# Java Project Dependency not recognized - NoClassDefFoundException

**URL:** <https://community.ofelia.com/t/java-project-dependency-not-recognized-noclassdeffoundexception/10564>\
**Category:** Q&A\
**Created:** [5 January 2021 09:26 UTC](https://community.ofelia.com/t/java-project-dependency-not-recognized-noclassdeffoundexception/10564 "2021-01-05T09:26:38Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Blaubunt](https://avatars.discourse-cdn.com/v4/letter/b/85f322/32.png) [@Blaubunt](https://community.ofelia.com/u/Blaubunt)\
**Post date:** [5 January 2021 09:26 UTC](https://community.ofelia.com/t/java-project-dependency-not-recognized-noclassdeffoundexception/10564/1 "2021-01-05T09:26:38Z")

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I have a Java Project with Objects and Classes to use in Connectors in Bonita Studio. I see the class definitions when I initialize eg a Pool Variable and can select my class type. Whenever I use something from that jar in a Java Connector inside Bonita Studio I run into NoClassDefFoundException when executing the process.

How can I use custom Objects and Classes in Bonita Connectors?

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**Author:** ![emmanuel.duchastenie](https://dub1.discourse-cdn.com/flex013/user_avatar/community.ofelia.com/emmanuel.duchastenie/32/723_2.png) [@emmanuel.duchastenie](https://community.ofelia.com/u/emmanuel.duchastenie)\
**Post date:** [2 February 2021 14:08 UTC](https://community.ofelia.com/t/java-project-dependency-not-recognized-noclassdeffoundexception/10564/2 "2021-02-02T14:08:32Z")

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Hi,

If you use a Bonita-provided connector, you must declare your jar in the list of dependencies of your process (in the configuration options).

If you use a custom connector you need to declare your Jar as a dependency of your connector, so that your connector implementation packages the jar inside it.

Hope this helps,  
Emmanuel