I am using intellij to create a jar file. I have 5 jar files in the project as dependencies. I have added these 5 jar files in the artifact setting as follows.
I am able to run the project fine in intellij but when I try to run the jar I created it says it cannot find the class of one of the jars, which does not make sense to me. I have even tried making the jar with editing the classpath in the artifacts settings. Any help would be appreciative.
Thanks.
The path of the jars will only works well for your IDE because the IDE configured the path environment for testing, but once you run your code without IDEs, the path will follow your default setting with the system environmental variables.
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I'm trying to find more information on how eclipse handles Running a project.
I want to understand it more because I have an issue I'm currently having where apache-poi .jar files which have been included into the classpath of my project will work properly when the project is ran through eclipse, but will not be detected when going to the same projects folder and running the main jar file to start the program.
It gives me the error: java.lang.NoClassDefFoundError: org/apache/poi/ss/usermodel/Cell (although sometimes instead of Cell, it's Sheet)
What could I consult to understand what is going on here, and possibly solve this issue?
Your NoClassDefFoundError indicates that the library was not available while running the jar.
This depends upon how you are exporting your project into the jar file.
If you're using eclipse to do so, you can:
Export->Java->Runnable Jar to create a jar that includes its dependencies
Make sure to check Package required libraries into generated JAR.
This will make all your jars (in build path including apache-poi.jar) as a part of the final jar.
It runs from eclipse because libraries are on the build path of the eclipse which makes them available in the classpath.
I have several libraries in my intelliJ and one of them has junit jar. But project is not able to compiled because classes does not see the junit jar, although it is added under libraries.
I solved this problem by adding junit jar to another library and problem solved. But I want to know where is it specified (in which file) that in which library intelliJ is looking?
It depends on your project setup in Idea where they are being stored.
Either is the configuration located within the following folder structure:
.idea
Or within either of these files:
*.iml, *.ipr
^-- these files/folders is located under /path/to/your/project/<file/path>
I'm using eclipse and ant to compile a java project. The ant compile script calls javac using a classpath refid of classpath, which is set based on System Property variable java.build.path.
My java.build.path variable is missing a library that was specified in
Project->Properties->Java Build Path->Libraries.
That is, the external jar was properly added to the list of libraries to add to the build path, is not missing or corrupt, and I have every expectation that eclipse would include the library in the build path. My build fails because java.build.path is missing this library.
Furthermore, the file <projectDir>/.classpath contains a valid classpathentry element for the missing jar file.
When building, javac fails at an import statement, claiming that the package does not exist. The value of java.build.classpath contains many of the libraries I set in the project properties, but does not include the missing library. Its as if the project property for that external jar was never set.
For what its worth, the missing library is jboss/lib/jbosssx.jar
Any help here would be appreciated.
At first,
Download jbosssx.jar jar file from this link
Then keep the jar file in the folder jboss/lib
Hope it will solve your issue.
UPDATE:
Sometimes jar files need to keep in lib folder physically. For this reason, you can put the jar file in your project lib folder.
I found where my configuration was messed up.
Using External Tools Configurations within eclipse, I found another Classpath settings tab for my ant build that did not contain my library.
Adding my library here caused the build to succeed!
Skywalker, thanks for the suggestion. :)
I have a plain Java project (not a plugin project) which I want to add to a classpath of a eclipse plugin which I am developing. But in web projects I can add that project as a build path and it works fine. But I tried same thing in eclipse plugin, I am able to compile successfully, but at run time I am getting java.lang.ClassNotFoundException.
I know OSGi quite well and I know how to add OSGi into an classpath (using export-packages) but what I want is to add Standard, non-osgi project into an classpath, so that I wont' get runtime errors. Is there anyway I can achieve this?
I can export project as a jar file or make it as a plugin project and it would work fine. But that's not my option currently because, still that API is in pre-alpha stage, and there would be lot of changes going on. So I am trying to avoid pain of exporting it as jar file everytime. Is there any option for me other than this?
I have a similar situation: I want non-OSGi Maven dependencies integrated into the classpath of my plugin. I succeeded with a roundabout solution, which I think is the best I could get.
I have a build step outside of Eclipse where I copy the class files of the dependency into the plugin's lib folder. The lib folder is specified in MANIFEST.MF as an entry in Bundle-ClassPath and (here comes the hack) as a source folder in build.properties. That was the only way to make the plugin work both when launched from within Eclipse and when exported.
I have a Java project that utilizes Jython to interface with a Python module. With my configuration, the program runs fine, however, when I export the project to a JAR file, I get the following error:
Jar export finished with problems. See details for additional information.
Fat Jar Export: Could not find class-path entry for 'C:Projects/this_project/src/com/company/python/'
When browsing through the generated JAR file with an archive manager, the python module is in fact inside of the JAR, but when I check the manifest, only "." is in the classpath. I can overlook this issue by manually dropping the module into the JAR file after creation, but since the main point of this project is automation, I'd rather be able to configure Eclipse to generate properly configured JAR automatically. Any ideas?
*NOTE*I obviously cannot run the program successfully when I do this, but removing the Python source folder from the classpath in "Run Configurations..." makes the error go away.
Figured it out, had to add the source folder with the Python module in it as a class folder in the Build Path project properties. Not sure if this next part is necessary or not, but since the module is not compiled, I added the folder again as "Attached Source" after adding the class folder.
Have a look at the maven-jython-compile-plugin and its demo project at http://mavenjython.sourceforge.net/ . It allows bundling jython with dependencies into a standalone jar.