# Cannot get processsing 3 core.jar to work with eclipse

**URL:** <https://discourse.processing.org/t/cannot-get-processsing-3-core-jar-to-work-with-eclipse/1112>\
**Category:** Project Guidance\
**Created:** [June 20, 2018, 5:01am UTC](https://discourse.processing.org/t/cannot-get-processsing-3-core-jar-to-work-with-eclipse/1112 "2018-06-20T05:01:02Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![zejton](https://avatars.discourse-cdn.com/v4/letter/z/f0a364/32.png) [@zejton](https://discourse.processing.org/u/zejton)\
**Post date:** [June 20, 2018, 5:01am UTC](https://discourse.processing.org/t/cannot-get-processsing-3-core-jar-to-work-with-eclipse/1112/1 "2018-06-20T05:01:02Z")

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**Issue description**  
So I have tried for a couple of days to get processing 3 to work with eclipe without any luck. I have opened a thread on stackoverflow and i did not fully understand the answers i got there. Really thankful if anyone could help with this problem. _The thing is that when i import the core.jar from processing 2, it all works , but not with processing 3 core._

Over att stackoverflow they where saying that i should put some jars into my classpath, is it the way to go?

You can see the errors on my tread over at stackoverflow.

**URL(s) of affected page(s)**  
I have followed this tutorial : [https://processing.org/tutorials/eclipse/](https://processing.org/tutorials/eclipse/)

this is my thread on stackoverflow: [https://stackoverflow.com/questions/50822590/using-eclipse-with-processing-cannot-get-java-application-to-run](https://stackoverflow.com/questions/50822590/using-eclipse-with-processing-cannot-get-java-application-to-run)

This is another thread that suggest that i need to add some mac-specific jars??:

stackoverflow DOT COM/questions/50822590/using-eclipse-with-processing-cannot-get-java-application-to-run

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**Author:** ![monkstone](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.processing.org/monkstone/32/64_2.png) [@monkstone](https://discourse.processing.org/u/monkstone)\
**Post date:** [June 20, 2018, 2:10pm UTC](https://discourse.processing.org/t/cannot-get-processsing-3-core-jar-to-work-with-eclipse/1112/2 "2018-06-20T14:10:48Z")

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You should use jdk8 to get processing to work on eclipse, with MacOS you may also need [https://github.com/processing/processing/blob/master/core/apple.jar](https://github.com/processing/processing/blob/master/core/apple.jar) on your classpath to supply Mac specific stuff.

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**Author:** ![zejton](https://avatars.discourse-cdn.com/v4/letter/z/f0a364/32.png) [@zejton](https://discourse.processing.org/u/zejton)\
**Post date:** [June 21, 2018, 7:57am UTC](https://discourse.processing.org/t/cannot-get-processsing-3-core-jar-to-work-with-eclipse/1112/3 "2018-06-21T07:57:00Z")

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Hey!

thanks for the answer, i did a reinstall of eclipse and jdk8 and it worked, thanks alot!!

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**Author:** ![benjgorman](https://avatars.discourse-cdn.com/v4/letter/b/f19dbf/32.png) [@benjgorman](https://discourse.processing.org/u/benjgorman)\
**Post date:** [March 19, 2019, 10:07pm UTC](https://discourse.processing.org/t/cannot-get-processsing-3-core-jar-to-work-with-eclipse/1112/4 "2019-03-19T22:07:11Z")

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Is it possible to have an explanation of exactly how to use jdk8 to get processing to work on eclipse? It’s not very clear how this can be done. The tutorial for eclipse appears to use macOS but doesn’t have this issue. [https://processing.org/tutorials/eclipse/](https://processing.org/tutorials/eclipse/)