Problems when trying to load a package in R due to rJava

Question

When I type require xlsx  in order to load the package xlsx in R  the following messages is shown    gt  require xlsx  Loading required package  xlsx Loading required package  xlsxjars Loading required package  rJava Error    onLoad failed in loadNamespace   for  rJava   details    call  fun libname  pkgname    error  JAVA HOME cannot be determined from the Registry Failed with error      package    rJava    could not be loaded      I ve also tried to load the rJava package manually but got this error message   require rJava  Loading required package  rJava Error    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    Do you have any suggestion on how to solve the problem

User · Answer

Answer in link resolved my issue   Before resolution  I tried by adding JAVA HOME to windows environments  It resolved this error but created another issue  The solution in above link resolves this issue without creating additional issues

User · Answer

I had a similar problem what worked for me was to set JAVA HOME  I tired it first in R  Sys setenv JAVA HOME    quot C  Program Files Java jdk1 8 0 101  quot    And when it actually worked I set it in System Properties - gt  Advanced - gt  Environment Variables by adding a new System variable  I then restarted R RStudio and everything worked

User · Answer

For reading writing excel files  you can use    readxl package for reading and writexl package for writing openxlsx package for reading and writing  With xlsx and XLConnect  which use rjava  you will face memory errors if you have large files

User · Answer

The reason is probably linked to the fact you are using a 64-bit OS and R version but do not have Java installed with the same architecture  What you have to do is to download Java 64-bit from this page  https   www java com en download manual jsp  After that just try to reload the xlsx package  You shouldn t need to re-start R

User · Answer

I had a similar issue  It is caused due the dependent package  rJava   This problem can be overcome by re-directing the R to use a different JAVA HOME   if Sys getenv  JAVA HOME             Sys setenv JAVA HOME       library rJava    This worked for me

User · Answer

If you have this issue with macOS  there is no easy way here    Especially  when you want to use R3 4  I have been there already  R 3 4  rJava  macOS and even more mess For R3 3 it s a little bit easier  R3 3 was compiled using different compiler   R  Java  rJava and macOS adventures

User · Answer

Its because either one of the Java versions 32 bit 64 bit  is missing from your computer  Try installing both the Jdks and run the code  After installing the Jdks open R and type the code   system  java -version     This will give you the version of Jdk installed  Then try loading the rJava package  This worked for me

User · Answer

An alternative package that you can use is readxl  This package don t require external dependencies

User · Answer

If you have this error in RStudio  use Lauren s environmental code above and change your R version to the 32 bit version in Tools  Global Options  There should be both 32bit and 64bit R options if you have a newer version  This will require a restart of R  and limit your memory options  Installing the 64 bit version of the jre won t be required though

[r] Problems when trying to load a package in R due to rJava

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