26 Oct 2008

How to create executable jar file with NetBeans IDE

Finally after fruitlessy searching for hours, I found out how to create executable files with NetBeans 6.1:

  1. Right-click with the mouse on your project: “Set as Main Project”
  2. Right-click with the mouse on your project: “Properties” then “Run”
  3. Select your Main Class
  4. in “Libraries” click on “ADD JAR/Folder” and add your wanted libraries
    (ATTENTION! If you add libraries as “Customized libraries” instead of “JAR/Folder” the jar file will not work!)
  5. click “OK”
  6. from the menu select “Build” then “Clean and Build Main Project” (Maiusc+ F11)
  7. in the Output window you will see where the jar will be created, generally under “/(build-path)/dist/”
    If you have added libraries, these will be in a folder under “/(build-path)/dist/lib”.

Remember to manually add files, in the folder where there is the jar, you maybe used in your project, for example if you read them.

In the same folder of the jar file you will also find a README.TXT, for example:


When you build an Java application project that has a main class, the IDE
automatically copies all of the JAR
files on the projects classpath to your projects dist/lib folder. The IDE
also adds each of the JAR files to the Class-Path element in the application
JAR files manifest file (MANIFEST.MF).

To run the project from the command line, go to the dist folder and
type the following:

java -jar “Testprogram.jar”

To distribute this project, zip up the dist folder (including the lib folder)
and distribute the ZIP file.


* If two JAR files on the project classpath have the same name, only the first
JAR file is copied to the lib folder.
* Only JAR files are copied to the lib folder.
If the classpath contains other types of files or folders, none of the
classpath elements are copied to the lib folder. In such a case,
you need to copy the classpath elements to the lib folder manually after the build.
* If a library on the projects classpath also has a Class-Path element
specified in the manifest,the content of the Class-Path element has to be on
the projects runtime path.
* To set a main class in a standard Java project, right-click the project node
in the Projects window and choose Properties. Then click Run and enter the
class name in the Main Class field. Alternatively, you can manually type the
class name in the manifest Main-Class element.

(Thanks to google and this forum)

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34 Responses to “How to create executable jar file with NetBeans IDE”

  1. Thanks for content. I too searched a lot for atricles related to creating jar files and succeeded after reading this content.



  2. Really?
    I’m very glad you found it useful! :)



  3. thanks a lot for this content



  4. You’re welcome! ^^



  5. Step2 : When right click on my project then choose “Properties”.
    I only saw “Running” ( not Run)
    And haven’t “Librarie” anywhere.

    am using :
    Product Version: NetBeans IDE 6.5 (Build 200811100001)
    Java: 1.6.0_11; Java HotSpot(TM) Client VM 11.0-b16
    System: Windows XP version 5.1 running on x86; Cp1252; en_US (nb)

    Help me plz !
    Thank you very much !



  6. Doesn’t make sense, are you sure?
    Don’t you have something like this?



  7. Thanks very very much……..

    This is really useful 4 me….

    Thanks again!



  8. You’re very welcome! :)



  9. It’s an useful information, many thanks.



  10. You’re welcome! :)



  11. hi…im using netbean 6.8.
    after i finish all 7 steps i couldn’t run it in my mobile phone…
    is there any extra things i need to do so that i can run it in mobile phone?



  12. I don’t know, unfortunately I’m not a mobile-software developer…



  13. ^^ thank you…



  14. You’re welcome.

    Good luck!



  15. I tried to create jar using above steps.
    n when I run jar using given command i get error as
    “Failed to load Main-Class manifest attribute from myJar.jar”

    I have added Main-Class attribute in Manifest.mf but still same error..
    Contents of Manifest are
    Manifest-Version: 1.0
    Ant-Version: Apache Ant 1.7.0
    Created-By: 1.6.0-b105 (Sun Microsystems Inc.)
    Main-Class: ppb.MainClass
    Can u help me??



  16. I think you need to modify the Mainifest so that it specifies Main-Class, see also


    Did you use Netbeans?



  17. Awesome.. Thank you for ending my search.. ♥



  18. You’re welcome! 😉



  19. can any one set image on where to click the this mentioned up there..




  20. What do you mean?



  21. I tried as it says but for some reason the jar does not run at all please help.



  22. If you have more information would be helpful.
    What does not work exactly?



  23. Well the jar does not run and my program does not begin i really do not understand because i used to make jars but it does not execute.




  24. Uhm, I don’t know…
    Maybe try the jar on a different PC and check if it’s working there?



  25. will do



  26. Thanks a lot, very usefull, I got my .jars running. Greetings from Spain.



  27. No problems, you’re welcome!



  28. Thanks a Lot for your information but after creating jar file I got error “failed to load Main-class manifest attribute form” plz tell any solution about this problem………



  29. Thanks alot. Very useful. Please tell me if there is a way i can run the jar file without using cmd line interface



  30. grt…it works…..



  31. @Pooja: please try again, there is a problem with your Main Class.

    @Poonam: I don’t know, I think that in Windows you can install some sort of JAR plugin that allows you to double-click on jar and run them immediately. Let me know!



  32. thanks for this content yar



  33. how we make jar file in netbeans



  34. Fantastic Content. Very Clear !!!!!!!!!!!!..

    This Executable jar not work in out of this dist folder.

    help me for this….


    Dhileepan Chakravarthy

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