Launch4j - Exception in thread "main" java.lang.NoClassDefFoundError: javax/mail/MessagingException

Question

I used launch4j (http://launch4j.sourceforge.net/) software to create an executable of my application created in java netbeans.

I did everything as I saw in a tutorial, just that when I run the exectutavel it creates in my application, it gives this error:

enter image description here

The message shown below is:

 Exception in thread "main" java.lang.NoClassDefFoundError: javax/mail/MessagingException
at java.lang.Class.getDeclaredMethods0(Native Method)
at java.lang.Class.privateGetDeclaredMethods(Unknown Source)
at java.lang.Class.getMethod0(Unknown Source)
at java.lang.Class.getMethod(Unknown Source)
at sun.launcher.LauncherHelper.getMainMethod(Unknown Source)
at sun.launcher.LauncherHelper.checkAndLoadMain(Unknown Source)
 Caused by: java.lang.ClassNotFoundException: javax.mail.MessagingException
at java.net.URLClassLoader$1.run(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
    ... 6 more

Does anyone can help me solve this problem please.

I've been searching but I can not solve. I apologize for this question but am new to java.

Thank you all.

Greetings

did you bundled Java mail jar with application? – Sanjeev May 07 '14 at 11:12 — Sanjeev, May 07 '14 at 11:12
Thanks for reply. How can I do that? – strange_098 May 07 '14 at 11:22 — strange_098, May 07 '14 at 11:22

score 2 · Answer 1 · edited May 23 '17 at 11:56

2

In your launch4j configuration file add the jars like this

<classPath mainClass="your.main.class">
    <cp>path/to/javamail.jar</cp>
    <cp>path/to/folder/*.jar</cp> // you can also add all the jars in a folder like this
</classPath>

It will automatically bundle them.

Hope this helps

EDIT

Just went through netbeans integration with launch4j and it seems there is no way to write your on config xml file instead it prompts you in launch4J GUI for dependencies. I searched and found this Stackoverflow Post. This is what you want. Good Luck.

edited May 23 '17 at 11:56

Community

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answered May 07 '14 at 11:28

Sanjeev

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Thanks for the reply and the code that you kindly provided. But where do I insert this code? – strange_098 May 07 '14 at 12:34
In your launch4j configuration file that you used to create executable – Sanjeev May 07 '14 at 12:35
But the file is a .Jar :S – strange_098 May 07 '14 at 12:38
launch4j.jar is separate then the configuration file that is an xml where you configured all the things related to creation of executables – Sanjeev May 07 '14 at 12:39
I add this: Class-Path: lib/mail.jar on manifest.mf, but gives me the same error... – strange_098 May 07 '14 at 13:11
Are you creating exe or not ? – Sanjeev May 07 '14 at 13:14
Then search and find launch4j xml config file and entery there – Sanjeev May 07 '14 at 13:18
This does not exist. Did you mean Build.xml? – strange_098 May 07 '14 at 13:22
just edited answer .. please go through the link in it – Sanjeev May 07 '14 at 13:44
Thanks for reply, it's really help. It works, but only appears the first form login. then gives this error: ja.null.pointer.Exception you know why? – strange_098 May 07 '14 at 14:11

score 1 · Answer 2 · answered May 07 '14 at 11:12

1

Add Java mail jar to classpath.

Download it from here http://www.oracle.com/technetwork/java/javasebusiness/downloads/java-archive-downloads-eeplat-419426.html#javamail-1.4.7-oth-JPR

answered May 07 '14 at 11:12

Jay

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Thanks for reply. how can I Add Java mail jar to classpath? Sorry for question, but i'm new at programming java... – strange_098 May 07 '14 at 11:21
One way is, from you Eclipse project right click > Properties > java Build path. And in Libraries tab click Add external jars and add this jar from your hard disk location. – Jay May 07 '14 at 11:23
There will some thing equivalent. – Jay May 07 '14 at 11:26

Launch4j - Exception in thread "main" java.lang.NoClassDefFoundError: javax/mail/MessagingException

2 Answers2