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How to create jar file from eclipse?
Hi,
I need to create a JAR file of my java project. In my project I have added 3 additional jar files - jython-2.5.4-rc1.jar,netty-3.9.0.Final.jar and commons-codec-1.9.jar. I have created JAR file of my project from Eclipse. But when I try to run that jar file from command promt (java -jar myjar.jar) I get NoClassFoundException for one of my additional jar files. Any idea why I am getting this error.
exception.jpg
Related threads:
Re: How to create jar file from eclipse?
What is in the jar that you create? Is that class in there? Are any classes from the library jars in there?
Eclipse has options to include library jars inside a runnable jar. Make sure you select them, otherwise you'll have to add the library jars to the classpath whenever you run it.
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Re: How to create jar file from eclipse?
Does that mean there is a classloader that can read classes from a jar file that is inside of another jar file?options to include library jars inside a runnable jar.
If you don't understand my answer, don't ignore it, ask a question.
Re: How to create jar file from eclipse?
Where is the missing class file? Do you want all the classes merged into a single jar file or can some classes be kept in other jar files that are referenced by an entry in the Manifest file?
NOTE: You can ignore most of this. I don't know how to use eclipse.
If you don't understand my answer, don't ignore it, ask a question.
Re: How to create jar file from eclipse?
Sorta. You can either extract the .class files from the library jars into the runnable jar, or add the library jar files themselves along with classes that allow loading from them, all inside the runnable jar. More info here: eclipse - What is the difference between runnable jar library handling options? - Stack OverflowOriginally Posted by Norm
--- Update ---
OP, you want to be exporting a *runnable* jar file.
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Norm (May 14th, 2014)
Re: How to create jar file from eclipse?
My two java files and three external jars are there. So what did you mean by the missing class file?
Re: How to create jar file from eclipse?
We're simply referring to the error.
Just adding the jars isn't enough. You need to add the classes that handle loading from the library jars. Eclipse does this automatically when you export as a RUNNABLE jar. That's a different option in the export menu.
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shoharb.uddin (May 14th, 2014)
Re: How to create jar file from eclipse?
I was calling the class that was not found the missing class.I get NoClassFoundException
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Re: How to create jar file from eclipse?
ok. so far i have tried only jar not runnable jar. let me try it now and then get back to you.
--- Update ---
It works after creating the runnable jar file instead of creating the simple jar file.
Thank You very much.
Re: How to create jar file from eclipse?
Creating a JAR file using Eclipse IDE:
Right click on your project, which you want to create a JAR file of. And select Export from the context menu.
Select JAR file from Java folder and click Next.
In eclipse Latest version Runnable JAR file is added.
Provide the Destination path and click on Finish to create the JAR.
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