Eclipse Community Forums: Rich Client Platform (RCP) » Please help! - .jar added to build path but noClassDefFoundError

Home » Eclipse Projects » Rich Client Platform (RCP) » Please help! - .jar added to build path but noClassDefFoundError(When I moved code accross to make a an RCP, now my .jar references fail)

Please help! - .jar added to build path but noClassDefFoundError [message #1442166]

Fri, 10 October 2014 14:17

Eclipse User

I was so close to getting this working....!!

OK, I built some code that worked in a basic Java project, and added some .jars for doing http connections (using the Apache httpClient libraries). Tested and worked.

I created a fresh RCP project and dragged over all my source. I tried to drag over the .jars (which failed) so I re-added them (using this tutotial http://www.wikihow.com/Add-JARs-to-Project-Build-Paths-in-Eclipse-(Java))

Now the RCP builds and runs alright, but when I click the button that executes my code, I get a NoClassDefFound error as shown below.

Does anyone have any idea what I can do to fix this? I feel like I've tried everything!

Many thanks

Matt
[...error stuff]
!ENTRY org.eclipse.e4.ui.workbench 4 0 2014-10-10 19:15:25.135
!MESSAGE Internal Error
!STACK 0
org.eclipse.e4.core.di.InjectionException: java.lang.NoClassDefFoundError: org/apache/http/client/methods/HttpUriRequest
at org.eclipse.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:62)

[...more error stuff]

Re: Please help! - .jar added to build path but noClassDefFoundError [message #1442788 is a reply to message #1442166]

Sat, 11 October 2014 13:32

Eclipse User

OK, a little bit of further info if it can help anyone help me!

I've setup exactly the same project in a normal java project from scratch and it works fine! It's only in my RCP product that I'm getting this error.

Any help? Anyone?? Sad

Re: Please help! - .jar added to build path but noClassDefFoundError [message #1442803 is a reply to message #1442788]

Sat, 11 October 2014 14:07

Eclipse User

and a bit of further further info....

I've now created a blank RCP and tried adding my .jars and calling them and I get the same java.lang.NoClassDefFoundError: problem.

So it's certainly something in the difference between a normal java project and the RCP version.

Anyone?

Many thanks

[SOLVED] Re: Please help! - .jar added to build path but noClassDefFoundError [message #1442813 is a reply to message #1442166]

Sat, 11 October 2014 14:27

Eclipse User

Best news....

Solved by:
Quote:

Here is how i did it:

Open plug-in.xml
Go to Runtime tab.
Click on 'Add...' button in the Classpath section
Add your external jar

As a result my MANIFEST.MF now has the entry
Bundle-ClassPath: lib/myjar.jar,

The answer was here....
http://www.eclipsezone.com/eclipse/forums/t93996.html

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