status of Java & rJava?

????? I spoke too soon in saying that everything worked with OpenJDK:? 
"R CMD check Ecfun_0.2-4.tar.gz" using 
"https://github.com/sbgraves237/Ecfun" worked fine on my Mac but failed 
with "error: DLL 'rJava' not found: maybe not installed for this 
architecture?" under Windows 10.? "00install.out" and 
"Sys.getenv('PATH')" follow.? "library(rJava)" seemed to work, and 
"help(pac='rJava') displays 0.9-12.? Suggestions?? Thanks, Spencer Graves


* installing *source* package 'Ecfun' ...
** using staged installation
** R
** inst
** byte-compile and prepare package for lazy loading
** help
*** installing help indices
** building package indices
** installing vignettes
** testing if installed package can be loaded from temporary location
*** arch - i386
Error: package or namespace load failed for 'Ecfun':
 ?.onLoad failed in loadNamespace() for 'rJava', details:
 ? call: library.dynam("rJava", pkgname, libname)
 ? error: DLL 'rJava' not found: maybe not installed for this architecture?
Error: loading failed
Execution halted
*** arch - x64
ERROR: loading failed for 'i386'
* removing 'C:/Users/spenc/Documents/R/Ecfun/Ecfun.Rcheck/Ecfun'

######################

 > Sys.getenv('PATH')
[1] "C:\\Program Files\\R\\R-3.6.3\\bin\\x64;C:\\Program 
Files\\AdoptOpenJDK\\jdk-11.0.6.10-hotspot\\bin;C:\\Program 
Files\\Java\\jre1.8.0_241;C:\\Rtools\\bin;C:\\WINDOWS\\system32;C:\\WINDOWS;C:\\WINDOWS\\System32\\Wbem;C:\\WINDOWS\\System32\\WindowsPowerShell\\v1.0\\;C:\\WINDOWS\\System32\\OpenSSH\\;C:\\Program 
Files\\Microsoft VS Code\\bin;C:\\Program Files\\Git\\cmd;C:\\Program 
Files\\TortoiseSVN\\bin;c:\\programFiles\\ffmpeg\\ffmpeg-4.1\\;C:\\Program 
Files\\Pandoc\\;C:\\Program Files\\MiKTeX 
2.9\\miktex\\bin\\x64\\;C:\\Users\\spenc\\AppData\\Local\\Microsoft\\WindowsApps;C:\\Users\\spenc\\AppData\\Local\\GitHubDesktop\\bin;C:\\FFmpeg\\bin;C:\\RBuildTools\\3.5\\bin;C:\\Program 
Files\\R\\R-3.6.3\\bin;C:\\Users\\spenc\\AppData\\Local\\Microsoft\\WindowsApps;C:\\RBuildTools\\3.5\\;"

On 29/03/2020 04:07, Simon Urbanek wrote:

Spencer,

you could argue that Java is dead since Oracle effectively killed it 
by removing all public downloads, but if you manage to get hold of a 
Java installation then it works just fine with R. To my best 
knowledge there has never been an issue if you installed rJava from 
source. macOS Catalina has made binary distributions impossible due 
to additional restrictions on run-time, but even that has been how 
solved with the release of rJava 0.9-12, so please make sure you use 
the latest rJava. In most cases that I have seen issues were caused 
by incorrect configuration (setting JAVA_HOME incorrectly [do NOT set 
it unless you know what you're doing!], not installing Java for the 
same architecture as R etc.). If you have any issues feel free to 
report them. rJava 0.9-12 has quite a few changes that try to detect 
user errors better and report them so I strongly suggest users to 
upgrade.

There is OpenJDK, and https://adoptopenjdk.net provides binaries for 
macOS, including the preferred Java 11 LTS.? I just re-checked that, 
and after

env 
JAVA_HOME=/Library/Java/JavaVirtualMachines/adoptopenjdk-11.jdk/Contents/Home 
R CMD javareconf

I was able to install from source and check rJava 0.9-12 in 4.0.0 
alpha. ?For the CRAN binary of 3.6.3 I had to make sure I was using 
clang 7: 'clang' defaults to that in the Apple CLT which does not 
support -fopenmp -- but the binary package just worked.

[All on Catalina.]

Thanks.? That worked on Catalina.? When installing OpenJDK on Windows 
10, The default for "Set JAVA_HOME" was 'X';? I changed that to 
install.? It didn't work at first, but did after I rebooted.


Thanks again to both Simon Urbanek and Prof. Ripley.? Spencer Graves