If you cannot build a java program outside R then you won't be able to do so inside R. Find a Java development resource (the JDK is one such) and get command-line ability to compile java enabled, and then come back to interfacing R with Java.
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Bogaso Christofer <bogaso.christofer@gmail.com> wrote:

Hi all, I was trying to install rJava package (some older version) from
source. However could not achieve using "Rcmd build -binary rJava" syntax
with windows cmd. The building process stopped with following error:



ERROR*> JavaSoft\{JRE|JDK} can't open registry keys.

ERROR: cannot find Java Development Kit.

Please set JAVA_HOME to specify it's location normally 

ERROR: configuration failed for package 'rJava'



With this error it seems that, I need to install some additional tool(s),
however I have Duncan's Rtools installed. 



Can somebody through some light on this issue, what I should do with this
error?



Thanks,




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