[R] Using Java methods in R

hill0093 hill0093 at umn.edu
Sun Apr 24 18:30:31 CEST 2011

Thanks Icn, for suggesting .jaddClassPath
I finally had time to play around and discover what you meant.
So I am one step farther than the report in the second post above:
I have the RGui with R Console on the screen.
On the top pullDowns, Packages > Install Packages > USA(IA)> rJava 
> library(rJava)
> .jinit()
> ## > ?rJava::.jaddClassPath
> .jaddClassPath("C:/ad/j")  ##or > .jaddClassPath("C:\\ad\\j")
> print(.jclassPath())
[1] "C:\\Users\\ENVY17\\Documents\\R\\win-library\\2.12\\rJava\\java"
[2] "C:\\ad\\j"                                                      
> qsLin <- .jnew("CalqsLin")
> dblTim <-
> .jcall(qsLin,returnSig="D","linTimOfCalqsStgIsLev","201104052359599999","-4")
Error in .jcall(qsLin, returnSig = "D", "linTimOfCalqsStgIsLev",
"201104052359599999",  : 
  method linTimOfCalqsStgIsLev with signature
(Ljava/lang/String;Ljava/lang/String;)D not found

What's wrong?
Just to show my intentions, 
I had next wanted to call this java function method:

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