Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/http/HttpEntity

Question

This error keeps bothering me for a long while. I need to export my java app to .jar and when I run it (java -jar test.jar) I get this error message. I've checked that the apache-core-4.3.3.jar is included, I've checked that it contains HttpEntity class, I've checked java build path and manifest but everything is OK.

The weirdest thing is that in my code I don't try to import org.apache.http.HttpEntity at all. And I've got only 3 classes so I wouldn't miss it.

Library imported

Manifest file:

Manifest-Version: 1.0
Main-Class: Main

Classes:

My classes

EDIT I export it like this, so I think imported jars' content is exported to my test.jar file thanks to Export Java source files and resources, am I right?

export

What is the next thing I should do?

When you say it is included, do you mean inside the jar? Or inside eclipse like you show in the screenshot? In any case, the fact that you get the exception means that some code or library is using that particular class. — MajorT
– MajorT, Commented Jan 9, 2015 at 8:22

MajorT · Accepted Answer · 2015-01-09 08:34:57Z

1

You are exporting it as a 'JAR file', try using the 'runnable JAR file' wizzard.

Right click your eclipse project -> Export.. -> Runnable JAR file -> Pick your configuration and choose "package required libraries into generated JAR". This will make eclipse do al the work for you.

answered Jan 9, 2015 at 8:34

MajorT

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Jens · Accepted Answer · 2015-01-09 08:24:16Z

0

You have to add the jars to the classpath in commandline:

java -cp <list of jars> -jar test.jar

answered Jan 9, 2015 at 8:24

Jens

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5 Comments

Jakub Turcovsky Over a year ago

like java -cp "org.apache.http-core-4.3.3.jar; nextlibrary.jar; nextone.jar" -jar test.jar?

Jens Over a year ago

@2rec Yes but without quotes and pth path name.

Jakub Turcovsky Over a year ago

excuse me, pth path name is what exactly?

Jens Over a year ago

@2rec the path to the jar file in your screenshot C:\eclipse\... or you copy the files in the same directory as test.jar

Jakub Turcovsky Over a year ago

MajorT's answer is more elegant and also working but thanks a lot for your time

shikjohari · Accepted Answer · 2015-01-09 08:29:17Z

0

Update the class path. It should work

answered Jan 9, 2015 at 8:29

shikjohari

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