“unable to load shared object” when loading the rJava library

Question

I apologize in advance for my bad english, i hope that someone can help me. I have to load an Excel file .xlsx on R, but:

library(xlsx)

Answer 1

This was happening to me as well (also Windows 10), and the problem with mine was that the environment variable was not set properly. In my case, I had to do

Sys.setenv('JAVA_HOME' = 'C:/Program Files (x86)/Java/jre1.8.0_161/')

Just change the folder name to where Java lives in your computer, and let me know if this doesn't work out.

Answer 2

In Ubuntu 16.04 I did the following trick in RStudio:

Sys.setenv('JAVA_HOME' = '/usr/lib/jvm/java-8-oracle/jre')

Surprisingly, but

Sys.setenv('JAVA_HOME' = '/usr/lib/jvm/java-8-oracle/')

didn't work for me.