Jar file execution problem

[sudhakarpothu]

Hello friends,

I have a project folder in which i have 4 packages

application
ui
controller
model and
a folder Datafile containing project related xml and text files

my main class is in application package

I am creating a jar file of my whole project folder in Eclipse environment, using the main class as TheApplication in application package. I am able to generate the jar file but unable to execute it.

When I tried to execute it from command prompt it is giving me an error saying no main,

Please tell me what I am doing wrong, and suggest me a solution

Thanks in advance

 

[Diancecht]

http://www.tek-tips.com/viewthread.cfm?qid=1336665&page=1

Cheers,
Dian

 

[sudhakarpothu]

I have already tried all those but something seems to be wrong, May be i need to put all my class files in one folder

 

[Diancecht]

Post the actual error, the way you're executing the jar and the way you're setting the main class.

Cheers,
Dian

 

[sudhakarpothu]

I have a Exception

Exception in thread "AWT-EventQueue-0" java.lang.noclassdeffounderror: org/jdom/Document

I added jdom.jar in my libraries from before

I dont know whats wrong,

I am running it from command prompt

java -jar project.jar

manifest is

Manifest-Version: 1.0
Main-Class: oopsProjectApplication.TheApplication

any suggestions

 

[stefanwagner]

Manifest has to be:

Manifest-Version: 1.0
Main-Class: oopsProjectApplication.TheApplication
Class-Path: ../lib/jdom123.jar:../.lib/jdom345.jar

a) I'm not sure, whether .. is allowed inside a Manifest, to specify the classpath.
b) Look for the exact syntax (Classpath, Class-Path) in the Javadocs.
c) Is it a good idea, to specify inside a jar (often solely shipped without third party jars) where the user might have installed these jars?

Perhaps a better way would be, to put all jdom-related jars in $JAVA_HOME/jre/lib/ext/.


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[Diancecht]

You can specify a classpath in your manifest, but that will make jar not portable as the path of the related jars is fixed.

Better include a kind of documentation to specify which jars need to be added to the classpath.

Cheers,
Dian

 

[sudhakarpothu]

Hi StefanWagnar,

your idea

Perhaps a better way would be, to put all jdom-related jars in $JAVA_HOME/jre/lib/ext/.

worked out perfectly,

thanks a lot.