java.lang.NoClassDefFoundError when running my java program

Question

i'm new with java. when i come to run my java app i'm getting this error below:

java.lang.NoClassDefFoundError: org/apache/poi/EncryptedDocumentException

the issue it is ALSO happens when i'm adding the classpath to my command:

java -jar myApp.jar -classpath .\lib

BUT, when i'm copy myApp.jar to the lib direcotry and running form there it's working fine.

thanks for the help guys.

What build tool are you using ? you need to make sure that org/apache/poi/EncryptedDocumentException is in the runtime class path. If you are using maven the delete your old manifest and do a mvn clean install on your project to regenerate it. — StackFlowed
– StackFlowed, Commented Dec 29, 2015 at 19:01
Possible duplicate of Why am I getting a NoClassDefFoundError in Java? — StackFlowed
– StackFlowed, Commented Dec 29, 2015 at 19:03
i used maven. but where is the mainfest file? i don't find it. — Asfbar
– Asfbar, Commented Dec 29, 2015 at 19:06
Should be in your target folder ... Just try mvn clean install it should regenerate it. — StackFlowed
– StackFlowed, Commented Dec 29, 2015 at 19:08

Community · Accepted Answer · 2017-05-23 12:31:24Z

1

You cannot use both -jar and -classpath at the same time. If you use -jar, it will ignore your -classpath and use settings from the manifest in the jar. Try all in the classpath:

java -cp myApp.jar:lib/*:. mypackage.MyClass

On Windows you need to use ';' instead of ':'

java -cp myApp.jar;lib/*;. mypackage.MyClass

See similar question here: Execute jar file with multiple classpath libraries from command prompt

edited May 23, 2017 at 12:31

CommunityBot

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answered Dec 29, 2015 at 19:06

Andrew Williamson

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3 Comments

Asfbar Over a year ago

{java -cp cloneXl-0.0.1.jar:lib/*:. com.xxx.myJavaTraining.CloneXL Error: Could not find or load main class com.xxx.myJavaTraining.CloneXL}

Andrew Williamson Over a year ago

That's weird... try: java -cp cloneXl-0.0.1.jar:lib:. com.xxx.myJavaTraining.CloneXL

Andrew Williamson Over a year ago

Is this being run from the same directory that the jar lives in? Since it's being specified by -cp, it won't warn you if the path doesn't point to anything. Also, double-check the jar - if you open it, does it contain the class you are intending to use? Other than that, I'm out of ideas.

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