[Rd] status of Java & rJava?

[Spencer Graves]

       Tomas Kalibera kindly suggested I might have both 32- and 64-bit 
Java installed, and it might be accessing the 32-bit.  He further 
suggested:


        R CMD check Ecfun_0.2-4.tar.gz --no-multiarch


       That worked.  Thanks, Thomas.


       Spencer

On 2020-03-29 08:03, Spencer Graves wrote:
> 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 2020-03-28 23:07, Prof Brian Ripley wrote:
>> 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
>
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