Manifest file and main class location problem

my main class is in not in the root of the jar file, it is down a package tree structure, and whenever I run the jar it says
Failed to load Main-Class manifest attribute from
xxxxx.jar
How do I specify the location of the main class? like this??
Main-Class: com/Utilities/visual/Model
thanks for your help.

It should be
Main-Class: com.Utilities.visual.Model
and make sure your manifest file has an empty line at the end of your file (i.e. press enter after the last line in your manifest line).

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Jar files and Main-Class headers

I think I already posted this, but I can't find it on the forum...my apologies if it's already there and I'm just blind or something.
I have a bunch of classes in the directory C:/chess/server , and I want to make a .jar file with these classes. The class with the main method is server/ChessServer.class . From which folder should I create a jar file with these classes, and how exactly should I label the Main-Class header in the manifest file? Also, what's the purpose of the "Name:" header?
I know the topic is posted a lot, but I've tried many different ways and I can't get this to work. I get many variations on the "NoClassDefFoundError". I know the classes themselves are fine because they work perfectly when they're not in a .jar file.
Thanks in advance!

I tried that, and it still doesn't work. I used the command C:\chess> jar 0cmf manifest.mf MuChess.jar server . Manifest.mf is:
Main-Class: server.ChessServer
Sealed: true
When I try to run it with C:\chess> java -jar MuChess.jar , I get:
Exception in thread "main" java.lang.NoClassDefFoundError: server/ChessServer (w
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at java.lang.ClassLoader.defineClass0(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:502)
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at java.net.URLClassLoader$1.run(URLClassLoader.java:193)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:186)
at java.lang.ClassLoader.loadClass(ClassLoader.java:299)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:265)
at java.lang.ClassLoader.loadClass(ClassLoader.java:255)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:315)
When I unpack the file with my excraction utility, I get get two folders: One is "server", and contains all the files it should--including ChessServer--, and the other is "META-INF" and contains the following MANIFEST.MF file:
Manifest-Version: 1.0
Sealed: true
Created-By: 1.4.1_03 (Sun Microsystems Inc.)
Main-Class: server.ChessServer
Any ideas?

Jar files and Main-Class attribute

Sorry, I know there are other topics regarding this argument but none of them helped me solving my problem.
I've tried a thousand time in every possible way, but I still can't run my application from a jar file. I've got a package called client, whose main class is called Client. The package contains a sub-package called Icons. I've put everything into a jar file and added this manifest:
Manifest version: 1.0
Name: client/
Sealed: True
Main-Class: client.Client
But it won't work. I've tried to erase the Sealed part, I've tried "Main-Class: Client" and also "client/Client", I've tried putting into the jar the client directory and I've tried omitting it, but the answer is always the same:
Failed to load main-class header etc.
Can anyone help me? Please, I'm almost desperate!
Thanks

Here's the verbose-mode description of what I did.
jar -cfv client.jar clientaggiunto manifesto
aggiunta in corso di: client/(in = 0) (out= 0)(archiviato 0%)
aggiunta in corso di: client/.nbattrs(in = 767) (out= 310)(compresso 59%)
aggiunta in corso di: client/Client.class(in = 533) (out= 340)(compresso 36%)
aggiunta in corso di: client/Client.java(in = 288) (out= 140)(compresso 51%)
aggiunta in corso di: client/ClientForm$1.class(in = 691) (out= 383)(compresso 44%)
aggiunta in corso di: client/ClientForm$10.class(in = 678) (out= 380)(compresso 43%)
aggiunta in corso di: client/ClientForm$11.class(in = 689) (out= 385)(compresso 44%)
aggiunta in corso di: client/ClientForm$2.class(in = 686) (out= 379)(compresso 44%)
aggiunta in corso di: client/ClientForm$3.class(in = 686) (out= 381)(compresso 44%)
aggiunta in corso di: client/ClientForm$4.class(in = 686) (out= 380)(compresso 44%)
aggiunta in corso di: client/ClientForm$5.class(in = 686) (out= 383)(compresso 44%)
aggiunta in corso di: client/ClientForm$6.class(in = 718) (out= 399)(compresso 44%)
aggiunta in corso di: client/ClientForm$7.class(in = 718) (out= 400)(compresso 44%)
aggiunta in corso di: client/ClientForm$8.class(in = 718) (out= 399)(compresso 44%)
aggiunta in corso di: client/ClientForm$9.class(in = 718) (out= 398)(compresso 44%)
aggiunta in corso di: client/ClientForm.class(in = 33070) (out= 13510)(compresso 59%)
aggiunta in corso di: client/ClientForm.form(in = 131398) (out= 4521)(compresso96%)
aggiunta in corso di: client/ClientForm.java(in = 73435) (out= 6863)(compresso 90%)
aggiunta in corso di: client/Icons/(in = 0) (out= 0)(archiviato 0%)
aggiunta in corso di: client/Icons/brick.gif(in = 1044) (out= 1049)(compresso 0%)
aggiunta in corso di: client/Icons/corpo.gif(in = 4011) (out= 3400)(compresso 15%)
aggiunta in corso di: client/Icons/door.gif(in = 1092) (out= 1097)(compresso 0%)
aggiunta in corso di: client/Icons/floor.gif(in = 1102) (out= 1107)(compresso 0%)
aggiunta in corso di: client/Icons/mappa.gif(in = 20901) (out= 20575)(compresso 1%)
aggiunta in corso di: client/Icons/paesaggio.gif(in = 18962) (out= 18603)(compresso 1%)
aggiunta in corso di: client/Icons/sole.gif(in = 7063) (out= 6546)(compresso 7%)
aggiunta in corso di: client/Icons/trap.gif(in = 1062) (out= 1067)(compresso 0%)
aggiunta in corso di: client/Icons/void.gif(in = 842) (out= 847)(compresso 0%)
aggiunta in corso di: client/Listener.class(in = 1869) (out= 1136)(compresso 39%)
aggiunta in corso di: client/Listener.java(in = 2296) (out= 708)(compresso 69%)
aggiunta in corso di: client/manifesto.txt(in = 62) (out= 58)(compresso 6%)
aggiunta in corso di: client/ScorciatoieDialog$1.class(in = 740) (out= 391)(compresso 47%)
aggiunta in corso di: client/ScorciatoieDialog$PopupListener.class(in = 1579) (out= 773)(compresso 51%)
aggiunta in corso di: client/ScorciatoieDialog.class(in = 3524) (out= 1638)(compresso 53%)
aggiunta in corso di: client/ScorciatoieDialog.form(in = 8500) (out= 910)(compresso 89%)
aggiunta in corso di: client/ScorciatoieDialog.java(in = 5676) (out= 1222)(compresso 78%)
jar umf mainclass.txt client.jar[NOTE: mainclass.txt only contains the line "Main-Class: client.Client"]
java -jar client.jarFailed to load Main-Class manifest attribute from
client.jar
I've also tried to manually create a MANIFEST.MF file that only contained the following lines:
Manifest Version: 1.0
Main-Class: client.Client
guess what was the result?
java -jar client.jarException in thread "main" java.io.IOException: invalid manifest format
at java.util.jar.Manifest.read(Manifest.java:193)
at java.util.jar.Manifest.<init>(Manifest.java:52)
at java.util.jar.JarFile.getManifest(JarFile.java:158)
>
the same procedure with the addition of "Name: client/" before the main-class attribute generated the usual "Failed to load Main-Class manifest attribute" result. So now what?!? I'm getting crazy....

Simple Query, Manifest file, Jar, Main-Class

Hello :P thanks for reading my post.
I compiled a java file which gave me:
*.class
*$1.class
Then I created a jar file which i want to run when a user clicks on a link or button ect.
I have the latest SDK and the -e mod did not exist :( so i used cfm with a manifest.txt file.
I've tried using the following in my index.html file to run the hello world Swing application:
<html>
<head> <title>HelloWorldSwing</title>
</head>
<body>
<h1>my heading</h1>
<applet code=HelloWorldSwing codebase=classes archive=HelloWorldSwing.jar
width=695 height=525>
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It gives me an error saying it cant access the class HelloWorldSwing.
I belive it might be my Main-Class: classname in the Manifest.txt file.
*I can't get my head around the format of classname.
I was wonder if a kind soul would tell me what my classname is ment to look like. I've read a few examples and I just don't seem to grasp the concept.
Mabey i'm going about the whole thing the wrong way.
More info:
HelloWorldSwing.java contains the following code:
* HelloWorldSwing.java requires no other files.
import javax.swing.*;
public class HelloWorldSwing {
* Create the GUI and show it. For thread safety,
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private static void createAndShowGUI() {
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frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
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JLabel label = new JLabel("Hello World");
frame.getContentPane().add(label);
//Display the window.
frame.pack();
frame.setVisible(true);
public static void main(String[] args) {
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javax.swing.SwingUtilities.invokeLater(new Runnable() {
public void run() {
createAndShowGUI();
}

The Main-class attribute in the manifest is for when you do java -jar myjar.jar. It has nothing to do with applets, where you specify the class in the HTML.
The format of the class name is package.classname.
Your problem is that HelloWorldSwing is a main program, not an applet. It has to extend java.applet.Applet.

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If I declare the application-desc element as <application-desc main-class="player">, the player.class will be launched from web. But if I declare it as <application-desc main-class="appmain">, the .abc extension wil be associated to the appmain.class.
Does anyone know how to solve this problem? Thank you for your kindly help.

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ANT - Jar File include another Jar file and importing classes

Here is the directory structure i have set up:
FTPGetter
\src
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          - Login.java
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nevermind I got that fixed now:
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>
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