On 22/04/18 19:51, Cumulative Knowledge wrote:
I've been trying a few different things that produce different results.
Thought this information might be helpful.
$ java Tutorial01
Error: Could not find or load main class Tutorial01
$ java -cp "$JENA_HOME/lib/*:" Tutorial01
log4j:WARN No appenders could be found for logger (Jena).
log4j:WARN Please initialize the log4j system properly.
log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for
more info.
see various questions stackoverflow. They are just warnings.
$ sudo java Tutorial01
Exception in thread "main" java.lang.NoClassDefFoundError:
org/apache/jena/rdf/model/ModelFactory
at Tutorial01.main(Tutorial01.java:34)
Caused by: java.lang.ClassNotFoundException:
org.apache.jena.rdf.model.ModelFactory
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 1 more
$ sudo java -cp "$JENA_HOME/lib/*:" Tutorial01
Incorrect format: Escape the "*", no :
log4j:WARN No appenders could be found for logger (Jena).
log4j:WARN Please initialize the log4j system properly.
log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for
more info.
On Sun, Apr 22, 2018 at 1:42 AM, Andy Seaborne <[email protected]> wrote:
Louis,
The exception means that the classpth does not contain the jena-core jar.
Put all the jars from the distribution lib directory in the classpath.
Nowadays in java you can put '...\lib\*' on the classpath and it will
include all the jars in that directory.
See the bat scripts in the download or
https://github.com/apache/jena/tree/master/apache-jena/bat
then print out the classpath to make sure it is right.
Andy
On 21/04/18 20:53, Cumulative Knowledge wrote:
I'm getting Apache Jena set up and am having some issues. I think my issue
is with environment variable, but I'm not sure.
Here is what I've posted on Stack Overflow:
Based on this tutorial
<http://staff.um.edu.mt/cabe2/lectures/webscience/docs/jena.pdf> I've
gotten my workspace set up. I've removed the package identifier from my
code
The way to call main is to use it's full name, package included:
java -cp ... <fullname>
java -cp ... a.b.C
where C has the static main method
<https://stackoverflow.com/questions/36402759/error-could-
not-find-or-load-main-class-classdemo>
.
Now I get this error:
Exception in thread "main" java.lang.NoClassDefFoundError:
org/apache/jena/rdf/model/ModelFactory at
Tutorial01.main(Tutorial01.java:34)
Caused by: java.lang.ClassNotFoundException:
org.apache.jena.rdf.model.ModelFactory
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
I think it's a JENAROOT Issue. I think I'm setting it and adding it
<https://stackoverflow.com/questions/28177971/tdbloader2-fai
ls-with-classpath-error/28181902#28181902>
to the path correctly. It's also mentioned here
<https://jena.apache.org/documentation/tools/>, but I haven't been able
to
troubleshoot it yet.
Anybody can point me in the right direction?
Thanks,
Louis
