[R] How do I use simple calls to java methods?

[Hurr]

Thanks so much for the reply.
I did the search for "rJava examples" and found the Scott 
Hoover instructions which seemed like exactly what I needed.
I compiled the java code and copied myExchange.java and 
myExchange.class to the directory where I started R where 
I did and the calls suggested inside worked.
But there are no parameters passed in the examples.
I need to do something like this:
dateStg <- "201310221439591234"
dateStg
doubleLin <- .jcall(CalqsLin, "D", "linTimOfCalqsStgIsLev",dateStg,-4)
or
doubleLin <- .jcall(CalqsLin, "D",
"linTimOfCalqsStgIsLev","201310221439591234",-4)
where the latter two parameters are passed to linTimOfCalqsStgIsLev.
Neither way works and I cannot understand the .jcall() instructions in
rJava.pdf well enough.
I'll keep trying, but would like help.




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