first argument, so the URL is not going to help much, assuming that the URL is in fact non-null.

Extracting and updating files inside a JAR file... from my code

Hi.
I need some help in the following:
from my code, I need to search a JAR file, open it, unzipped it, then I need to search a xml and property files inside the JAR, after that I need to modify the files and finally, my code has to save the changes and update the JAR file. All that must be from my java code.
How can I do that? I am trying to use Runtime.getRunTime().exec().... but I am not sure that it works. Besides, I don�t know what command to include in the exec() method. Is there any way to do that?
Thanks

The normal reason I see for this requirement is that people want to update a properties or data file. The approach I use it that I first look for the data file in a well defined location and if I find it I use it and update it as required. If I don't fine it I create it base on a template file read from the jar file using getResourceAsSrream().
In this way I never have to update the jar file.

Classpath inside a JAR file...

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