Installing the rJava package on Ubuntu is not quite as simple as most other R packages. Some quick notes on how to do it.
- Update the repository listings.
sudo apt update -y
- Install the Java Runtime Environment (JRE) and Java Development Kit (JDK).
sudo apt install -y openjdk-8-jdk openjdk-8-jre
- Update where R expects to find various Java files.
If you get an error about
sudo R CMD javareconf
jni.hnot being found, then try this:
sudo R CMD javareconf JAVA_HOME=/usr/lib/jvm/java-8-openjdk-amd64/
- Install the package.
- If you have a RStudio session open, then exit and restart it. This is important (a running RStudio session will not pick up these changes!).