Develop Reference

Apple M1 - Cannot Load rJava for xlsx package in R

I am currently working on an assignment that requires me to utilize the xlsx package in R. I have installed both "xlsx" and "rJava" packages, and have installed the most recent edition of Java to my computer.
However, when I try to load the "xlsx" package, I receive the following error:
enter image description here
> library(xlsx)
Error: package or namespace load failed for ‘xlsx’:
.onLoad failed in loadNamespace() for 'rJava', details:
call: dyn.load(jli, FALSE)
error: unable to load shared object '/Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Home/lib/jli/libjli.dylib':
dlopen(/Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Home/lib/jli/libjli.dylib, 0x000A): tried: '/Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Home/lib/jli/libjli.dylib' (mach-o file, but is an incompatible architecture (have (x86_64), need (arm64e)))
Any suggestions of how to fix this so I am able to use the xlsx package?
Thanks.
Tried searching for solutions that suggested I used a different non-Java based package to open the files, read it may be M1 Mac incompatible with Java.

JAVA R integration, R package Issues

I have a spring boot application which is calling Rscript using Rcode and while running it on a Windows machine it is working properly, I'm trying to dockerize it.
In my docker container, I'm getting the below error.
java.util.concurrent.ExecutionException: com.github.rcaller.exception.ExecutionException: R command failed with error. Reason: Error: package or namespace load failed for ‘data.table’:
object 'as.xts' not found whilst loading namespace 'data.table'
In addition: Warning message:
package ‘data.table’ was built under R version 3.6.3
Execution halted
Tried multiple options like setting environmental variables, checking R compatibility issue.
I'm new to R, how to make sure all the required R packages are properly installed?
Not finding any workaround.
Your suggestions will be very much appreciated.

Cannot get rJava to work properly in MacOS 10.14

I am trying to code using the rSymPy package. When I type in library(rSymPy) I get the following warnings:
> library(rSymPy)
Loading required package: rJython
Loading required package: rJava
Loading required package: rjson
Warning messages:
1: package ‘rJava’ was built under R version 3.4.4
2: package ‘rjson’ was built under R version 3.4.4
This is fine because in theory my code should still work. However, when I try running my function which uses the sympy() command I get the following error:
> moment_generating_function(12)
Show Traceback
Error in .jcheck() : No running JVM detected. Maybe .jinit() would help.
I then run .jinit() which produces no output. Running my code again, I now get the following error
Error in .jcall("RJavaTools", "Z", "hasField", .jcast(x, "java/lang/Object"), :
java.lang.NullPointerException
I have tried reinstalling my JDK and tried running "r cmd javareconf;" in my terminal multiple times. I would just code this directly in Python but unfortunately my assignment requires I use the rSymPy package in R. I would greatly appreciate any help with this.

R error trying to load qdap package

So I am trying to run the
library(ggplot2)
library(qdap)
but this error keeps coming up:
Unable to find any JVMs matching version "(null)".
No Java runtime present, try --request to install.
Error: package or namespace load failed for ‘qdap’:
.onLoad failed in loadNamespace() for 'rJava', details:
call: dyn.load(file, DLLpath = DLLpath, ...)
error: unable to load shared object '/Library/Frameworks/R.framework/Versions/3.4/Resources/library/rJava/libs/rJava.so':
dlopen(/Library/Frameworks/R.framework/Versions/3.4/Resources/library/rJava/libs/rJava.so, 6): Library not loaded: #rpath/libjvm.dylib
Referenced from: /Library/Frameworks/R.framework/Versions/3.4/Resources/library/rJava/libs/rJava.so
Reason: image not found
In addition: Warning message:
running command '/usr/libexec/java_home' had status 1
I am using R in Rstudio on a mac, and I've trawled through quite a few similar questions but none seem to work. I am quite new to using R and any help would be great thanks.
I tried using
install.packages("openNLPdata")
and this showed up which I think is a good thing
trying URL 'https://cran.rstudio.com/bin/macosx/el-capitan/contrib/3.4/openNLPdata_1.5.3-4.tgz'
Content type 'application/x-gzip' length 7323402 bytes (7.0 MB)
==================================================
downloaded 7.0 MB
The downloaded binary packages are in
/var/folders/h5/_5bjqp9j0g5gqr1794sw1xwh0000gn/T//RtmpaknsV6/downloaded_packages
But the error still occurs.
Thanks in advance

It seems like that package might need rJava to run, which may not be loaded in your environment. Try:
install.packages('rJava')
library('rJava')

Package xlxs installation in R has issues

When trying to install package xlxs in R I get the following error.
error: No CurrentVersion entry in Software/JavaSoft registry! Try re-installing Java and make sure R and Java have matching architectures.
Not sure what to do. I have tried reinstalling Java and still get the same error.
I have R 3.12 on a windows 10 computer.
Any advice is welcome,
Thanks

Error: package or namespace load failed for ‘xlsx’:
.onLoad failed in loadNamespace() for 'rJava', details:
call: fun(libname, pkgname)
error: No CurrentVersion entry in Software/JavaSoft registry!
Try re-installing Java and make sure R and Java have matching
architectures.
The error normally occurs when the architectures(32/64 bit) of java and r does not match.
In order to check the version of java, type java -version in cmd.
You can follow below given steps:
Rstudio > tools > global options > general settings > R-version > change (to the architecture same as that of java) > apply
And you're good to go.