NoClassDefFoundError for a packaged class

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NoClassDefFoundError for a packaged class

I'm trying to run a jar file that uses the YouTube Data API and I'm getting a NoClassDefFoundError for one of the API classes:

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AuthenticationException.class is found in the gdata-core-1.0 jar:

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The gdata-core-1.0 jar has been added to my classpath:

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What am I doing wrong?

Perhaps you may not be having the jar in the classpath. The command prompt execution does not set the classpath. You will have to either do it by yourselves or give it on the fly while executing.

You should probably take a look at setting the MANIFEST file correct for the JAR file.

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Bragboy 2010-06-16 17:59:11

It's highlighted in the last image

Anthony 2010-06-16 17:59:59

Yes, but the exception you're getting is in the command prompt and not in the Eclipse. Correct me if I'm wrong

Bragboy 2010-06-16 18:00:57

The classpath created in Eclipse is in the the jar file that I try to run. Do I need to set it again in the command prompt?

Anthony 2010-06-16 18:02:36

Ah!! Got it!! There will be a file called MANIFEST.MF in the jar, you will have to set the classpath there!! See my updated answer

Bragboy 2010-06-16 18:07:00

Does your jar-File contain the necessary libraries? When you execute your program outside of eclipse, the classpath defined in eclipse does not apply.

If no, you can take a look at this question which has been already answered.

cmaderthaner 2010-06-16 18:03:14

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NoClassDefFoundError for a packaged class

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