Problems requiring rJava in Windows

Question

I am using a 64-bit machine, with the latest version of R (3.1.2), the latest RStudio version (0.98.1091) and the latest JAVA (Version 8 Update 31).

I tried to require r

Answer 1

I think the problem on this occasion is that your Java is 32-bit, whereas your R is 64-bit. This is why you get a R and Java have different architectures error.

In order to check what your Java version is on Windows type:

java -d64 -version

on the command line as it is mentioned here.

I think that once you install the correct Java version i.e. the 64-bit on this occasion then loading your xlsx library will work!