Creating an executable JAR

edited mainfest file by create a text file MainClass.MF and added this in
Manifest-Version: 1.0
Main-Class: test_gui
left two carriage returns and saved file as MainClass.MF included three other classes I required into MailMerge.jar in command line as follows
jar cmf MainClass.MF MailMerge.jar classone.class classtwo.class classthree.class test_gui.class
tried executing application by double clicking but failed, tried executing application through the comand line as follows
java -jar MailMerge.jar, and got following error. There is a main method in test_gui, tried running application normally by running java test_gui and it worked successfully, what have I done wrong with my jar!!!
Exception in thread "main" java.lang.NoClassDefFoundError: javax/mail/MessagingException
at test_gui.<init>(test_gui.java:25)
at test_gui.main(test_gui.java:138)

The value given to Class-Path should be a plain list of file names with whitespace as separator. Also, the list should be portable so it should only contain relative paths -- unix computers don't have a C: drive, and what if someone puts the library files somewhere else than your hardcoded place.
The Class-Path line should look like "Class-Path: activation.jar mail.jar" and those .jars should be in the same directory with your MailMerge.jar.
Exception in thread "main" java.lang.NoClassDefFoundError: test_guiThe class test_gui is not in the .jar file. You probably used "jar -cmf" and forgot that the "c" creates a new .jar file, overwriting the existing one. You should have used "u" to update.

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Create the executable jar's file

Hi guys,
I am working on java desktop's application where a user will be able to run the application by double click the executable jar file. I followed the description of "Creating and Deploying a Simple Archive to Your File System of the help. After creating the jar file and when I double click on jar file to run the application I got this error message "Could not find the main class. Program will exit". I was not also able to run the application on the dos command.
Please help. I don't have any problem when I run from Jdeveloper 9.0.4. I have window XP professional.
Your input will be very welcomed.

OK open up your deployed Jar file in something like Winzip and have a look at the Manifest.MF in meta-inf\
I've just created an executable JAR with a main class of mypackage1.Class1 and it all ran ok. Here's the manifest:
Manifest-Version: 1.0
Main-Class: mypackage1.Class1
Created-By: Oracle9i JDeveloper 9.0.2So make sure your's is similar and your Main-class looks the same - e.g. does not say something like:
Main-Class: mypackage1.Class1.class

Unable to create an executable jar file

Hi,
I am unable to create an executable jar file,
I am using the command as follows:
C\> jar cvfm MyJarName.jar manifest.txt Demo.class
where as Demo.class has appropriate main method; manifest.txt contains [ Main-Class: Demo ] and a new line
Please help.
thanks & regards
M K Rayapudi
Edited by: R6i on Apr 30, 2009 5:15 AM

Your jar is perfectly generated, but your machine has a problem with .jar file associations.
You have two options:
1. Play with the registry. Dangereous if you are not used to.
2. Reinstall the jre.
Just to verify my theory, open a command prompt and the command:
reg query HKCR\jarfile\shell\open\command
What does it say? I have executed your command , here is the output
HKEY_CLASSES_ROOT\jarfile\shell\open\command
(Default) REG_SZ "C:\Program Files\Java\jre6\bin\javaw.exe" -jar "%1" %*I am not getting anything from this command, can you please explain clearly.
thanks & regards
M K Rayapudi
Edited by: R6i on May 3, 2009 10:18 PM

Large project in JBuilder 2007... How do I create an executable JAR?

First, I've googled quite a bit and keep getting thiings about "Jbuilder Application Wizard", etc... Well, I don't see any "wizard" menu in the version of JBuilder I'm using!
I'm using JBuilder 2007 Enterprise edition, however it's a trial version apparently. I'm not sure if that matters, and perhaps the functionality was taken out with the trial version..
Anyway, the issue is that I have a multi class (with one main function) program that I want to run (it's a command line based application) as an executable JAR file. The program uses LOTS of include statements including quite a few custom libraries ("external JARs") that I had to import.
Basically I want the application to do exactly what it does now when I hit the ol' "RUN" button. Except I want to be able to run it from a batch file with "java -jar (or whatever) myProgram".
Anybody have any experience with this type of thing?

OK, here's what I've got:
I've got a jar file that contains:
1. a folder "importQD"
2. a folder called META-INF
3. a .classpath file
4. a .project file
Inside the importQD folder are my three .class files that are the classes I created myself.
Inside the META-INF folder is the MANIFEST.MF file which looks like:
Manifest-Version: 1.0
Main-Class: importQD.ImportQDInside the .classpath file we have:
<?xml version="1.0" encoding="UTF-8"?>
<classpath>
     <classpathentry kind="src" path=""/>
     <classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER"/>
     <classpathentry kind="lib" path="C:\Programs\CMQualityDocumentImport\CMUploadInterface83.jar"/>
     <classpathentry kind="lib" path="C:\Programs\CMQualityDocumentImport\DBCon.jar"/>
     <classpathentry kind="lib" path="C:\Programs\CMQualityDocumentImport\SENAeMail.jar"/>
     <classpathentry kind="lib" path="C:\Programs\CMQualityDocumentImport\SENAFileHandler.jar"/>
     <classpathentry kind="output" path=""/>
</classpath>NOTE: All of the paths point at the .jar files as they are located on the machine the final version will be running on.
Inside the .project file we have:
<?xml version="1.0" encoding="UTF-8"?>
<projectDescription>
     <name>importOldQD</name>
     <comment></comment>
     <projects>
     </projects>
     <buildSpec>
          <buildCommand>
               <name>org.eclipse.jdt.core.javabuilder</name>
               <arguments>
               </arguments>
          </buildCommand>
     </buildSpec>
     <natures>
          <nature>org.eclipse.jdt.core.javanature</nature>
     </natures>
</projectDescription>Now, it would make sense to me that this should be all good to go, and that I should be able to run this via a command line now. When I try
java -jar importQD.jar I get a ton of various errors such as "Exception in thread "main" java.lang.UnsupportedClassVersionError: importQD/importQD (unsupported major.minor version 49.0) + a nice stack trace with a bunch of java.lang and java.net references.
What am I doing wrong?

Creating an Executable jar file

Hello ! I have a application that has been fully developed and all i want to do is to create an executable file using my own icon so that whenever it is double clicked it opens up the appliation.
Please provide an example fro easy refrence.
Thanks

i have the procedure for creating executable jar file in a separate file.
if u r interested then mail me at:
[email protected]
regards
Md. Afroze

Creating an executable jar-file including a custom package

I am trying to learn how to create executable jar-files. I have managed this with a single class. However having a class which is an extention of another class which in turn belongs to custom package, I can't make it work.Running the program normally is not a problem. I don't think the problem is the actual code, but I will include it here anyway. I create the jar-file using:
jar -cmf Direkt2b.txt Direkt2b.jar *.class
where Direkt2b.txt is just:
Main-Class: Diriekt2b
Only the main class-file is included this way. Copying the other file to the same directory before creation doesn't help either. There is no error messages, the jar-file just refuses to run no matter what.
The main-class:
import java.awt.*;
import extra.*;
class Direkt2b extends ExtendedFrame {
     Font f;
     Direkt2b() {
          f = new Font("SansSerif", Font.BOLD, 24);
          setBackground(Color.yellow);
          setSize(400,150);
     public void paint(Graphics g) {
          g.setFont(f);
          g.setColor(Color.blue);
          g.drawString("V?lkommen till Java Direkt", 45, 100);
     public static void main (String[] arg) {
          Direkt2b d2 = new Direkt2b();
          d2.setVisible(true);
The help-class:
package extra;
import java.awt.*;
import java.awt.event.*;
public class ExtendedFrame extends Frame {
     private static boolean first = true;
     private boolean isFirst = first;
     public ExtendedFrame() {
          addWindowListener(theListener);
          first=false;
     WindowAdapter theListener = new WindowAdapter () {
          public void windowClosing(WindowEvent e) {
          dispose();
          if (isFirst)
               System.exit(0);
}

My problem wasn't really getting more than one class in a jar-file,
but rather that my jar-file with multiple classes wouldn't execute.
Reading the original post I realized that maybe I was unclear about that.
However I have solved the problem now so for anybody reading this
thread in the future I will tell you how.
The general setting is this: You have a bunch of self-made help-classes
organized in some classdirectory somewhere in the filesystem. You use these
in your programming from time to time. You have set a classpath-varible
in your OS such that Java could find your help-classes.
Now you want to create executable jar-files so that you could publish your work.
My problem was that while I added all needed classes in a jar-file, the main-class
couldn't find the others because they were referenced incorrectly. The solution I
came up with may not be elegant, but it works. I copied the main-class and all directories
(only one in my case) just as they appear in the classpath-directory, to the same temporary
directory. Then I created the jar-file from there, using: jar -cmfv Direkt2b.txt Direkt2b.jar Direkt2b.class extra/*.class
I suspected that incorrect referencing was the problem and I tried several variations on the theme above
before giving up and writing the first post. Part the problem was that I didn't get any error messages,
just an annoying error-sound double-clicking the jar-file. I learned later that you could run jar-files from
the command -prompt using: java -jar myjarfile.jar. This way you get a more useful response.
I guess there is a way to include the classpath instead somehow, but I will use my method for now.
I hope this was helpful to somebody.

How do I create an executable JAR File ?

Hi,
Let's say I have several Class Files that perform a special task.
How do I bundle them in a JAR file and make it executable, so that the user simply types "prog.jar" and is happy.
I wonder how that works, as I have to tell the starting point for execution.
Does anybody now ?
cu
Oliver

Three importants things to do :
- don't forget to indicate in your manifest.mf the main class and the pacckage
ex:
Manifest-Version: 1.0
Main-Class: mypackage.MyMainClass
Created-By: 1.3.0 (Sun Microsystems Inc.)
- don't forget to associate the .jar file with the application java.exe -jar -classpath %CLASSPATH%
- don't forget to set the environment CLASSPATH correctly
Hope this help
Jean

How do i create an executable jar?

I have built a GUI, and want to make it executable. I have tried compiling it to a jar, but when i double click this nothing happens. I even added Main-Class to the manifest file but still no luck.
any help would be appreciated, or a link to a good tutorial. I have already tried the sun tutorial, but it still doesnt work.
Thanks
Ben

I got it working :D
jar -cfm TestJar.jar manifest.txt GUI.class GUI$1.class ./org/gui/*.class ./info/clearthought/layout/*.class
java -jar TestJar.jar
This created the .jar. I will experiment with Class-Name: later, atleast i have something to show now.
Thanks to everyone for their help on this matter
Ben
edit:
just changed the manifest file to include,
Class-Path: JCalendar4.jar TableLayout.jar
Worked a dream..... thanks everyone i think i have a pretty good grasp on how to create jars now. Just need to learn now how to create jnlp files :D
Message was edited by:
CyborgAvenger

How to create executable jar in eclipse using linking in compiler

Hi,
I have a project in Eclipse. I wrote already an ant build file for creating an executable jar which includes all project files.
Now I want to create a second executable jar which is a subset of the project (a limited number of classes are necessary).
I have a main class and I was looking for a way to generate a jar file which includes the main class and all the depending classes.
Is there a way to do it? With ant or with another tool?
Is it possible to compile a project given a main class, and include all depending classes?
Regards,
Biebel
Edited by: biebel1975 on Jan 7, 2009 10:21 AM

biebel1975 wrote:
Some more information:
When I compile all the classes, the jar file is +/- 3.5Mb inclusive the server side logic.
The subproject I want to build, should be less then 1Mb (Only some screens and beans, no business logic ((only +/- 10% of the projects code) )).
My question is: How can I create a executable jar with only the necessary class files which depends on the main class. (Linked with the imports).
Is there a tool to do that? Can it be done with an ANT script? If so, how does the script looks?
What are you talking about?
You already said that you are using Ant.
Ant uses script files.
Since you have one with X items in it and you want something new with X-Y items in it the obviously it would make sense to construct an ant script that does less than the other ant script.
The following provides a huge amount of information about Ant.
[http://ant.apache.org/resources.html]
Other than that no one can tell you want your Ant script will look like except that it will do less than the one that you already have.

Create executable jar and run it

hi ,
I want to create an executable jar file for my Swing application in windows environment and I want to run that jar file by double clicking on it. What should I do?

I can't beleive I'm saying this given that I didn't like it only 3 months ago but if you change your development environment to Eclipse rather than JCreator/JBuilder or whatever, it saves all that creating manifest files by having one menu item, "Export". You should take a look at minifest files though and at least understand them, they aren't complex at all.

Create Executable Jar file

How do I creat a Executable Jar file?

on my WIndows XP jars are automatically "executable".
if its not on yours (you can check) check out this thread:
http://forum.java.sun.com/thread.jspa?threadID=653572&tstart=0

Creating executable jar from a project

Dear all,
I created a GUI project with ms-access as backend. now i want to create an executable jar out of these project(all classes). so any one please guide to achieve this. I am using netbeans 5.5.
thank you,
ishan

From Projects window in netbeans, right click your project, and from context menu select Properties. From Project Properties Dialog
highlight Run which in the left pane tree.
on the right pane select the main class of your project by writting its complete package path in the field beside "Main Class:" label, or simply click "Browse..." to choose it.
And have a nice time.
Thanks.
Ahmad Elsafty

I dont see the point of using Ant Build compared to executable Jars?

I always think that to complete a project you successfully build it. And i thought that building is done automatically if you create an executable JAR? So what is ANT for?
Arent Executables is the same as building your project?

paulcw wrote:
They are all unnecessary for a single person doing small projects (although often still necessary).I assume you meant "(although often still useful)".
And furthermore you may find that the vast majority of your time programming professionally isn't the programming, but just managing these other aspects.It is a good day for me when that is not the case ;-)
There should be a class in university: "industrial practices". It would have little or no CS theory but all the stuff that you learn the first year on the job (often painfully).The company I work in really likes to hire young developers, which often means that they come right from school (gladly, we have some good IT-centric schools in the area). They usually get some introduction in some of these aspects in school (usually mostly version control, bug tracking and a little bit of automated builds). But even if they heard about them, used them for a simple project and get the general idea, they still don't believe them to be necessary until they see what a pain in the back it can be not to have all that in a medium-sized project.

Problem running my program only after making an executable jar...

Hi everyone,
I am having trouble running my program after creating an executable jar. The program runs fine until
it is supposed to open a specific JFrame. I get the following error message as soon as the frame tries
to open:
Exception in thread "AWT-EventQueue-0" java.lang.NoSuchMethodError: org.apache.xerces.parsers.SAXParser.<init>(Lorg/apache/xerces/xni/parser/XMLParserConfigurat
ion;
Has anyone ever seen this before?
The strange thing is, this does not happen when I build and run the project under Eclipse.
Any help or tips would be appreciated!
Chris

Roosh wrote:
The strange thing is, this does not happen when I build and run the project under Eclipse.
Any help or tips would be appreciated!Make sure you are using the same version of Java as you use with Eclipse.

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

Creating an executable JAR

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