I'm having some issues with getting my own jars to work properly with
rJava.
Bear with me as I explain my scenario:
I have a java package called rjbridge, with the following classes:
RJBridge.class
ObjectInfo.class
....
....
Each of the classes has the following line on top: package com.rjbridge
My directory structure is:
/home/Danish/java/com/rjbridge
All the class files lie in the above directory
I use the following commands to compile and jar:
cd /home/Danish/java
javac -d . ./com/rjbridge/*.java
jar -cvf rjbridge.jar ./com/rjbridge
So far, so good. Everything works as it should, and I can use the
RJBridge class as follows:
java -cp /home/Danish/java/rjbridge.jar RJBridge [args]
and it runs fine.
Now in R, when I try the following:
>library(rJava)
>.jinit()
>.jaddClassPath("/home/Danish/java/rjbridge.jar")
> r<-.jnew("ObjectInfo")
I get,
Exception in thread "main" java.lang.ClassNotFoundException
at RJavaClassLoader.findClass(RJavaClassLoader.java:195)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:242)
Error in .jnew("ObjectInfo") : Failed to create object of class
`ObjectInfo'
In addition: Warning message:
createObject.FindClass ObjectInfo failed in: .jnew("ObjectInfo")
Trying:
> r<-.jnew("rjbridge.ObjectInfo")
Gives the following:
Exception in thread "main" java.lang.ClassNotFoundException
at RJavaClassLoader.findClass(RJavaClassLoader.java:195)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:242)
Error in .jnew("rjbridge.ObjectInfo") : Failed to create object of class
`rjbridge/ObjectInfo'
I've spent a lot of time trying this in a number of different ways, but
to no avail. Will some kind soul help me out here?
Thanks
Danish
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